H8 Hardware
This page contains H8 expansion boards. These are brand new redesigned and modernized (when possible) PCBs.
Click here to download hi-res versions of the PCB layouts.
To order a PCB click on the ADD TO CART button. Note that these are only PCBs and not fully assembled cards. You will need to order the parts and assemble the card yourself.
H8-FP Front Control Panel
Material List
A new front control panel design for the Heathkit H8 computer.
PCB only - $40.00
H8-BP Backplane
Material List
A new backplane/motherboard for the Heathkit H8 computer with ATX-style 24-pin power connector.
PCB only - $40.00
H8-Z80-64 Rev 2.1a
Documentation (pdf)
PCB only - $40.00
H8-4
Material List
A replica of the original H8-4 Multi Serial Port Card from Heath but without the 20ma loop circuitry.
Docmentation (pdf)
PCB only - $30.00
H8-17
Material List
A replica of the WH17 Disk Controller from Heath. Modified to allow easy configuration for ORG0 and non-ORG0 systems as well as adding some diagnostic LEDs. Also note that there is an accompanying 1K adapter card that will convert the signals from the memory socket to a pair of 2114s as the original card had. This is for better compatibility with non-ORG0 systems.
Documentation (pdf)
PCB plus 1K Adapter - $30.00
H8-8-8
A smaller more compact version of the HA8-8 Extended Configuration card from Heath. This card inserts facing forward as opposed to the original which faced toward the back. This card along with the accompanying ROM (Part #444-70) converts an H8 computer to an ORG0 system. The ROM is supplied on a 2732 EEPROM which means you will need to configure your CPU card accordingly.
H8-8-8 Extended Configuration Card (54KB zip file)
Documentation (pdf)
PCB plus 444-70 XCON8 ROM - $20.00
H8-64
A single-chip 64K RAM card with mini-prototyping area for ORG0 H8 systems.
Documentation (pdf)
PCB only - $20.00
H8-Z80-64 Rev 1.8
This PCB has been replaced by the Rev 2 board. It is shown here only for reference.
H8-Z80-64 CPU Card (108KB zip file)
Documentation (pdf)
SEBHC.ORG
November 23, 2009