> The TMS9900 has already been identified as a 16-bit ISA, even with its > bit-serial ALU. > > So some enterprising soul could device a shift-register-based MPU with > 1-bit memory bus, but with a 256 bit word size and it would be a 256 bit > ISA?
I don't think this follows. Looking at the TMS 9900 datasheet, the block diagram shows a full 16 bits on each ALU input and 16 bits leaving it. There's no 1-bit bus directly to memory. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com -- "Endian Little Hate We" -- credits from Connectix Virtual PC 6 for Mac -----
