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Bug #54
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GTIA issue when Turbo > 4X
Bug #54:
GTIA issue when Turbo > 4X
Status:
Closed
Priority:
High
Assignee:
-
Start date:
07/02/2017
Due date:
% Done:
0%
Estimated time:
Description
I'm attaching a BASIC listing of a PMG test program I wrote to assist in diagnosing an issue with the 1088XEL. For fun, I tried running it with the various Turbo speeds. 1, 2, 4 work perfectly. 8, 16, 32 display issues as shown in the linked Youtube video.
Using any BASIC, ENTER the attached program (this is text, not tokenized, so use ENTER, not LOAD). run it at 4X, then run it at 8X. It's like GTIA is fetching data at the wrong clock cycle.
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