8088 CPU Tester
This tester is designed to check DIP-40 pin Intel 8088 CPUs, the classic chips used in many retro computers.
While the tester does not test every function of the 8088, it verifies enough to ensure the CPU is working or faulty.
CPU Tests:
– Test all address and data lines
– Executes instructions from RAM/ROM, further verifying address and data line integrity.
– Performs read/write checks to RAM
– 8 Output LED’s are driven via an 8255 PPI
– CPU clock generated by an Intel 8284 clock generator chip.
– Tests interupts using a 8253 PIT.
Included:
1 x 8088 CPU Tester (The actual 8088 CPU is not included in the sale)
Usage:
- Insert the 8088 CPU into the ZIF socket and make sure the orientation is correct. (Pin 1 top left)
- Connect a mini USB Type B cable (Not supplied) from your PC (Or 5V USB charger) to the CPU Tester.
With a working 8088 CPU, the code executes from ROM, running tests and pulsing the 8 LEDs in a “Knight Rider” style sequence. This test repeats in a loop.
If the 8088 is faulty, the code may not start (so no LEDs light), or the display will freeze while pulsing through the LED’s.
See attached video for the output on a working 8088.
Each tester has been carefully assembled and tested to ensure proper operation before shipping.
See product manual for more details on the tester and interprretting the results.
