Retro Tech GAT addon at DEF CON 33. Powered by CH32X033, includes USB, 9x RGBLED and 3x single color LED.

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true efaeb803a5 fix various bugs. editor button initial WIP. setting cursor to off would keep its last state active. fixed. cursor wouldn't turn off all the way and would glitch out. fixed. cursor now has a nicer fadeout. fixed potentiometer scaling factors. tried fixing clockspeed stuff. with these changes clock speed can more reliably change to 24MHz or 48MHz, but this isn't thoroughly tested. 3MHz to 24MHz was still crashing. as ADC is in use, code would need to be refactored to not change clock speed while ADC is converting. since I don't want to do this right now, this will run at a fixed speed at the expense of 0.5-1mA. editor buttons working and updated to the new arrangement, but not tested in depth. pressing and holding to exit parameter editor while edit mode active would result in next entry into parameter editor being in edit mode. fixed. lsens / stat LED now functioning in program and parameter edit modes.	2025-07-24 16:03:48 -07:00
firmware/retro_tech_fw	fix various bugs. editor button initial WIP.	2025-07-24 16:03:48 -07:00
README.md	initial commit of in-progress port	2025-07-24 03:37:26 -07:00

true efaeb803a5 fix various bugs. editor button initial WIP.

setting cursor to off would keep its last state active. fixed.

cursor wouldn't turn off all the way and would glitch out. fixed.

cursor now has a nicer fadeout.

fixed potentiometer scaling factors.

tried fixing clockspeed stuff. with these changes clock speed can more reliably change to 24MHz or 48MHz, but this isn't thoroughly tested. 3MHz to 24MHz was still crashing. as ADC is in use, code would need to be refactored to not change clock speed while ADC is converting. since I don't want to do this right now, this will run at a fixed speed at the expense of 0.5-1mA.

editor buttons working and updated to the new arrangement, but not tested in depth.

pressing and holding to exit parameter editor while edit mode active would result in next entry into parameter editor being in edit mode. fixed.

lsens / stat LED now functioning in program and parameter edit modes.

2025-07-24 16:03:48 -07:00

firmware/retro_tech_fw

fix various bugs. editor button initial WIP.

2025-07-24 16:03:48 -07:00

README.md

initial commit of in-progress port

2025-07-24 03:37:26 -07:00

README.md

Retro Tech Community GAT

A GAT (v1.69bis compatible) addon for Retro Tech.

Code was ported from code that was rushed in a couple of days.

Sorry.

Hardware Specifications

CH32X033F8P6 MCU (62K Flash, 20K SRAM)
IS31FL3729 matrix LED controller
9x RGB LED, one for each RETRO character
White, amber and green LEDs for the cursor
Adjustment knob to feel like the old times
Up/Down/Press Jogwheel for programming
8Kbit EEPROM for storing user configurations

Manual

User instructions for the addon can be found at trueControl BASIC:

https://basic.truecontrol.org/database/dc33/retro-tech-gat/

Building

Firmware is provided as a MounRiver Studio II project. The MRS2 version originally used v2.20. You can freely download MounRiver Studio at http://mounriver.com/download. The software is in Engrish.

Flashing

Firmware can be debugged and flashed from within MounRiver Studio II using a WCH-LinkE debug probe. Alternatively, firmware can be updated with WCHISPTool or equivalent using the USB connector. At this time no instructions are provided for updates.

If and when there is a firmware update available, update instructions will be provided.