collapseos/recipes/rc2014/glue.asm

; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module
; The RAM module is selected on A15, so it has the range 0x8000-0xffff
.equ	RAMSTART	0x8000
.equ	RAMEND		0xffff
.equ	ACIA_CTL	0x80	; Control and status. RS off.
.equ	ACIA_IO		0x81	; Transmit. RS on.

jp	init

; interrupt hook
.fill	0x38-$
jp	aciaInt

.inc "err.h"
.inc "ascii.h"
.inc "core.asm"
.inc "str.asm"
.equ	ACIA_RAMSTART	RAMSTART
.inc "acia.asm"

.equ	STDIO_RAMSTART	ACIA_RAMEND
.equ	STDIO_GETC	aciaGetC
.equ	STDIO_PUTC	aciaPutC
.inc "stdio.asm"

; *** Shell ***
.inc "lib/util.asm"
.inc "lib/parse.asm"
.inc "lib/args.asm"
.inc "lib/stdio.asm"
.equ	SHELL_RAMSTART	STDIO_RAMEND
.equ	SHELL_EXTRA_CMD_COUNT 0
.inc "shell/main.asm"

init:
	di
	; setup stack
	ld	hl, RAMEND
	ld	sp, hl
	im 1

	call	aciaInit
	call	shellInit
	ei
	jp	shellLoop
Move RC2014 recipe in its own folder Also, remove `parts/platforms`. It makes no sense. Only recipes make sense. 2019-04-17 01:50:16 +10:00			`; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module`
			`; The RAM module is selected on A15, so it has the range 0x8000-0xffff`
Use zasm in recipes 2019-05-21 01:00:14 +10:00			`.equ RAMSTART 0x8000`
			`.equ RAMEND 0xffff`
			`.equ ACIA_CTL 0x80 ; Control and status. RS off.`
			`.equ ACIA_IO 0x81 ; Transmit. RS on.`
Move RC2014 recipe in its own folder Also, remove `parts/platforms`. It makes no sense. Only recipes make sense. 2019-04-17 01:50:16 +10:00
stdio: de-macro-ize 2019-05-17 22:14:19 +10:00			`jp init`
Move RC2014 recipe in its own folder Also, remove `parts/platforms`. It makes no sense. Only recipes make sense. 2019-04-17 01:50:16 +10:00
			`; interrupt hook`
			`.fill 0x38-$`
			`jp aciaInt`

zasm: rename #inc to .inc scas, it's not needed any more. 2019-10-07 05:32:23 +11:00			`.inc "err.h"`
Move ASCII consts to ascii.h And made them shorter in name. The new ascii.h file allow reuse in userspace code. 2019-11-14 12:38:06 +11:00			`.inc "ascii.h"`
zasm: rename #inc to .inc scas, it's not needed any more. 2019-10-07 05:32:23 +11:00			`.inc "core.asm"`
Extract str.asm from core.asm and make core included by userspace Most of register fiddling routines (which is now the only thing contained in care.asm) are used by almost all userspace apps, often in inner loops. That makes the penalty of using jump tables for those a bit too high. Moreover, it burdens jump tables needlessly. Because this unit is very small (now that string routines are out), it makes sense to always include it in binaries. 2019-11-15 01:55:31 +11:00			`.inc "str.asm"`
Use zasm in recipes 2019-05-21 01:00:14 +10:00			`.equ ACIA_RAMSTART RAMSTART`
zasm: rename #inc to .inc scas, it's not needed any more. 2019-10-07 05:32:23 +11:00			`.inc "acia.asm"`
stdio: de-macro-ize 2019-05-17 22:14:19 +10:00
shell/stdio: decouple from blkdev (again) Move load/save to blkdev_cmds and add a new "poke" builtin shell cmd that is the mirror of "peek" and strictly uses stdio (no blkdev involved). This allows us to slim the minimal OS size but, more importantly, change the behavior of "load" so that we don't expect GetC to block until Z is set. This way, using "load X" with X being larger than the blkdev size won't block forever. This also brings our RC2014 minimal kernel below the 1K mark again. 2019-06-03 00:50:18 +10:00			`.equ STDIO_RAMSTART ACIA_RAMEND`
stdio: remove a layer of indirection in GetC/PutC We use zasm's ability to use labels in .equ directive. We didn't do it before because for a while, we were in between scas and zasm (scas was used in automated tests) so we needed to use the lowest common denominator: zasm doesn't have macros and scas can't use labels in .equ directives. This forced us to add this layer of indirection. But now that we are completely cut from scas' dependency, we can use this nice zasm's ability. 2019-11-05 01:55:12 +11:00			`.equ STDIO_GETC aciaGetC`
			`.equ STDIO_PUTC aciaPutC`
zasm: rename #inc to .inc scas, it's not needed any more. 2019-10-07 05:32:23 +11:00			`.inc "stdio.asm"`
stdio: de-macro-ize 2019-05-17 22:14:19 +10:00
Make the shell a userspace app That's my mega-commit you've all been waiting for. The code for the shell share more routines with userspace apps than with kernel units, because, well, its behavior is that of a userspace app, not a device driver. This created a weird situation with libraries and jump tables. Some routine belonging to the `kernel/` directory felt weird there. And then comes `apps/basic`, which will likely share even more code with the shell. I was seeing myself creating huge jump tables to reuse code from the shell. It didn't feel right. Moreover, we'll probably want basic-like apps to optionnally replace the shell. So here I am with this huge change in the project structure. I didn't test all recipes on hardware yet, I will do later. I might have broken some... But now, the structure feels better and the line between what belongs to `kernel` and what belongs to `apps` feels clearer. 2019-11-16 07:37:49 +11:00			`; * Shell *`
			`.inc "lib/util.asm"`
			`.inc "lib/parse.asm"`
			`.inc "lib/args.asm"`
			`.inc "lib/stdio.asm"`
Use zasm in recipes 2019-05-21 01:00:14 +10:00			`.equ SHELL_RAMSTART STDIO_RAMEND`
pgm: new kernel module The pgm module implements a shell hook so that when an unknown command is typed, we look into the mounted filesystem and look for a file with the same name as the command. If we find one, we load it in memory and run it. 2019-06-01 04:50:43 +10:00			`.equ SHELL_EXTRA_CMD_COUNT 0`
Make the shell a userspace app That's my mega-commit you've all been waiting for. The code for the shell share more routines with userspace apps than with kernel units, because, well, its behavior is that of a userspace app, not a device driver. This created a weird situation with libraries and jump tables. Some routine belonging to the `kernel/` directory felt weird there. And then comes `apps/basic`, which will likely share even more code with the shell. I was seeing myself creating huge jump tables to reuse code from the shell. It didn't feel right. Moreover, we'll probably want basic-like apps to optionnally replace the shell. So here I am with this huge change in the project structure. I didn't test all recipes on hardware yet, I will do later. I might have broken some... But now, the structure feels better and the line between what belongs to `kernel` and what belongs to `apps` feels clearer. 2019-11-16 07:37:49 +11:00			`.inc "shell/main.asm"`
stdio: de-macro-ize 2019-05-17 22:14:19 +10:00
Move RC2014 recipe in its own folder Also, remove `parts/platforms`. It makes no sense. Only recipes make sense. 2019-04-17 01:50:16 +10:00			`init:`
			`di`
			`; setup stack`
			`ld hl, RAMEND`
			`ld sp, hl`
			`im 1`
stdio: de-macro-ize 2019-05-17 22:14:19 +10:00
Move RC2014 recipe in its own folder Also, remove `parts/platforms`. It makes no sense. Only recipes make sense. 2019-04-17 01:50:16 +10:00			`call aciaInit`
			`call shellInit`
			`ei`
			`jp shellLoop`