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rc2014/ps2: update recipe to Forth's Collapse OS

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This commit is contained in:
Virgil Dupras 2020-05-21 09:09:13 -04:00
parent e9e3bd80f6
commit b06cf09754
3 changed files with 17 additions and 90 deletions
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27
recipes/rc2014/ps2/Makefile
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@ -1,27 +0,0 @@
PROGNAME = ps2ctl
AVRDUDEMCU ?= t45
AVRDUDEARGS ?= -c usbtiny -P usb
TARGETS = $(PROGNAME).hex os.bin
BASEDIR = ../../..
ZASM = $(BASEDIR)/emul/zasm/zasm
KERNEL = $(BASEDIR)/kernel
APPS = $(BASEDIR)/apps
# Rules
.PHONY: send all clean
all: $(TARGETS)
@echo Done!
send: $(PROGNAME).hex
avrdude $(AVRDUDEARGS) -p $(AVRDUDEMCU) -U flash:w:$(PROGNAME).hex
$(PROGNAME).hex: $(PROGNAME).asm
avra -o $@ $(PROGNAME).asm
os.bin: glue.asm
$(ZASM) $(KERNEL) $(APPS) < glue.asm > $@
clean:
rm -f $(TARGETS) *.eep.hex *.obj os.bin

21
recipes/rc2014/ps2/README.md
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@ -61,10 +61,23 @@ probably have gone the flip-flop way. Seems more solid.
## Using the PS/2 interface
After having built and flashed the `glue.asm` supplied with this recipe, you end
up with a shell driven by the PS/2 keyboard (but it still outputs to ACIA).
To use this interface, you have to build a new Collapse OS binary. We'll use
the xcomp unit from the base recipe and modify it.
There are still a few glitches, especially at initialization or at connect and
disconnect, but it otherwise works rather well!
First, we need a `(ps2kc)` routine. In this case, it's easy, it's
`: (ps2kc) 8 PC@ ;`. Add this after ACIA loading. Then, we can load PS/2
subsystem. You add `411 414 LOADR`. Then, at initialization, you add `PS2$`
after `ACIA$`. You also need to define `PS2_MEM` at the top. You can probably
use `RAMSTART + 0x7a`.
Rebuild, reflash, should work. For debugging purposes, you might not want to
go straight to plugging PS/2 `(key)` into the system. What I did myself was
to load the PS/2 subsystem *before* ACIA (which overrides with its own `(key)`)
and added a dummy word in between to access PS/2's key.
Also (and this is a TODO: investigate), I had a problem where the break key I
got from `(ps2kc)` was 0x70 instead of 0xf0 which had the effect of duplicating
all my keystrokes. I added a 0x70 -> 0xf0 replacement in my version of
`(ps2kc)`. Does the trick (at the cost of a non-functional numpad 0).
[avra]: https://github.com/hsoft/avra

59
recipes/rc2014/ps2/glue.asm
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@ -1,59 +0,0 @@
.equ RAMSTART 0x8000
.equ RAMEND 0xffff
.equ ACIA_CTL 0x80 ; Control and status. RS off.
.equ ACIA_IO 0x81 ; Transmit. RS on.
.equ KBD_PORT 0x08
jp init
.inc "err.h"
.inc "ascii.h"
.inc "core.asm"
.inc "str.asm"
.equ ACIA_RAMSTART RAMSTART
.inc "acia.asm"
.equ KBD_RAMSTART ACIA_RAMEND
.inc "kbd.asm"
.equ STDIO_RAMSTART KBD_RAMEND
.equ STDIO_GETC kbdGetC
.equ STDIO_PUTC aciaPutC
.inc "stdio.asm"
; *** BASIC ***
; RAM space used in different routines for short term processing.
.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
.equ SCRATCHPAD STDIO_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 BAS_RAMSTART BUF_RAMEND
.inc "basic/main.asm"
init:
di
ld sp, RAMEND
im 1
call aciaInit
call kbdInit
call basInit
ei
jp basStart
KBD_FETCHKC:
in a, (KBD_PORT)
ret