Full KEYBOARD/4A-99 upgrade procedure - transforming a Texas Instruments TI-99/4A Mitsumi mylar monster to a modern Cherry MX (and compatible) marvel.

Thanks to @PCBWay for sponsoring this project.

These are now available at [ Ссылка ]

For those outside the US, you can support the project by purchasing direct from my PCBWay project page: [ Ссылка ]

All source files, gerbers, STLs, documentation available at [ Ссылка ]

Hackaday: [ Ссылка ]

Darryl Hirschler's key cap puller: [ Ссылка ]

Music: Courtesy of DivKid

00:00 Introduction
01:09 Computer disassembly
02:53 Keyboard disassembly
07:55 Attaching the ribbon cable
11:03 Attaching the support brackets
13:40 Attaching the new switches
18:30 Attaching space bar mounts
19:34 Re-using the key caps
26:35 Re-assembling computer
29:14 Testing the upgraded keyboard

свернуть