clueless_engineer (Brett)
Experienced Member
The French EXL100 and Exeltel computers by Exelvision were the only machines to utilise the Texas Instruments TMS 7220 microcontroller for their CPU.
Their main ICs are:
I designed a pair of DY cartridges for the system if anyone is interested: a 256kbit version that will hold one ROM and a switchable 4Mbit version that will hold 16 ROM images.
Github repository is here.
I have made some videos about the system:
Part 1: First Look
Part 2: Cartridge Pinout
Simple Kicad For Simple Vintage Computer Hobbyists: Part 4 (ROM Cartridge Design)
Part 3: DIY Cartridge
Their main ICs are:
- Texas Instruments TMS4408 ... 8k x 4bit giving 32KBytes of shared VRAM
- NEC D4016 ... 2KByte SRAM for CPU RAM
- Texas Instruments TAL004 ... Gate Array
- Texas Instruments L30002N ... TMS 7220 CPU
- Texas Instruments C34802N ... TMS 7041 peripheral co-processor
- Texas Instruments TMP5220CNL ... TMS 5220 speech synthesiser
- Texas Instruments TMX3556NS ... TMS 3556 video display processor (VDP)
I designed a pair of DY cartridges for the system if anyone is interested: a 256kbit version that will hold one ROM and a switchable 4Mbit version that will hold 16 ROM images.
Github repository is here.
I have made some videos about the system:
Part 1: First Look
Part 2: Cartridge Pinout
Simple Kicad For Simple Vintage Computer Hobbyists: Part 4 (ROM Cartridge Design)
Part 3: DIY Cartridge