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sms/kbd: update instructions for Forth Collapse OS
The keyboard is a bit glitchy, but these are the same glitch as those that were already present in Z80 Collapse OS. They still need fixing...
This commit is contained in:
Virgil Dupras
parent
b06cf09754
commit
b5683f447b
@ -18,7 +18,6 @@ This recipe is for installing a minimal Collapse OS system on the SMS. There
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are other recipes related to the SMS:
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* [Interfacing a PS/2 keyboard](kbd/README.md)
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* [zasm and ed from ROM](romasm/README.md)
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## Gathering parts
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@ -1,69 +0,0 @@
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; 8K of onboard RAM
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.equ RAMSTART 0xc000
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; Memory register at the end of RAM. Must not overwrite
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.equ RAMEND 0xfdd0
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jp init
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.fill 0x66-$
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retn
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.inc "err.h"
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.inc "ascii.h"
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.inc "core.asm"
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.inc "str.asm"
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.equ PAD_RAMSTART RAMSTART
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.inc "sms/pad.asm"
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.inc "sms/vdp.asm"
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.equ GRID_RAMSTART PAD_RAMEND
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.equ GRID_COLS VDP_COLS
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.equ GRID_ROWS VDP_ROWS
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.equ GRID_SETCELL vdpSetCell
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.equ GRID_GETC padGetC
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.inc "grid.asm"
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.equ STDIO_RAMSTART GRID_RAMEND
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.equ STDIO_GETC gridGetC
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.equ STDIO_PUTC gridPutC
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.inc "stdio.asm"
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; *** BASIC ***
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; RAM space used in different routines for short term processing.
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.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
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.equ SCRATCHPAD STDIO_RAMEND
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.inc "lib/util.asm"
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.inc "lib/ari.asm"
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.inc "lib/parse.asm"
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.inc "lib/fmt.asm"
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.equ EXPR_PARSE parseLiteralOrVar
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.inc "lib/expr.asm"
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.inc "basic/util.asm"
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.inc "basic/parse.asm"
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.inc "basic/tok.asm"
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.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
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.inc "basic/var.asm"
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.equ BUF_RAMSTART VAR_RAMEND
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.inc "basic/buf.asm"
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.equ BAS_RAMSTART BUF_RAMEND
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.inc "basic/main.asm"
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init:
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di
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im 1
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ld sp, RAMEND
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call gridInit
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call padInit
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call vdpInit
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call basInit
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jp basStart
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FNT_DATA:
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.bin "fnt/7x7.bin"
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.fill 0x7ff0-$
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.db "TMR SEGA", 0x00, 0x00, 0xfb, 0x68, 0x00, 0x00, 0x00, 0x4c
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@ -1,22 +0,0 @@
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PROGNAME = ps2ctl
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AVRDUDEMCU ?= t45
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AVRDUDEARGS ?= -c usbtiny -P usb
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TARGETS = $(PROGNAME).bin
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BASEDIR = ../../..
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EDIR = $(BASEDIR)/emul
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# Rules
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.PHONY: send all clean
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all: $(TARGETS)
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@echo Done!
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send: $(PROGNAME).bin
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avrdude $(AVRDUDEARGS) -p $(AVRDUDEMCU) -U flash:w:$(PROGNAME).bin
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$(PROGNAME).bin: $(PROGNAME).fs
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cd $(EDIR) && ./avra.sh < ../recipes/sms/kbd/$(PROGNAME).fs > ../recipes/sms/kbd/$@
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clean:
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rm -f $(TARGETS)
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@ -100,16 +100,16 @@ The code expects a SR-latch that works like a 4043, that is, S and R are
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triggered high, S makes Q high, R makes Q low. R is hooked to PB4. S is hooked
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to TH (and also the A/B on the '157). Q is hooked to PB0 and TL.
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## Usage
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## Building the binary
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The code in this recipe is set up to listen to the keyboard on port B, leaving
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port A to drive, for example, an Everdrive with a D-pad. Unlike the generic
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SMS recipe, this kernel has no character selection mechanism. It acts like a
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regular shell, taking input from the keyboard.
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We start with the base recipe and add a few things:
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`kernel/sms/kbd.asm` also has a FetchKC implementation for port A if you prefer.
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Just hook it on. I've tried it, it works.
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1. at the top: `RAMSTART 0x72 + CONSTANT PS2_MEM`
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2. After VDP load: `641 LOAD : (ps2kc) (ps2kcB) ;` (that binds us to port B)
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3. Right after: `411 414 LOADR` (that gives us `(key)`)
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4. After `VDP$`: `PS2$`.
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Did you get there? Feels pretty cool huh?
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Rebuild, send to SMS, then run with your keyboard interface plugged to PortB.
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It should mostly work. There are still a few glitches to iron out...
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[rc2014-ps2]: ../../rc2014/ps2
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@ -1,82 +0,0 @@
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; 8K of onboard RAM
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.equ RAMSTART 0xc000
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; Memory register at the end of RAM. Must not overwrite
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.equ RAMEND 0xddd0
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jp init
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.fill 0x66-$
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retn
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.inc "err.h"
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.inc "ascii.h"
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.inc "core.asm"
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.inc "str.asm"
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.inc "sms/kbd.asm"
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.equ KBD_RAMSTART RAMSTART
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.equ KBD_FETCHKC smskbdFetchKCB
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.inc "kbd.asm"
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.inc "sms/vdp.asm"
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.equ GRID_RAMSTART KBD_RAMEND
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.equ GRID_COLS VDP_COLS
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.equ GRID_ROWS VDP_ROWS
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.equ GRID_SETCELL vdpSetCell
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.equ GRID_GETC kbdGetC
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.inc "grid.asm"
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.equ STDIO_RAMSTART GRID_RAMEND
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.equ STDIO_GETC gridGetC
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.equ STDIO_PUTC gridPutC
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.inc "stdio.asm"
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; *** BASIC ***
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; RAM space used in different routines for short term processing.
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.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
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.equ SCRATCHPAD STDIO_RAMEND
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.inc "lib/util.asm"
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.inc "lib/ari.asm"
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.inc "lib/parse.asm"
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.inc "lib/fmt.asm"
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.equ EXPR_PARSE parseLiteralOrVar
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.inc "lib/expr.asm"
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.inc "basic/util.asm"
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.inc "basic/parse.asm"
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.inc "basic/tok.asm"
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.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
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.inc "basic/var.asm"
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.equ BUF_RAMSTART VAR_RAMEND
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.inc "basic/buf.asm"
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.equ BAS_RAMSTART BUF_RAMEND
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.inc "basic/main.asm"
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init:
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di
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im 1
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ld sp, RAMEND
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; Initialize the keyboard latch by "dummy reading" once. This ensures
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; that the adapter knows it can fill its '164.
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; Port B TH output, high
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ld a, 0b11110111
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out (0x3f), a
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nop
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; Port A/B reset
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ld a, 0xff
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out (0x3f), a
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call kbdInit
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call gridInit
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call vdpInit
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call basInit
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jp basStart
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FNT_DATA:
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.bin "fnt/7x7.bin"
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.fill 0x7ff0-$
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.db "TMR SEGA", 0x00, 0x00, 0xfb, 0x68, 0x00, 0x00, 0x00, 0x4c
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@ -1,348 +0,0 @@
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; Receives keystrokes from PS/2 keyboard and send them to the '164. On the PS/2
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; side, it works the same way as the controller in the rc2014/ps2 recipe.
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; However, in this case, what we have on the other side isn't a z80 bus, it's
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; the one of the two controller ports of the SMS through a DB9 connector.
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; The PS/2 related code is copied from rc2014/ps2 without much change. The only
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; differences are that it pushes its data to a '164 instead of a '595 and that
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; it synchronizes with the SMS with a SR latch, so we don't need PCINT. We can
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; also afford to run at 1MHz instead of 8.
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; *** Register Usage ***
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;
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; GPIOR0 flags:
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; 0 - when set, indicates that the DATA pin was high when we received a
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; bit through INT0. When we receive a bit, we set flag T to indicate
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; it.
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;
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; R16: tmp stuff
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; R17: recv buffer. Whenever we receive a bit, we push it in there.
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; R18: recv step:
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; - 0: idle
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; - 1: receiving data
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; - 2: awaiting parity bit
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; - 3: awaiting stop bit
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; R19: Register used for parity computations and tmp value in some other places
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; R20: data being sent to the '164
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; Y: pointer to the memory location where the next scan code from ps/2 will be
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; written.
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; Z: pointer to the next scan code to push to the 595
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;
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.inc "avr.h"
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.inc "tn254585.h"
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.inc "tn45.h"
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; *** Constants ***
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.equ CLK 2 ; Port B
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.equ DATA 1 ; Port B
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.equ CP 3 ; Port B
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; SR-Latch's Q pin
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.equ LQ 0 ; Port B
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; SR-Latch's R pin
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.equ LR 4 ; Port B
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; init value for TCNT0 so that overflow occurs in 100us
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.equ TIMER_INITVAL 0x100-100
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; *** Code ***
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rjmp main
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rjmp hdlINT0
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; Read DATA and set GPIOR0/0 if high. Then, set flag T.
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; no SREG fiddling because no SREG-modifying instruction
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hdlINT0:
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sbic PINB, DATA ; DATA clear? skip next
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sbi GPIOR0, 0
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set
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reti
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main:
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ldi r16, RAMEND&0xff
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out SPL, r16
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ldi r16, RAMEND}8
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out SPH, r16
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; init variables
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clr r18
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out GPIOR0, r18
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; Setup int0
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; INT0, falling edge
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ldi r16, 0x02 ; ISC01
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out MCUCR, r16
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; Enable INT0
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ldi r16, 0x40 ; INT0
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out GIMSK, r16
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; Setup buffer
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clr YH
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ldi YL, SRAM_START&0xff
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clr ZH
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ldi ZL, SRAM_START&0xff
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; Setup timer. We use the timer to clear up "processbit" registers after
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; 100us without a clock. This allows us to start the next frame in a
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; fresh state. at 1MHZ, no prescaling is necessary. Each TCNT0 tick is
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; already 1us long.
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ldi r16, 0x01 ; CS00 - no prescaler
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out TCCR0B, r16
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; init DDRB
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sbi DDRB, CP
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cbi PORTB, LR
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sbi DDRB, LR
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sei
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loop:
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brts processbit ; flag T set? we have a bit to process
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cp YL, ZL ; if YL == ZL, buffer is empty
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brne sendTo164 ; YL != ZL? our buffer has data
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; nothing to do. Before looping, let's check if our communication timer
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; overflowed.
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in r16, TIFR
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sbrc r16, 1 ; TOV0
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rjmp processbitReset ; Timer0 overflow? reset processbit
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; Nothing to do for real.
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rjmp loop
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; Process the data bit received in INT0 handler.
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processbit:
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in r19, GPIOR0 ; backup GPIOR0 before we reset T
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andi r19, 0x1 ; only keep the first flag
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cbi GPIOR0, 0
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clt ; ready to receive another bit
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; We've received a bit. reset timer
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rcall resetTimer
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; Which step are we at?
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tst r18
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breq processbits0
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cpi r18, 1
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breq processbits1
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cpi r18, 2
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breq processbits2
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; step 3: stop bit
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clr r18 ; happens in all cases
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; DATA has to be set
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tst r19 ; Was DATA set?
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breq loop ; not set? error, don't push to buffer
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; push r17 to the buffer
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st Y+, r17
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rcall checkBoundsY
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rjmp loop
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processbits0:
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; step 0 - start bit
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; DATA has to be cleared
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tst r19 ; Was DATA set?
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brne loop ; Set? error. no need to do anything. keep r18
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; as-is.
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; DATA is cleared. prepare r17 and r18 for step 1
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inc r18
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ldi r17, 0x80
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rjmp loop
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processbits1:
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; step 1 - receive bit
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; We're about to rotate the carry flag into r17. Let's set it first
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; depending on whether DATA is set.
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clc
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sbrc r19, 0 ; skip if DATA cleared.
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sec
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; Carry flag is set
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ror r17
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; Good. now, are we finished rotating? If carry flag is set, it means
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; that we've rotated in 8 bits.
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brcc loop ; we haven't finished yet
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; We're finished, go to step 2
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inc r18
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rjmp loop
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processbits2:
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; step 2 - parity bit
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mov r1, r19
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mov r19, r17
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rcall checkParity ; --> r16
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cp r1, r16
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brne processbitError ; r1 != r16? wrong parity
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inc r18
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rjmp loop
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processbitError:
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clr r18
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ldi r19, 0xfe
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rcall sendToPS2
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rjmp loop
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processbitReset:
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clr r18
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rcall resetTimer
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rjmp loop
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; Send the value of r20 to the '164
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sendTo164:
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sbis PINB, LQ ; LQ is set? we can send the next byte
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rjmp loop ; Even if we have something in the buffer, we
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; can't: the SMS hasn't read our previous
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; buffer yet.
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; We disable any interrupt handling during this routine. Whatever it
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; is, it has no meaning to us at this point in time and processing it
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; might mess things up.
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cli
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sbi DDRB, DATA
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ld r20, Z+
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rcall checkBoundsZ
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ldi r16, 8
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sendTo164Loop:
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cbi PORTB, DATA
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sbrc r20, 7 ; if leftmost bit isn't cleared, set DATA high
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sbi PORTB, DATA
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; toggle CP
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cbi PORTB, CP
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lsl r20
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sbi PORTB, CP
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dec r16
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brne sendTo164Loop ; not zero yet? loop
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; release PS/2
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cbi DDRB, DATA
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sei
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; Reset the latch to indicate that the next number is ready
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sbi PORTB, LR
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cbi PORTB, LR
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rjmp loop
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resetTimer:
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ldi r16, TIMER_INITVAL
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out TCNT0, r16
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ldi r16, 0x02 ; TOV0
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out TIFR, r16
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ret
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; Send the value of r19 to the PS/2 keyboard
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sendToPS2:
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cli
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; First, indicate our request to send by holding both Clock low for
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; 100us, then pull Data low
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; lines low for 100us.
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cbi PORTB, CLK
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sbi DDRB, CLK
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rcall resetTimer
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; Wait until the timer overflows
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in r16, TIFR
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sbrs r16, 1 ; TOV0
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rjmp $-4
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; Good, 100us passed.
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; Pull Data low, that's our start bit.
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cbi PORTB, DATA
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sbi DDRB, DATA
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; Now, let's release the clock. At the next raising edge, we'll be
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; expected to have set up our first bit (LSB). We set up when CLK is
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; low.
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cbi DDRB, CLK ; Should be starting high now.
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; We will do the next loop 8 times
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ldi r16, 8
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; Let's remember initial r19 for parity
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mov r1, r19
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sendToPS2Loop:
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; Wait for CLK to go low
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sbic PINB, CLK
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rjmp $-2
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; set up DATA
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cbi PORTB, DATA
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sbrc r19, 0 ; skip if LSB is clear
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sbi PORTB, DATA
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lsr r19
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; Wait for CLK to go high
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sbis PINB, CLK
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rjmp $-2
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dec r16
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brne sendToPS2Loop ; not zero? loop
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; Data was sent, CLK is high. Let's send parity
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mov r19, r1 ; recall saved value
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rcall checkParity ; --> r16
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; Wait for CLK to go low
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sbic PINB, CLK
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rjmp $-2
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; set parity bit
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cbi PORTB, DATA
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sbrc r16, 0 ; parity bit in r16
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sbi PORTB, DATA
|
||||
|
||||
; Wait for CLK to go high
|
||||
sbis PINB, CLK
|
||||
rjmp $-2
|
||||
|
||||
; Wait for CLK to go low
|
||||
sbic PINB, CLK
|
||||
rjmp $-2
|
||||
|
||||
; We can now release the DATA line
|
||||
cbi DDRB, DATA
|
||||
|
||||
; Wait for DATA to go low. That's our ACK
|
||||
sbic PINB, DATA
|
||||
rjmp $-2
|
||||
|
||||
; Wait for CLK to go low
|
||||
sbic PINB, CLK
|
||||
rjmp $-2
|
||||
|
||||
; We're finished! Enable INT0, reset timer, everything back to normal!
|
||||
rcall resetTimer
|
||||
clt ; also, make sure T isn't mistakely set.
|
||||
sei
|
||||
ret
|
||||
|
||||
; Check that Y is within bounds, reset to SRAM_START if not.
|
||||
checkBoundsY:
|
||||
tst YL
|
||||
breq $+4
|
||||
ret ; not zero, nothing to do
|
||||
; YL is zero. Reset Y
|
||||
clr YH
|
||||
ldi YL, SRAM_START&0xff
|
||||
ret
|
||||
|
||||
; Check that Z is within bounds, reset to SRAM_START if not.
|
||||
checkBoundsZ:
|
||||
tst ZL
|
||||
breq $+4
|
||||
ret ; not zero, nothing to do
|
||||
; ZL is zero. Reset Z
|
||||
clr ZH
|
||||
ldi ZL, SRAM_START&0xff
|
||||
ret
|
||||
|
||||
; Counts the number of 1s in r19 and set r16 to 1 if there's an even number of
|
||||
; 1s, 0 if they're odd.
|
||||
checkParity:
|
||||
ldi r16, 1
|
||||
lsr r19
|
||||
brcc $+4 ; Carry unset? skip next
|
||||
inc r16 ; Carry set? We had a 1
|
||||
tst r19 ; is r19 zero yet?
|
||||
brne checkParity+2 ; no? loop and skip first LDI
|
||||
andi r16, 0x1 ; Sets Z accordingly
|
||||
ret
|
||||
|
||||
1
recipes/sms/romasm/.gitignore
vendored
1
recipes/sms/romasm/.gitignore
vendored
@ -1 +0,0 @@
|
||||
user.h
|
||||
@ -1,21 +0,0 @@
|
||||
BASEDIR = ../../..
|
||||
ZASM = $(BASEDIR)/emul/zasm/zasm
|
||||
KERNEL = $(BASEDIR)/kernel
|
||||
APPS = $(BASEDIR)/apps
|
||||
|
||||
.PHONY: all clean
|
||||
all: os.sms
|
||||
|
||||
# -o value synced with offset in glue.asm
|
||||
ed.bin: $(APPS)/ed/glue.asm
|
||||
$(ZASM) -o 1f $(KERNEL) $(APPS) user.h < $(APPS)/ed/glue.asm > $@
|
||||
|
||||
# -o value synced with offset in glue.asm
|
||||
zasm.bin: $(APPS)/zasm/glue.asm
|
||||
$(ZASM) -o 24 $(KERNEL) $(APPS) user.h < $(APPS)/zasm/glue.asm > $@
|
||||
|
||||
os.sms: glue.asm ed.bin zasm.bin
|
||||
$(ZASM) $(KERNEL) $(APPS) ed.bin zasm.bin < glue.asm > $@
|
||||
|
||||
clean:
|
||||
rm -f os.sms ed.bin zasm.bin
|
||||
@ -1,61 +0,0 @@
|
||||
# zasm and ed from ROM
|
||||
|
||||
SMS' RAM is much tighter than in the RC2014, which makes the idea of loading
|
||||
apps like zasm and ed in memory before using it a bit wasteful. In this recipe,
|
||||
we'll include zasm and ed code directly in the kernel and expose them as shell
|
||||
commands.
|
||||
|
||||
Moreover, we'll carve ourselves a little 1K memory map to put a filesystem in
|
||||
there. This will give us a nice little system that can edit small source files
|
||||
compile them and run them.
|
||||
|
||||
## Gathering parts
|
||||
|
||||
* A SMS that can run Collapse OS.
|
||||
* A [PS/2 keyboard adapter](../kbd/README.md)
|
||||
|
||||
## Build
|
||||
|
||||
There's nothing special with building this recipe. Like the base recipe, run
|
||||
`make` then copy `os.sms` to your destination medium.
|
||||
|
||||
If you look at the makefile, however, you'll see that we use a new trick here:
|
||||
we embed "apps" binaries directly in our ROM so that we don't have to load them
|
||||
in memory.
|
||||
|
||||
## Usage
|
||||
|
||||
Alright, here's what we'll do: we'll author a source file, assemble it and run
|
||||
it, *all* on your SMS! Commands:
|
||||
|
||||
Collapse OS
|
||||
> fnew 1 src
|
||||
> ed src
|
||||
: 1i
|
||||
.org 0xc200
|
||||
: 1a
|
||||
ld hl, sFoo
|
||||
: 2a
|
||||
call 0x3f
|
||||
: 3a
|
||||
xor a
|
||||
: 4a
|
||||
ret
|
||||
: 5a
|
||||
sFoo: .db "foo", 0
|
||||
: w
|
||||
> fnew 1 dest
|
||||
> fopn 0 src
|
||||
> fopn 1 dest
|
||||
> zasm 1 2
|
||||
First pass
|
||||
Second pass
|
||||
> dest
|
||||
foo>
|
||||
|
||||
Awesome right? Some precisions:
|
||||
|
||||
* Our glue code specifies a `USER_RAMSTART` of `0xc200`. This is where
|
||||
`dest` is loaded by the `pgm` shell hook.
|
||||
* `0x3f` is the offset of `printstr` in the jump table of our glue code.
|
||||
* `xor a` is for the command to report as successful to the shell.
|
||||
@ -1,187 +0,0 @@
|
||||
; TODO: This recipe has not been tested since its conversion to the BASIC shell.
|
||||
; My PS/2 adapter has been acting up and probably has a loose wire. I need to
|
||||
; fix it beore I can test this recipe on real hardware.
|
||||
; But theoretically, it works...
|
||||
|
||||
; 8K of onboard RAM
|
||||
.equ RAMSTART 0xc000
|
||||
.equ USER_CODE 0xd500
|
||||
; Memory register at the end of RAM. Must not overwrite
|
||||
.equ RAMEND 0xddd0
|
||||
|
||||
jp init
|
||||
|
||||
; *** JUMP TABLE ***
|
||||
jp strncmp
|
||||
jp upcase
|
||||
jp findchar
|
||||
jp parseHex
|
||||
jp blkSel
|
||||
jp blkSet
|
||||
jp fsFindFN
|
||||
jp fsOpen
|
||||
jp fsGetB
|
||||
jp fsPutB
|
||||
jp fsSetSize
|
||||
jp printstr
|
||||
jp _blkGetB
|
||||
jp _blkPutB
|
||||
jp _blkSeek
|
||||
jp _blkTell
|
||||
jp printcrlf
|
||||
jp stdioPutC
|
||||
jp stdioReadLine
|
||||
|
||||
.fill 0x66-$
|
||||
retn
|
||||
|
||||
.inc "err.h"
|
||||
.inc "ascii.h"
|
||||
.inc "blkdev.h"
|
||||
.inc "fs.h"
|
||||
.inc "core.asm"
|
||||
.inc "str.asm"
|
||||
|
||||
.inc "sms/kbd.asm"
|
||||
.equ KBD_RAMSTART RAMSTART
|
||||
.equ KBD_FETCHKC smskbdFetchKCB
|
||||
.inc "kbd.asm"
|
||||
|
||||
.inc "sms/vdp.asm"
|
||||
.equ GRID_RAMSTART KBD_RAMEND
|
||||
.equ GRID_COLS VDP_COLS
|
||||
.equ GRID_ROWS VDP_ROWS
|
||||
.equ GRID_SETCELL vdpSetCell
|
||||
.equ GRID_GETC kbdGetC
|
||||
.inc "grid.asm"
|
||||
|
||||
.equ STDIO_RAMSTART GRID_RAMEND
|
||||
.equ STDIO_GETC gridGetC
|
||||
.equ STDIO_PUTC gridPutC
|
||||
.inc "stdio.asm"
|
||||
|
||||
.equ MMAP_START 0xd700
|
||||
; 0x180 is to leave some space for the stack
|
||||
.equ MMAP_LEN RAMEND-MMAP_START-0x180
|
||||
.inc "mmap.asm"
|
||||
|
||||
.equ BLOCKDEV_RAMSTART STDIO_RAMEND
|
||||
.equ BLOCKDEV_COUNT 3
|
||||
.inc "blockdev.asm"
|
||||
; List of devices
|
||||
.dw mmapGetB, mmapPutB
|
||||
.dw f0GetB, f0PutB
|
||||
.dw f1GetB, f1PutB
|
||||
|
||||
|
||||
.equ FS_RAMSTART BLOCKDEV_RAMEND
|
||||
.equ FS_HANDLE_COUNT 2
|
||||
.inc "fs.asm"
|
||||
|
||||
; *** BASIC ***
|
||||
|
||||
; RAM space used in different routines for short term processing.
|
||||
.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
|
||||
.equ SCRATCHPAD FS_RAMEND
|
||||
.inc "lib/util.asm"
|
||||
.inc "lib/ari.asm"
|
||||
.inc "lib/parse.asm"
|
||||
.inc "lib/fmt.asm"
|
||||
.equ EXPR_PARSE parseLiteralOrVar
|
||||
.inc "lib/expr.asm"
|
||||
.inc "basic/util.asm"
|
||||
.inc "basic/parse.asm"
|
||||
.inc "basic/tok.asm"
|
||||
.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
|
||||
.inc "basic/var.asm"
|
||||
.equ BUF_RAMSTART VAR_RAMEND
|
||||
.inc "basic/buf.asm"
|
||||
.equ BFS_RAMSTART BUF_RAMEND
|
||||
.inc "basic/fs.asm"
|
||||
.inc "basic/blk.asm"
|
||||
.equ BAS_RAMSTART BFS_RAMEND
|
||||
.inc "basic/main.asm"
|
||||
|
||||
; USER_CODE is set according to this output below.
|
||||
.out BAS_RAMEND
|
||||
|
||||
init:
|
||||
di
|
||||
im 1
|
||||
|
||||
ld sp, RAMEND
|
||||
|
||||
; init a FS in mmap
|
||||
ld hl, MMAP_START
|
||||
ld a, 'C'
|
||||
ld (hl), a
|
||||
inc hl
|
||||
ld a, 'F'
|
||||
ld (hl), a
|
||||
inc hl
|
||||
ld a, 'S'
|
||||
ld (hl), a
|
||||
|
||||
call fsInit
|
||||
xor a
|
||||
ld de, BLOCKDEV_SEL
|
||||
call blkSel
|
||||
call fsOn
|
||||
|
||||
call kbdInit
|
||||
call gridInit
|
||||
call vdpInit
|
||||
|
||||
call basInit
|
||||
ld hl, basFindCmdExtra
|
||||
ld (BAS_FINDHOOK), hl
|
||||
jp basStart
|
||||
|
||||
basFindCmdExtra:
|
||||
ld hl, basFSCmds
|
||||
call basFindCmd
|
||||
ret z
|
||||
ld hl, basBLKCmds
|
||||
call basFindCmd
|
||||
ret z
|
||||
ld hl, .mycmds
|
||||
call basFindCmd
|
||||
ret z
|
||||
jp basPgmHook
|
||||
.mycmds:
|
||||
.db "ed", 0
|
||||
.dw 0x1f00
|
||||
.db "zasm", 0
|
||||
.dw 0x2400
|
||||
.db 0xff
|
||||
|
||||
f0GetB:
|
||||
ld ix, FS_HANDLES
|
||||
jp fsGetB
|
||||
|
||||
f0PutB:
|
||||
ld ix, FS_HANDLES
|
||||
jp fsPutB
|
||||
|
||||
f1GetB:
|
||||
ld ix, FS_HANDLES+FS_HANDLE_SIZE
|
||||
jp fsGetB
|
||||
|
||||
f1PutB:
|
||||
ld ix, FS_HANDLES+FS_HANDLE_SIZE
|
||||
jp fsPutB
|
||||
|
||||
; last time I checked, PC at this point was 0x128f. Let's give us a nice margin
|
||||
; for the start of ed.
|
||||
.fill 0x1f00-$
|
||||
.bin "ed.bin"
|
||||
|
||||
; Last check: 0x23b0
|
||||
.fill 0x2400-$
|
||||
.bin "zasm.bin"
|
||||
|
||||
FNT_DATA:
|
||||
.bin "fnt/7x7.bin"
|
||||
|
||||
.fill 0x7ff0-$
|
||||
.db "TMR SEGA", 0x00, 0x00, 0xfb, 0x68, 0x00, 0x00, 0x00, 0x4c
|
||||
@ -1,32 +0,0 @@
|
||||
.equ USER_CODE 0xc200
|
||||
; Make ed fit in SMS's memory
|
||||
.equ ED_BUF_MAXLINES 0x100
|
||||
.equ ED_BUF_PADMAXLEN 0x800
|
||||
|
||||
; Make zasm fit in SMS's memory
|
||||
.equ ZASM_REG_MAXCNT 0x80
|
||||
.equ ZASM_LREG_MAXCNT 0x10
|
||||
.equ ZASM_REG_BUFSZ 0x800
|
||||
.equ ZASM_LREG_BUFSZ 0x100
|
||||
|
||||
; *** JUMP TABLE ***
|
||||
.equ strncmp 0x03
|
||||
.equ upcase @+3
|
||||
.equ findchar @+3
|
||||
.equ parseHex @+3
|
||||
.equ blkSel @+3
|
||||
.equ blkSet @+3
|
||||
.equ fsFindFN @+3
|
||||
.equ fsOpen @+3
|
||||
.equ fsGetB @+3
|
||||
.equ fsPutB @+3
|
||||
.equ fsSetSize @+3
|
||||
.equ printstr @+3
|
||||
.equ _blkGetB @+3
|
||||
.equ _blkPutB @+3
|
||||
.equ _blkSeek @+3
|
||||
.equ _blkTell @+3
|
||||
.equ printcrlf @+3
|
||||
.equ stdioPutC @+3
|
||||
.equ stdioReadLine @+3
|
||||
|
||||
Loading…
Reference in New Issue
Block a user