Path: utzoo!utgpu!water!watmath!clyde!att-cb!att-ih!pacbell!ptsfa!lll-tis!mordor!sri-spam!sri-unix!ctnews!voysys!bruce
From: bruce@voysys.UUCP (Bruce Beare)
Newsgroups: comp.sys.m68k
Subject: Re: emulating 68000s: Force * HP = aargh
Summary: HP Emulator problems (mc6809)
Keywords: 68000, emulation
Message-ID: <227@voysys.UUCP>
Date: 30 Mar 88 22:44:12 GMT
References: <6655@ames.arpa>
Distribution: comp.sys.m68k
Organization: Voysys Corporation, Sunnyvale, CA
Lines: 17

In article <6655@ames.arpa>, smyoung@ames.arpa (Sarah M. Young) writes:
> My group is having an emulation problem maybe someone else
> has seen.  We're trying to emulate a 68000 chip with an HP64000
> 68000 emulation pod and system.  The chip is on a Force CPU-5
> ...

We have been having similar problems with their 6809E emulators.
Whenever we use DMA (or if we have trap on illegal opcode enabled), the
emulator will eventually get confused. This problem can be minimized by
turning off the 'trap on illegal opcode' - then even if the emulator gets
confused, the pod will continue to run the code.

	Bruce Beare
	Voysys Corporation
	..!pyramid!ctnews!voysys!bruce

Usual Disclaimer: I speak for me only, etc...