Texas Instruments TMS9900
Variants

Texas Instruments TMS9900

Section Title: Variants
Table Section Text: None

Model	Description

TI990/9	Early multi-chip CPU for minicomputer systems, 1974

TI990/10	Multi-chip implementation for minicomputer systems, 1975

TI990/12	Multi-chip implementation, faster than 990/10.

TMS9900	Single chip implementation, 1976. Used in the TI-99/4(A) computer.

TMS9940	Microcontroller with 2KB ROM, 128B RAM, decrementer, CRU bus, 1979

TMS9980, TMS9981	8-bit versions of TMS9900

TMS9985	A TMS9940 with 8KB ROM, 256B RAM, and an 8-bit external bus, c. 1978 (never released)

TMS9989	Improved 9980, used in military hardware.

TMS9995	Improved TMS9985-like, no ROM. Used in the TI-99/2 & TI-99/8 prototypes, the Tomy Tutor and the Geneve computer.

TMS99105	Baseline member of the TMS99000 microprocessor family.

TMS99110	TMS99000 family microprocessor with floating point instructions pre-programmed into the on-chip Macrostore ROM memory.

TMS99120	TMS99000 family microprocessor with run-time support routines for the PASCAL high-level language pre-programmed into the on-chip Macrostore ROM memory. (Microprocessor was announced but may never have been commercially produced.)

Sentence(s)

A member of the TMS99000 family, the TMS99120, was announced but may never have been commercially produced.

final_sentence: A member of the TMS99000 family, the TMS99120, was announced but may never have been commercially produced.