mike danick

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Tools, APP Software Used etc.

KiCAD

Kicad

Description

TI-99/4a FinalGROM99

The TI 99/4A FinalGROM Cartridge, or FinalGROM 99 for short, is a cartridge for the TI 99/4A home computer that allows you to run ROM and GROM cartridge images from an SD card.

The FinalGROM 99 supports ROM images, GROM images, and mixed images of up to 1 MB in size that use the write-to-ROM bank switching scheme. The cartridge does not require the Peripheral Expansion Box and runs on both PAL and NTSC consoles, including modified consoles with an F18A.

It will also run on v2.2 consoles and enables those to run ROM-only programs.

The cartridge offers some advanced modes that provide RAM and GRAM to programs. It also allows a running program to reload another program from SD card or to dump its state to SD card.

All firmware of the FinalGROM 99 can be updated by SD card.

Code

Site Link

https://endlos99.github.io/finalgrom99/

Schematic and Layout

Github Link

https://github.com/endlos99/finalgrom99

Download BOM(Bill of materials)

Jun 16,2023

2,136 views

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TI-99/4a FinalGROM99

FinalGROM99 is a SD MulitCart that allow you to play ROMs and GROMs on your TI99/4a.

2136

10.00 (1)

Published: Jun 16,2023

BOM(Bill of materials)

PCBWay Donate 10% cost To Author

File Last Updated: 2024/12/07 (GMT+8)

File update record

2024-12-0702:45:04

Gerber file is updated.

2023-11-2509:27:06

Parts List (BOM) is updated.

2023-11-2509:27:06

Gerber file is updated.

2023-06-1611:27:15

Parts List (BOM) is updated.

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Topic

DIY Electronics

Hardware

Computers & USB

DIY Texas Instruments TI-994a FinalGROM99 FinalGROM FinalGrom

Comments(4)
Likes(9)

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PCBWay Team
Hi, XC95144XL-10TQ100I is out of stock for us. Could you please provide an alternative part number?

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Mar 27,20250 Comments
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PCBWay Team
Hello, thanks for sharing. I noticed that you updated gerber, so does the corresponding BOM need to be updated?

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Dec 07,20242 Comments
mike danick 2024-12-07 22:25:03Reply
no the current bom is fine.
PCBWay Team 2024-12-09 09:33:04Reply
Reply@ mike danick：
OK, thanks. We got it.
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