Searching for vt52fix.prg

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Patrice Mandin
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Searching for vt52fix.prg

Post by Patrice Mandin »

Hello,

I just noticed there were some bugs in Falcon VT52 emulator (after 15 years :)), and for example the vt52 demo http://pouet.net/prod.php?which=13060 does not show anything on Falcon.

Thomas Binder (Thing author) did the small vt52fix.prg program, and so I would like to try it, but can not find it.

So if anyone has any link or info where I could find it (or any other similar program that patches Falcon VT52 emulator), thanks.
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Patrice Mandin
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Re: Searching for vt52fix.prg

Post by Patrice Mandin »

Problem solved!

VT52 emulation was rewritten for CT60 (the code is in Flash), however there was a bug when changing the background color in 1.03c firmware, and it is fixed in 1.04. I backported the bugfix to 1.03c, and it's ok now :D (the new 1.03c firmware is available on my site).
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Re: Searching for vt52fix.prg

Post by [ProToS] »

thanks for sharing this info
SeeU
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Patrice Mandin
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Re: Searching for vt52fix.prg

Post by Patrice Mandin »

Just a note for people interested:

Changing background color for text in TOS 4 works, but only in True Color mode. While disassembling the TOS for this VT52 routine, I understood why.
Atari added extra Line-A variables for True Colour mode at offsets $b0e and $b0a; at a different place than the ones for bitplanes modes which are at offsets -$24 (foreground color) and -$26 (background color).
When you change the background color, the TOS only changes the ones for True Colour mode, but Atari forgot to change the ones for bitplanes modes.
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