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try to fix IIc+ VBL

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This commit is contained in:
Peter Ferrie 2020-03-17 19:46:01 -07:00
parent 7c1184275d
commit 1803967a9e
2 changed files with 5 additions and 2 deletions
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3
src/hw.vbl.a
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@ -16,8 +16,9 @@ WaitForVBL_iie ; IIe/IIgs have a relatively sane VBL
- bit $C019
patch_VBL_iigs1
bpl -
patch_VBL_iic
patch_VBL_iic1
- lda $C019 ; $c019 bit 7 is sticky, reset it (SMC->#$70 for IIc)
patch_VBL_iic2
patch_VBL_iigs2
bmi -
WaitForVBL_nop ; II/II+ have no easy VBL

4
src/hw.vbl.init.a
View File

@ -37,7 +37,9 @@ BuildVBLFunction
rts
@build_iic
lda #$70
sta patch_VBL_iic+1
sta patch_VBL_iic1+1
lda #$60
sta patch_VBL_iic2
lda #$EA
sta UnwaitForVBL
rts