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Fix pushing/popping at the limits of the stack segment

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This commit is contained in:
Jeff Parsons 2015-06-02 15:39:13 -07:00
commit badaaa307e
2 changed files with 6 additions and 7 deletions
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blog/2015/06/01/README.md
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@ -39,7 +39,7 @@ The Video component installs I/O port handlers for all possible I/O ranges; when
associated I/O operations are redirected to a dummy Card, so that the active Card isn't affected. Here,
however, that was insufficient. If the VGA is the only installed video card, the VGA ROM expects *NO RESPONSE*
on inactive CRTC ports. So I've changed the CRTC I/O handlers to check the Card's fActive flag. This seems
like a safe and logical change, but we'll still have to check for backward-compatibility issues with older ROMs.
like a safe and logical change, but I still have to check for backward-compatibility issues with older ROMs.
The VGA ROM programs the card for the first time here: