*** M E M O R U M ***

Toying with the idea of doing a Ti-99/4A kit of ICs for repairing faulty old Ti 99/4As !!


Ti-99/4A ICs


Integrated Circuit Description Pin layout Number

TMS9900NL CPU 16 bit DIP64 1
TIM9904ANL Clock Generator DIP20 1
TMS9901NL Parallel I/O DIP40 1
MCM6810P SRAM 128byte DIP24 2
C2E011 ROM DIP24 2
TMS9918ANL VDP DIP40 1
TMS992xNL VDP PAL or NTSC DIP40 1
TMS4116-15NL VRAM (DRAMs) DIP16 8
SN94624N/SN76482 Sound Chip DIP16 1
CD2157NL GROM DIP16 3
SN74LS156N TTL Glue Logic DIP 1
SN74LS00N TTL Glue Logic DIP 3
SN74LS04N TTL Glue Logic DIP 3
SN74LS32N TTL Glue Logic DIP 2
SN74LS74N TTL Glue Logic DIP 1
SN74LS194N TTL Glue Logic DIP 1
SN74LS245N TTL Glue Logic DIP 1
SN74LS244N TTL Glue Logic DIP 2
SN74LS373N TTL Glue Logic DIP 1
SN74LS503N TTL Glue Logic DIP 1
SN74LS138N TTL Glue Logic DIP 2
SN74LS367AN TTL Glue Logic DIP 1
TOTAL 40

If anyone knows which ICs are most likely to fail let me know and I'll order some.