[Coco] Emulation Bummer Action (or lack thereof)

Little John sales at gimechip.com
Sat Nov 20 15:14:54 EST 2010

I've never used VirtualBox, but I have run Jeff's emulator and David Keil's 
emulators in DOSBox. DOSBox already has "DOS" of sorts built in - no need to 
install DOS. It works pretty well. Since DOSBox can emulate a real 
soundblaster, the emulators can send their sound to the virtual 
"soundblaster" as well.

----- Original Message ----- 
From: "Roger Merchberger" <zmerch-coco at 30below.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Saturday, November 20, 2010 2:01 PM
Subject: [Coco] Emulation Bummer Action (or lack thereof)

> Well, I installed FreeDOS in a virtual machine, figured out how to get a 
> copy of the CoCo3 ROM in a format that JV's emulator likes, got everything 
> "working," and...
> no dice. :-(
> The best I could get was the startup screen, then it would lock the 
> virtual PC (Ctrl-Alt-Del wouldn't reboot the system) - virtual hard reset 
> was the only way to regain control of the OS.
> DSKINI.exe, Port.exe & the VGA test program all work fine, however.
> So, I thought: "Maybe it's something DOS specific..." so I found my MS-DOS 
> 6.22 disks, was able to get them imaged, and installed "real" MS-DOS on 
> another virtual computer. (The installer doesn't work well, you have to 
> fdisk & format the drive manually). Copied the files over (thankfully JV's 
> emulator fits on a floppy) and...
> same thing. :-((
> I tinkered with some of the HIMEM/EMM386 settings & other stuff, and also 
> changed the interface types in VB to things as old as I could (PIIX3 IDE 
> inteface, etc.), but again, the best I could do was the welcome screen & 
> the system would lock.
> It's not the CoCo3 ROM image going south, I tried the included OS-9 boot 
> ROM also, and didn't get any farther; it's possibly an "emulated memory" 
> issue or somesuch...
> Short of creating a real MSDOS install on a real PC (which I may very well 
> try, but not this weekend, anyway) anyone better at VirtualBox than I am 
> have any clues they could send my way? ;-) Or am I forging new ground 
> here...
> Does anyone here still run JV's emulator at all?
> Thanks,
> Roger "Merch" Merchberger
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