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zasm: can now assemble the shell!

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This commit is contained in:
Virgil Dupras 2019-05-17 19:36:32 -04:00
parent d58cf122a8
commit a3d3e0ce37
2 changed files with 17 additions and 17 deletions
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28
parts/z80/shell.asm
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@ -26,40 +26,40 @@
; *** CONSTS ***
; number of entries in shellCmdTbl
SHELL_CMD_COUNT .equ 7+SHELL_EXTRA_CMD_COUNT
.equ SHELL_CMD_COUNT 7+SHELL_EXTRA_CMD_COUNT
; maximum number of bytes to receive as args in all commands. Determines the
; size of the args variable.
SHELL_CMD_ARGS_MAXSIZE .equ 3
.equ SHELL_CMD_ARGS_MAXSIZE 3
; The command that was type isn't known to the shell
SHELL_ERR_UNKNOWN_CMD .equ 0x01
.equ SHELL_ERR_UNKNOWN_CMD 0x01
; Arguments for the command weren't properly formatted
SHELL_ERR_BAD_ARGS .equ 0x02
.equ SHELL_ERR_BAD_ARGS 0x02
; IO routines (GetC, PutC) returned an error in a load/save command
SHELL_ERR_IO_ERROR .equ 0x05
.equ SHELL_ERR_IO_ERROR 0x05
; Size of the shell command buffer. If a typed command reaches this size, the
; command is flushed immediately (same as pressing return).
SHELL_BUFSIZE .equ 0x20
.equ SHELL_BUFSIZE 0x20
; *** VARIABLES ***
; Memory address that the shell is currently "pointing at" for peek, load, call
; operations. Set with mptr.
SHELL_MEM_PTR .equ SHELL_RAMSTART
.equ SHELL_MEM_PTR SHELL_RAMSTART
; Places where we store arguments specifiers and where resulting values are
; written to after parsing.
SHELL_CMD_ARGS .equ SHELL_MEM_PTR+2
.equ SHELL_CMD_ARGS SHELL_MEM_PTR+2
; Command buffer. We read types chars into this buffer until return is pressed
; This buffer is null-terminated and we don't keep an index around: we look
; for the null-termination every time we write to it. Simpler that way.
SHELL_BUF .equ SHELL_CMD_ARGS+SHELL_CMD_ARGS_MAXSIZE
.equ SHELL_BUF SHELL_CMD_ARGS+SHELL_CMD_ARGS_MAXSIZE
SHELL_RAMEND .equ SHELL_BUF+SHELL_BUFSIZE
.equ SHELL_RAMEND SHELL_BUF+SHELL_BUFSIZE
; *** CODE ***
shellInit:
@ -178,8 +178,7 @@ shellParse:
; let's have DE point to the jump line
ld a, SHELL_CMD_ARGS_MAXSIZE
call addDE
ld ixh, d
ld ixl, e
push ix \ pop de
; Ready to roll!
call callIX
cp 0
@ -467,10 +466,7 @@ shellCall:
; 2. our A arg as the first byte of (HL)
; 2. our HL arg as (HL+1) and (HL+2)
; Ready, set, go!
ld a, (SHELL_MEM_PTR)
ld ixl, a
ld a, (SHELL_MEM_PTR+1)
ld ixh, a
ld ix, (SHELL_MEM_PTR)
ld a, (hl)
ex af, af'
inc hl

6
tools/tests/zasm/test6.asm
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@ -12,5 +12,9 @@
#include "blockdev.asm"
.dw aciaGetC, aciaPutC, 0, 0
.equ STDIO_RAMSTART BLOCKDEV_RAMEND
.equ STDIO_RAMSTART BLOCKDEV_RAMEND
#include "stdio.asm"
.equ SHELL_RAMSTART STDIO_RAMEND
.equ SHELL_EXTRA_CMD_COUNT 0
#include "shell.asm"