Burroughs TD831

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 6830 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
8051
and the later (?) ones
TMS4027-20NL
P7927
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. Here are my raw dumps 1, 2, 3, 4, 5, 6, 7, 8.

(and the back if you're morbidly curious)

Video controller (?) is marked

AMI 7852AG
1627 6834
KOREA
The 7852 looks like the date code.

The character generator (?) is marked

SCM3738L
1627 4458
AA78 43

2 x AM9112 / C2112-1 RAMs


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