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Changed the order in which lo/hi bytes of vdc addr are set according to willimanilys ((z64k) suggestions. Changed offset for vdc ramsize detection from 000 to 000.

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mc78 2019-12-01 13:25:14 +01:00 committed by greg-king5
parent 390878e831
commit 244dc358e5
1 changed files with 12 additions and 10 deletions
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22
libsrc/c128/emd/c128-vdc.s
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@ -104,7 +104,7 @@ INSTALL:
lda ptr2
cmp ptr2+1
bne @have64k
lda #64 ; assumes x = 0, here -> p.c = 64
bne @setpagecnt
@have64k:
@ -113,22 +113,25 @@ INSTALL:
@setpagecnt:
sta pagecount
stx pagecount+1
txa
bne @keep64kBit
ldx #VDC_CSET ; restore 16/64k flag
lda vdc_cset_save
jsr vdcputreg
jsr vdcputreg
@keep64kBit:
lda #<EM_ERR_OK
ldx #>EM_ERR_OK
rts
test64k:
sta tmp3
sta tmp1
sty ptr3
lda #0
sta ptr3+1
jsr settestadr1
lda tmp3
lda tmp1
jsr vdcputbyte ; write $55
jsr settestadr1
jsr vdcgetbyte ; read here
@ -146,7 +149,7 @@ settestadr1:
ldy #$02 ; test page 2 (here)
.byte $2c
settestadr2:
ldy #$42 ; or page 64+2 (there)
ldy #$82 ; or page 64+2 (there)
lda #0
jmp vdcsetsrcaddr
@ -334,17 +337,16 @@ COPYTO:
;
vdcsetsrcaddr:
ldx #VDC_DATA_LO
ldx #VDC_DATA_HI
stx VDC_ADDR_REG
@L0: bit VDC_ADDR_REG
bpl @L0
sta VDC_DATA_REG
dex
tya
inx
stx VDC_ADDR_REG
@L1: bit VDC_ADDR_REG ; XXX: Test waiting for register 18
bpl @L1
sta VDC_DATA_REG
sty VDC_DATA_REG
rts
vdcgetbyte: