Les
Bird's Heathkit H8 Expansion Cards
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This PCB has been replaced by the Rev 2 board.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
e-mail