[Coco] Bug in VCC ???

[Bill Pierce]

I jut tried it on my Coco 3. It seems to be running fine. A little slow (expected), but running.
I agree it's most likely a VCC bug. I've had a few strange things happen in VCC in certain programs but I can never pin them down to what's causing them. Usually, it's in direct GIME access, but this seems to be, as you said, something not being set right in the registers. I've never run into this before as all "register" manipulation I've done in C and ASM has always worked.

BTW... Now you got me playing Zork 1 :-P


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 12:44 pm
Subject: Re: [Coco] Bug in VCC ???


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
> https://sites.google.com/site/dabarnstudio/
> Co-Webmaster of The TRS-80 Color Computer Archive
> http://www.colorcomputerarchive.com/
> Co-Contributor, Co-Editor for CocoPedia
> http://www.cocopedia.com/wiki/index.php/Main_Page
> E-Mail: ooogalapasooo at aol.com
>
>
>
>
> -----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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