View Single Post
Old 7th Sep 2020, 1:01 pm   #35
Buzby123
Hexode
 
Buzby123's Avatar
 
Join Date: Oct 2011
Location: Culcheth, Cheshire, UK.
Posts: 346
Default Re: I found it !. A very sorry looking MK14

Hi,

Yes, I remember doing that cut to the 'Y' track back in the day, but I think that must have been just the start of my hacking.

On my main board IC16 is totally removed, and two legs on my 2111s have been bent up and soldered. The daughter board has two 6514s, two 571s, two LS32s, a 7400, a 74LS14, and a 7493.

I can understand there would be a need for gates, but what is that last chip doing ?. It's a counter.

When I eventually get to power the full system, if it doesn't work as expected, then I'm going to have to trace the circuit on the daughter board. It's all Verowired, a real nightmare !.

It will not be soon though. I've got the IO lamps & switches, the display, and the keyboard to test and/or fix.

Cheers,

Buzby
Attached Thumbnails
Click image for larger version

Name:	IC16_2111.jpg
Views:	73
Size:	55.4 KB
ID:	215130  
Buzby123 is offline   Reply With Quote