Midwest Scientific Instruments 6800

[Brad H]

Thanks Chris.. yes I think you are correct.  Here is a photo of it:
http://s1381.photobucket.com/user/unclefalter/media/20160520_194139_zpswkjgwf17.jpg.html
This is the CPU board.  I'm wondering why it has four EPROMs, and what the two unmarked do.  This is where I wish there were a manual.. or even a good pic of an untouched original board to compare.
http://s1381.photobucket.com/user/unclefalter/media/20160520_194018_zps8odxjmid.jpg.html
I'd just settle for being able to fool around in the monitor.  But I think this monitor is called WEEBUG because it's very stripped down.
Sent from my Samsung device

-------- Original message --------
From: Chris Elmquist <chrise at pobox.com> 
Date: 2016-08-01  8:14 PM  (GMT-08:00) 
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>, Brad H <vintagecomputer at bettercomputing.net> 
Subject: Re: Midwest Scientific Instruments 6800 

I have all kinds of SWTPC 6800 stuff here and I think I recognize your floppy controller as a PERCOM LFD-400 board.  These are somewhat unique because they are built around a sync USART (S2650) and use 10-hole hard-sector floppy media (just like Heath H17 and Northstar systems).

Can you see any PERCOM logo on the floppy controller board?

Are there two 2708 EPROM on that board?

Chris





On August 1, 2016 12:32:49 PM CDT, Brad H <vintagecomputer at bettercomputing.net> wrote:
>Just thought I'd send out another shout out to anyone who might have
>one of these or is familiar with them.  I've had this a while but have
>not really been able to use it, lacking a boot disk.  It also doesn't
>have the standard MSIBUG ROM.  I'm hoping maybe someone out there knows
>how I could procure the original ROMs and put this back to stock.
>I made a video showing the current 'WEEBUG' ROM in case any are curious
>or someone out there knows about it.
>Thanks!
>https://youtu.be/LY7yoAVxSrM
>
>
>
>Sent from my Samsung device

-- 
Chris Elmquist