[Coco] Bug in VCC ???

[Luis Antoniosi (CoCoDemus)]

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
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.


-- 
Long live the CoCo