Boards in 34 GitHub repositories, designed in KiCad, that use the 74LS85DC by Texas Instruments (-55℃~+125℃ 10mA 24ns Four channels TTL CDIP-16 Comparators ROHS). See how each wires it, with its parts, size, README and files; the 74LS85DC’s symbol, footprint and pinout are on its own page.
Nakazoto/CenturionComputer
This is just a simple backup of all the files related to the Centurion that I have stored on my HD. The Wiki itself has far more in-depth information about the Centurion and it's individual cards.
abzman/intellivision-t-card
replica of the t-card development cart for the intellivision that takes standard ROMs
hanshuebner/cpc-floppy-controllers
MOVED to code.netzhansa.com/hanshuebner/cpc-floppy-controllers. This GitHub mirror is archived.
0nonymous/Breadboard-CPU-Computer-System
This project is a fully microcoded 8-bit CPU designed from scratch and implemented using 100+ 74LS-series ICs across 40+ breadboards. CURRENTLY REIMPLEMENTING ON FPGA: https://github.com/0nonymous/fpga-cpu
electrickery/VIO_MPF_I
Extended firmware for the 6845 based video card for the Microprofessor MPF-I(b)
reifsnyderb/Atari-1090XL-80CVC
Re-make of the Atari 1090XL 80 column card for monochrome monitors.
tergav17/Z80-MegaMapper
Z80 interposer board providing extended memory and I/O instruction mapping
warmech/lisa-lisalite
This is a reproduction of the Lisa Lite adapter card used to integrate Sony/Macintosh 400K 3.5" floppy drives into an Apple Lisa (in place of a Twiggy).
alvaroalea/QL_Cumana_FLoppyController
A clone of the Cumana's Disk Interface for the Sinclair QL
dbalsom/pxl-380
A reverse-engineering of the FTG PXL-380 Light Pen Interface Card
Gosharad1980/DistributedPulseModulation
Distributed pulse modulation done, with KiCad 9, like with the old P82C150, but with descrete components
lafehubert/electronics
A place for info and code relating to my electronics projects
ToddHoug/cadzilla
CADzilla is an S-100 bus board built around the Hitachi HD63484 Advanced CRT Controller (ACRTC) paired with a Brooktree Bt453 video DAC.
TSJR/logic-analyzer
TTL logic analyzer built from 74xx logic and LED dot matrix display
lynchaj/duodyne
Duodyne is a hobbyist retrocomputer system designed to run ROMWBW. It is comprised of modules on a system bus