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loadbank.asm
62 lines (57 loc) · 1.28 KB
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loadbank.asm
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.include "x16.inc"
.include "bankparams.asm"
loadbank:
lda #0
sta ROM_BANK
lda #1
ldx #1
ldy #0
jsr SETLFS ; SetFileParams(LogNum=1,DevNum=1,SA=0)
lda #<bankparams
sta ZP_PTR_1
lda #>bankparams
sta ZP_PTR_1+1
ldx #0
@loop:
cpx #BANKS_TO_LOAD
beq end_loadbank
stx RAM_BANK
phx
jsr @load ; load bank
pla
tax
inx
jmp @loop
@load: ; load banked RAM using params starting at ZP_PTR_1
lda (ZP_PTR_1)
pha ; push filename length to stack
jsr @inczp1
lda (ZP_PTR_1)
pha ; push filename address low byte to stack
jsr @inczp1
lda (ZP_PTR_1)
tay ; Y = filename address high byte
jsr @inczp1
plx ; pull filename address low byte from stack to X
pla ; pull filename length from stack to A
beq @load_return
jsr SETNAM ; SetFileName(filename)
lda #0
ldx #<RAM_WIN
ldy #>RAM_WIN
jsr LOAD ; LoadFile(Verify=0,Address=RAM_WIN)
@load_return:
rts
@inczp1: ; increment ZP_PTR_1
pha ; push A to stack
lda #1
clc
adc ZP_PTR_1
sta ZP_PTR_1
lda #0
adc ZP_PTR_1+1
sta ZP_PTR_1+1
pla ; pull A back from stack
rts
end_loadbank:
rts