TMS 9981 CPU

TMS9981 CPU

embedded version of 9900 40 pin package;
5V and +12V power supplies.
uses an 8-bit bidirectional data bus, so that standard memory and I/O chips, developed for 8-bit microcomputers.
are easily used in 9981 systems; internally the chip is still a 16-bit microprocessor.
and the 9900 instruction set is preserved.
addressing capability 16 Kbytes of memory.
uses a crystal to generate the timing;