Apple II Dead Test
This is a Dead Test RAM Diagnostic board for the Apple II computer.
The ROM is written by Adrian Black and tests the RAM chips in the Apple II computer.
Dimensions: 100x60mm
PCB: ENIG Gold plated
Colour: Green
Material: FR-4
Qty: 1
More information on using the ROM can be found on Adrian’s github page.
From the github site:
The ROM was designed and tested on the Apple II and Apple II+. (Clones of the Apple II+ should be supported.)
The test should work fine on the Apple IIe and IIc as well, but please keep in mind that those systems use 64kbit DRAM chips, with some using 64kbit x 1 chips (where you have 8 chips for the lower 64K of RAM) and some later machines use 64kbit x 4 bit chips, where you only have two RAM chips for the lower 64k of RAM. You will need to use the schematics to understand how the bit / address errors we’re reporting map to the specific motherboard you have.
The PCB is based off the Language Card.
Note: The LED’s shown on the photo are not populated on the PCB and are not needed for running the RAM test (They will be removed from future PCB designs)
There is also a typo on the silkscreen on the PCB. On the ROM Enable/Disable jumper, the text is switched. So set to disable to enable the ROM and vice-versa.
Usage:
– Insert card into free slot on Apple II and make sure orientation is correct. (See PCB silkscreen – keyboard End, and photo below.)
– Enable ROM (Set jumper on disable)
– Switch on Apple and RAM Tests will be begin.
