129 lines
1.8 KiB
NASM
129 lines
1.8 KiB
NASM
;;fshvarset
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;;Sets a Word in FshVars.
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;;Inputs:
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;; HL: 16b
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;; DE: Destination Word Relitive to FshVars
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fshvarset:
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push bc
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ld bc, FshVarsSize / 2 - 1
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call cpBCDE
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pop bc
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jr c, fshvarsetOOBException
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push bc
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push de
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push hl
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ld bc, FshVars
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ex de, hl
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add hl, hl
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add hl, bc
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ld (hl), e
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inc hl
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ld (hl), d
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pop hl
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pop de
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pop bc
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ret
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fshvarsetOOBException:
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push hl
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ld hl, ErrOutOfBoundso
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call ErrSet
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pop hl
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ret
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;;fshvarget
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;;Gets a Word in FshVars.
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;;Inputs:
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;; DE: Destination Word Relitive to FshVars
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;;Outputs:
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;; HL: Word in (DE)
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fshvarget:
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push bc
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ld bc, FshVarsSize / 2 - 1
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call cpBCDE
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pop bc
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jr c, fshvargetOOBException
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push bc
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push de
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ld hl, 0
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ld bc, FshVars
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ex de, hl
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add hl, hl
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add hl, bc
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ld e, (hl)
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inc hl
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ld d, (hl)
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ex de, hl
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pop de
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pop bc
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ret
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fshvargetOOBException:
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push hl
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ld hl, ErrOutOfBoundso
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call ErrSet
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pop hl
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ret
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;;fshvarcpy
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;;Copies a word.
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;;Inputs:
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;; HL: Byte pointer
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;; DE: Destination
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fshvarcpy:
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push bc
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ld bc, FshVarsSize / 2 - 1
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call cpBCDE
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pop bc
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jr c, fshvarcpyOOBException
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push bc
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ld bc, FshVarsSize / 2
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call cpHLBC
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pop bc
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jr nc, fshvarcpyOOBException
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push de
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push hl
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ld bc, FshVarsSize / 2
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call cpBCDE
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jr c, fshvarcpyOOBException
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ld bc, FshVars
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add hl, hl
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add hl, bc
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ex de, hl
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add hl, hl
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add hl, bc
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ld a, (de)
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ld (hl), a
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inc de
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inc hl
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ld a, (de)
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ld (hl), a
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pop hl
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pop de
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ret
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fshvarcpyOOBException:
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push hl
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ld hl, ErrOutOfBoundso
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call ErrSet
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pop hl
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ret
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;;fshvarreset
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;;Fills fshvars with $00
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fshvarreset:
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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, 0
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fshvarfillLoop:
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call fshvarset
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inc b
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inc de
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ld a, b
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cp FshVarsSize / 2
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jr c, fshvarfillLoop
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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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