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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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This commit is contained in:
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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18
libsrc/c128/emd/c128-vdc.s
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@@ -114,21 +114,24 @@ INSTALL:
sta pagecount sta pagecount
stx pagecount+1 stx pagecount+1
txa
bne @keep64kBit
ldx #VDC_CSET ; restore 16/64k flag ldx #VDC_CSET ; restore 16/64k flag
lda vdc_cset_save lda vdc_cset_save
jsr vdcputreg jsr vdcputreg
@keep64kBit:
lda #<EM_ERR_OK lda #<EM_ERR_OK
ldx #>EM_ERR_OK ldx #>EM_ERR_OK
rts rts
test64k: test64k:
sta tmp3 sta tmp1
sty ptr3 sty ptr3
lda #0 lda #0
sta ptr3+1 sta ptr3+1
jsr settestadr1 jsr settestadr1
lda tmp3 lda tmp1
jsr vdcputbyte ; write $55 jsr vdcputbyte ; write $55
jsr settestadr1 jsr settestadr1
jsr vdcgetbyte ; read here jsr vdcgetbyte ; read here
@@ -146,7 +149,7 @@ settestadr1:
ldy #$02 ; test page 2 (here) ldy #$02 ; test page 2 (here)
.byte $2c .byte $2c
settestadr2: settestadr2:
ldy #$42 ; or page 64+2 (there) ldy #$82 ; or page 64+2 (there)
lda #0 lda #0
jmp vdcsetsrcaddr jmp vdcsetsrcaddr
@@ -334,17 +337,16 @@ COPYTO:
; ;
vdcsetsrcaddr: vdcsetsrcaddr:
ldx #VDC_DATA_LO ldx #VDC_DATA_HI
stx VDC_ADDR_REG stx VDC_ADDR_REG
@L0: bit VDC_ADDR_REG @L0: bit VDC_ADDR_REG
bpl @L0 bpl @L0
sta VDC_DATA_REG sta VDC_DATA_REG
dex inx
tya
stx VDC_ADDR_REG stx VDC_ADDR_REG
@L1: bit VDC_ADDR_REG ; XXX: Test waiting for register 18 @L1: bit VDC_ADDR_REG ; XXX: Test waiting for register 18
bpl @L1 bpl @L1
sta VDC_DATA_REG sty VDC_DATA_REG
rts rts
vdcgetbyte: vdcgetbyte: