Files | uPD7220 Retro Graphics Card (and VGA hack)

uPD7220_card_v2.zip

The v2 design. It should work as intended, based on simulations.

Zip Archive - 1.22 MB - 06/12/2024 at 19:00

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updgfx_r0.kicad_pcb

KiCad raw PCB design. This can be uploaded directly to OSHPark.

x-kicad-pcb - 1.89 MB - 05/08/2024 at 01:52

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updated_uPD7220_design.zip

Updated schematic, with all KiCad design files. This is a bit messed up due to the KiCad version change and transfer, but the PCB design should work fine as is. This fixes the connections to the color resistor networks, and fixes the oscillator.

Zip Archive - 3.62 MB - 05/08/2024 at 01:51

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updgfx_r0_updated.pdf

Updated schematic, provided in PDF format. This fixes the connections to the color resistor networks, and fixes the oscillator.

Adobe Portable Document Format - 138.46 kB - 05/08/2024 at 01:50

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video_timing_calculator.py

Python3 program to create valid VGA video timings for the uPD7220. Use it to generate values to plug into videoconf.h

plain - 5.11 kB - 04/04/2019 at 06:05

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uPD7220_card_ctrl.ino

An arduino sketch used to control my graphics card. Use it as example code, a test program, or as a base for your own driver!

ino - 3.77 kB - 04/04/2019 at 06:04

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videoconf.h

Video configuration settings for the uPD7220. Goes with uPD7220_card_ctrl.ino

plain - 1.45 kB - 04/04/2019 at 06:04

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graphics_card_design.zip

ATTENTION: Old design, broken/old files, for archives only.
This design partially works. The output from the shift registers should be q3, but q0 is used instead (a mistake). Before using either be prepated to modify the PCB or fix the design.

x-zip-compressed - 797.96 kB - 04/04/2019 at 05:30

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uPD7220-uPD7220A_User_Manual_Dec85.pdf

In case this disappears from the rest of the Internet

Adobe Portable Document Format - 3.54 MB - 04/04/2019 at 01:40

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uPD7220_card_v2.zip The v2 design. It should work as intended, based on simulations. Zip Archive - 1.22 MB - 06/12/2024 at 19:00		Download
updgfx_r0.kicad_pcb KiCad raw PCB design. This can be uploaded directly to OSHPark. x-kicad-pcb - 1.89 MB - 05/08/2024 at 01:52		Download
updated_uPD7220_design.zip Updated schematic, with all KiCad design files. This is a bit messed up due to the KiCad version change and transfer, but the PCB design should work fine as is. This fixes the connections to the color resistor networks, and fixes the oscillator. Zip Archive - 3.62 MB - 05/08/2024 at 01:51		Download
updgfx_r0_updated.pdf Updated schematic, provided in PDF format. This fixes the connections to the color resistor networks, and fixes the oscillator. Adobe Portable Document Format - 138.46 kB - 05/08/2024 at 01:50		Preview

video_timing_calculator.py Python3 program to create valid VGA video timings for the uPD7220. Use it to generate values to plug into videoconf.h plain - 5.11 kB - 04/04/2019 at 06:05		Download
uPD7220_card_ctrl.ino An arduino sketch used to control my graphics card. Use it as example code, a test program, or as a base for your own driver! ino - 3.77 kB - 04/04/2019 at 06:04		Download
videoconf.h Video configuration settings for the uPD7220. Goes with uPD7220_card_ctrl.ino plain - 1.45 kB - 04/04/2019 at 06:04		Download
graphics_card_design.zip ATTENTION: Old design, broken/old files, for archives only. This design partially works. The output from the shift registers should be q3, but q0 is used instead (a mistake). Before using either be prepated to modify the PCB or fix the design. x-zip-compressed - 797.96 kB - 04/04/2019 at 05:30		Download
uPD7220-uPD7220A_User_Manual_Dec85.pdf In case this disappears from the rest of the Internet Adobe Portable Document Format - 3.54 MB - 04/04/2019 at 01:40		Preview