MBC-XT clone mainboard circuit board

[tipc]

Thank you for posting a photo. If you have access to a scanner it would be useful to do a high resolution scan of the front and back. Especially with the board only being double sided, it would be possible to use the scanned artwork to create a PCB layout. Even a free PCB layout program like ExpressPCB should be able to handle this.

I can e-mail you 12mpix photos of the front and back now (which I think works out to about 300dpi). I have a scanner, part of a laser printer, in my storage unit. I'm not so sure the quality will be all that much better, but I can give it a go eventually. If you zoom in on these, basically all the information is there, afaict anyway.

 

[mmruzek]

That will be great! I have the same user name at gmail.com After I receive the photos I can upload them to my website and provide a link here... As I expect a few other people will be interested! Regards, Michael

 

[mmruzek]

Here are 2 high resolution photos of the front and back of the MBE-XT board, courtesy of VCF forum member 'tipc'. I will host these photos on my website for a few weeks for those with an interest to grab a copy. Regards, Michael

http://www.mtmscientific.com/mbe-xt-1.JPG

http://www.mtmscientific.com/mbe-xt-2.JPG

 

[alecv]

Wow! Hand-driwing PCB!


P.S.
We finally have found schematic for the motherboard (or very similar)
http://s11.photobucket.com/user/cgprogrammer/media/8088.jpg.html
compare to the photo at page 3-2
http://www.minuszerodegrees.net/manuals/Fountain/Fountain FTN-88 - Users Manual.pdf
(nice hand-drwawn schematic included)
Thx for modem7 for hosting.

 

[tipc]

I guess he could be right. The traces do look kind of wiggly! Don't have anything in reach to compare it to (don't think, most stuff is in storage). Never really gave any though to how it was produced. I'm not knowledgeable of the processes IBM used to produce their 5150 main boards. And it probably was revised through it's life cycle. Others understandably were done in much cruder ways, much lower quantities.

I made jello ('j') last week! That means my old supply of Knox gelatine held up after all these years. Real busy w/other stuff right now, and have 20 x 10^6 irons in the fire anyway, but I'm working toward making some kind of circuit board (more then likely an 80188 robot brain which I've discussed many times). I even have a laser printer to print out the masks with. Getting closer . . .