TMS0270 is a variant of the Texas Instruments TMS-1000/TMS-1100 that was used in various Texas Instruments educational toys, such as Spelling B and Mr Challenger. It has 2K of 9-bit ROM and 144 4-bit nibbles of RAM, and uses a 14-segment VFD instead of LEDs.
The ROM bits are physically arranged similarly to the TMS-1100; the bit and page order in each row is the same, but the row order is simplified- the rows are in byte order, from 00 at the top to 7F at the bottom.
Texas Instruments educational toy. The older version described below has a TMC0272 as a master controller, and a TMC1984 as a slave controller.
Hardware description and pinout
picture of TMC0272 ROM array with top metal layer removed
TMC0272 full die shot top metal
TMC0272 full die shot with top metal removed
picture of TMC1984 ROM array with top metal layer removed
TMC1984 full die shot top metal
TMC1984 full die shot top with top metal layer removed
Hardware description and pinout
picture of TMC0274 ROM array with top metal layer removed
TMC0274 full die shot top metal
TMC0274 full die shot with top metal removed
Texas Instruments educational toy. It has a TMC0273 for the controller and a TMC0355 (CD2601) for ROM.
Hardware description and pinout
picture of TMC0273 ROM array with top metal layer removed
TMC0273 full die shot top metal
TMC0273 full die shot with top metal removed
