[Coco] Bug in VCC ???

[Luis Antoniosi (CoCoDemus)]

That's the bug. Try it on MESS or any real coco.


On Wed, Apr 16, 2014 at 12:42 PM, Bill Pierce <ooogalapasooo at aol.com> wrote:

>
> 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
>
>
> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
>
>
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
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>
>
>
>
> -----Original Message-----
> 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.comproperly.
>
> 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
> flag.
>
> 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:
>
>
> https://sites.google.com/site/tandycocoloco/dropbox/cpm-os9.zip?attredirects=0&d=1
>
> Mount zork.os9 (80T disk image) and run
>
> /d1/cpm zork1.com
>
> And you will see the bug right away.
>
>
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