X688, Experimental prototype for P90CE201


P90CE201 is derived from 68000 but with 8-bit data bus, 24-bit address bus and integrated I/O. Please see this page for X688 with engineering change that allows it to run CP/M68K



  • P90CE201 running at 22MHz
  • 512KB EPROM
  • 512KB RAM

Design Information


S Record loader is a very simple monitor that load Motorola S records into RAM and start program execution from 0x1001000.

Memory diagnostic checking RAM memory from top of the program to 0x107F000

EhBasic is Lee Davison's enhanced Basic for 68K.


Getting Started with X688

P90CE201 Data Sheet

builderpages/plasmo/x688.txt · Last modified: 2019/12/06 08:53 by plasmo
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