https://deskthority.net/photos-f62/and-a-burroughs-td015-t15794.html
http://bitsavers.trailing-edge.com/pdf/burroughs/terminal/
https://deskthority.net/photos-f62/burroughs-td016-data-preparation-t13558.html
What a nice design.
(and the back if you're morbidly curious)
This thing has a lot of 6821s. Three 6850 UARTs I can understand.
(and the back if you're morbidly curious)
Two banks of 4027 4kx1 dynamic RAM. Installed at different times because the older (?) RAM chips read
1627 6941 90967 8051and the later (?) ones
TMS4027-20NL P7927There are eight ROMs installed, with space for 32 ROM chips. As far as I can tell, these are 16 kilobit (2k x 8) mask PROMs with programmable chip-select lines.
Edit 2023-06. Turns out someone scraped this website and uploaded my pictures and initial ROM dumps to bitsavers. And the initial ROM dumps (B1.TXT to B8.TXT) are rubbish. I think I was reading too fast for the chips, I added a 1ms delay to my code and the result looks slightly more sane.
There's a thread about all of this on VCFED.
The CPU board also has a single 82S123 32x8 fuse ROM presumably used for address decoding.
(and the back if you're morbidly curious)
Video controller (I assume) is marked
AMI 7852AG 1627 6834 KOREAThe "7852" is probably the date code.
The character generator ROM is marked
SCM3738L 1627 4458 AA78 43I have no idea how to read it yet.
2 x AM9112 / C2112-1 RAMs
Four 32x8 82S123 fuse ROMs
|
|
Back to Wouter's CCC Page | (This page last modified 2023-06-17) |
