VICE / Patches / #356 Emulate register 27 quirk of VDC revision 0

#356 Emulate register 27 quirk of VDC revision 0

Milestone: v3.x

Status: open-wip

Owner: Marco van den Heuvel

Labels: None

Category: bugfix

Updated: 2023-11-26

Created: 2023-03-13

Creator: Marco Baye

Private: No

Hi!
Recently I had a chance to run a test program (see https://github.com/marcobaye/cbmtestprgs/raw/master/vdc/vdc-interactive.prg) on a rev0 VDC, because I wanted to investigate the xscroll issue. Turns out its register 27 behaves differently from rev1 and rev2, which seems to have never been documented yet.
Patch is attached.
Patches for xscroll/yscroll will take a while, because scrolling on rev0 is basically totally shot.

1 Attachments

vdc0fix.diff

Discussion

gpz - 2023-03-26

assigned_to: Marco van den Heuvel
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gpz - 2023-11-26

applied in r44793 - leaving open for the other patches :)

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gpz - 2023-11-26

status: open --> open-wip
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Emulate register 27 quirk of VDC revision 0

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#356 Emulate register 27 quirk of VDC revision 0

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