113 lines
1.5 KiB
NASM
113 lines
1.5 KiB
NASM
;;fshcmddecode
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;;Decodes all commands.
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;;Inputs:
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;; HL: Cmd String mem loc
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;; DE: Op code mem loc
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;;Output:
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;; Sets (DE) with command op code
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fshcmddecode:
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push hl
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push de
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ld de, fshcmdEXIT
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call strcmp
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ld hl, fshcmdEXITo
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pop de
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call z, bytecpy
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pop hl
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push hl
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push de
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ld de, fshcmdSET
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call strcmp
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ld hl, fshcmdSETo
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pop de
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call z, bytecpy
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pop hl
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push hl
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push de
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ld de, fshcmdCOPY
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call strcmp
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ld hl, fshcmdCOPYo
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pop de
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call z, bytecpy
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pop hl
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push hl
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push de
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ld de, fshcmdVARS
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call strcmp
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ld hl, fshcmdVARSo
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pop de
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call z, bytecpy
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pop hl
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push hl
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push de
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ld de, fshcmdCLS
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call strcmp
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ld hl, fshcmdCLSo
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pop de
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call z, bytecpy
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pop hl
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ret
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;;fshcmdroute
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;;Routes all commamds.
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;;Inputs:
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;; HL: Op code mem loc
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;;Outputs:
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;; Jp to loc for cmd func
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;; ult go to Fin
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fshcmdroute:
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ld de, fshcmdEXITo
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call bytecmp
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jp z, fshcmdEXITf
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ld de, fshcmdSETo
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call bytecmp
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jp z, fshcmdSETf
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ld de, fshcmdCOPYo
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call bytecmp
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jp z, fshcmdCOPYf
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ld de, fshcmdVARSo
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call bytecmp
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jp z, fshcmdVARSf
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ld de, fshcmdCLSo
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call bytecmp
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jp z, fshcmdCLSf
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ld hl, FshCmdErrCode
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ld (hl), $01
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jp Err
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; fshvarfill
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;; fills fshcmd with byte
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;; Inputs:
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;; C: byte
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fshcmdfill:
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push hl
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push bc
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push de
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ld b, 0
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ld de, 0
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ld hl, FshCmd
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fshcmdfillLoop:
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ld (hl), c
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inc hl
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inc b
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inc de
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ld a, b
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cp FshCmdSize
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jr c, fshcmdfillLoop
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pop de
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pop bc
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pop hl
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ret
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#include "includes/FshCommands.inc"
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