Table of Contents
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Table of Contents
P90MB Rev1, P90CE201 Motherboard
Introduction
P90MB is a motherboard based on P90CE201 with 3 RCBus (AKA RC2014-compatible) expansion slots.
Link to previous version of P90MB, P90MB rev0.
Features
P90CE201 at 12MHz
512K PROM
512K RAM
EPM7032S CPLD
Compact flash interface
I2C connectors
Three RCBus (formerly RC2014-compatible) expansion slots
CP/M68K ready
Design Information
Software
CP/M68K BIOS
CP/M68K distribution files, plus gkermit, microEmac, and BASIC compiler. Unzip and use gkermit to upload to P90MB. The console baud rate needs to change to 9600 baud for gkermit to work.
Lee Davison's EhBasic for P90CE201
EPROM programming file with monitor, CP/M, and EhBasic
Conway's Game of Life running on P90MB. This requires a 128×64 OLED display plugged into the I2C connector. The scenerio running is “Gosper Gun”. Note the pin assignment of I2C connector is (left to right) VCC, GND, SCL, SDA. There are some 128×64 OLED display with different pin assignments on the market.
Documentation
P90CE201 Datasheet