Norberto’s H8 Computer
H-89 2/4MHz Speed Module
H-89 Speed Board Schematic by Ken L. Owen
H-89 Speed Boards Available: 0
Speeding up your Heath H-89/90 by Ken L. Owen
CP/M - HDOS Images Layout by Ken L. Owen
CP/M - HDOS Images by Ken L. Owen
Factory Board Files
H17 HDOS MOD for 4MHZ boot by Ken
