[Coco] Bug in VCC ???
ooogalapasooo at aol.com
Wed Apr 16 12:42:57 EDT 2014
Luis, I tried it i VCC 1.4.3beta and I get the CPM logo, then it seems to scroll one line at a time but no text displays for at least a screen of lines, then ending in a:
--------------------- More --------------------
prompt. Hitting any key makes it scroll more, same results.
I tried it again in VCC 1.4.3beta+FSTEST1 (Aaron's latest patch) and it did the same thing. The same also happens in Vcc 1.4.2
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E-Mail: ooogalapasooo at aol.com
From: Luis Antoniosi (CoCoDemus) <retrocanada76 at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Wed, Apr 16, 2014 12:16 pm
Subject: [Coco] Bug in VCC ???
I noticed the VCC 1.43beta won't run my cpm emulator running zork1.com properly.
It seem to get a wrong conditional jump and goes crazy scrolling the screen up.
The same image DOES work on MESS and a real Coco3. The Mbasic.com
seemed at beginning to work fine.
I'm using a direct lookup table to convert 6809 flags to Z-80 flags.
So it could be the case some instruction setting or resetting a wrong
I have no clue which instruction is that since I don't use VCC (it
does not have a debugger it has no purpose for me).
The cpm disks:
Mount zork.os9 (80T disk image) and run
And you will see the bug right away.
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