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zasm emul: hook fsdev in glue code

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This commit is contained in:
Virgil Dupras 2019-05-16 13:23:23 -04:00
parent df67a38f81
commit e18879fcb2
2 changed files with 57 additions and 18 deletions
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55
tools/emul/zasm_glue.asm
View File

@ -3,8 +3,10 @@
.equ USER_CODE 0x4800
.equ STDIO_PORT 0x00
.equ STDIN_SEEK 0x01
.equ FS_DATA_PORT 0x02
.equ FS_SEEK_PORT 0x03
jr init ; 2 bytes
jp init ; 3 bytes
; *** JUMP TABLE ***
jp strncmp
jp addDE
@ -17,11 +19,28 @@ jp findchar
jp parseHexPair
jp blkSel
#include "core.asm"
.equ BLOCKDEV_RAMSTART RAMSTART
.equ BLOCKDEV_COUNT 3
#include "blockdev.asm"
; List of devices
.dw emulGetC, 0, emulSeek, emulTell
.dw 0, emulPutC, 0, 0
.dw fsdevGetC, fsdevPutC, fsdevSeek, fsdevTell
.equ FS_RAMSTART BLOCKDEV_RAMEND
.equ FS_HANDLE_COUNT 0
#include "fs.asm"
init:
di
; We put the stack at the end of the kernel memory
ld hl, USER_CODE-1
ld sp, hl
ld a, 2 ; select fsdev
ld de, BLOCKDEV_GETC
call blkSel
call fsOn
ld h, 0 ; input blkdev
ld l, 1 ; output blkdev
call USER_CODE
@ -59,10 +78,30 @@ emulTell:
ld l, a
ret
#include "core.asm"
.equ BLOCKDEV_RAMSTART RAMSTART
.equ BLOCKDEV_COUNT 2
#include "blockdev.asm"
; List of devices
.dw emulGetC, 0, emulSeek, emulTell
.dw 0, emulPutC, 0, 0
fsdevGetC:
in a, (FS_DATA_PORT)
cp a ; ensure Z
ret
fsdevPutC:
out (FS_DATA_PORT), a
ret
fsdevSeek:
push af
ld a, l
out (FS_SEEK_PORT), a
ld a, h
out (FS_SEEK_PORT), a
pop af
ret
fsdevTell:
push af
in a, (FS_SEEK_PORT)
ld l, a
in a, (FS_SEEK_PORT)
ld h, a
pop af
ret

20
tools/emul/zasm_user.asm
View File

@ -1,14 +1,14 @@
; *** JUMP TABLE ***
JUMP_STRNCMP .equ 0x02
JUMP_ADDDE .equ 0x05
JUMP_ADDHL .equ 0x08
JUMP_UPCASE .equ 0x0b
JUMP_UNSETZ .equ 0x0e
JUMP_INTODE .equ 0x11
JUMP_INTOHL .equ 0x14
JUMP_FINDCHAR .equ 0x17
JUMP_PARSEHEXPAIR .equ 0x1a
JUMP_BLKSEL .equ 0x1d
JUMP_STRNCMP .equ 0x03
JUMP_ADDDE .equ 0x06
JUMP_ADDHL .equ 0x09
JUMP_UPCASE .equ 0x0c
JUMP_UNSETZ .equ 0x0f
JUMP_INTODE .equ 0x12
JUMP_INTOHL .equ 0x15
JUMP_FINDCHAR .equ 0x18
JUMP_PARSEHEXPAIR .equ 0x1b
JUMP_BLKSEL .equ 0x1e
.equ USER_CODE 0x4800
.equ RAMSTART 0x5800