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IMSAI Boards

CP-A Rev-5  
                 
 

This is the list of all IMSAI boards in the catalog. We have new IMSAI boards in addition to reproductions of 1970s IMSAI boards. The reproduction boards are licensed for sale by IMSAI from RetroTechReboot. All other boards are designed and sold by the IMSAI division of Parastream Technologies.

Choose from the links below to take you to the appropriate section.

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Complete Board Kits

Order from the list below. The kits are complete with everything you need except solder and tools. They even come with a professionally printed user manual.

DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
CP-A Rev-4 front panel (operator’s console)CP-A-RIn stock$399.00
CP-A Rev-4 front panel (operator’s console), no switchesCP-A-R-NSIn stock$299.00
EXP-22 22-slot backplane with 2 edge connectors and 2 card guidesEXP-22In stock$169.00
EXP-22 22-slot backplane with 11 edge connectors and 20 card guidesEXP-22/11In stock$349.00
EXP-22 22-slot backplane with 22 edge connectors and 42 card guidesEXP-22/22In stock$529.00
MPU-A Rev-4 2 MHz 8080A processorMPU-AIn stock$219.00
PIO 4-1 Rev-2 4-port parallel I/O with 1 port includedPIO 4-1-R1/31/2026$149.00
PIO 4-4 Rev-2 4-port parallel I/O with all 4 ports includedPIO 4-4-R1/31/2026$229.00
PS-28S 28 Amp power supplyPS-28SIn stock$299.00
PS-28S kit with manual (no power modules)PS-28S-NPMIn stock$149.00
RAM 16A Rev-1 16K static RAMRAM 16AADVANCE ORDER$170.00
1/31/2026$189.00
Two RAM 16A Rev-1 kits (32K) with one manualRAM 16A/2ADVANCE ORDER$295.00
1/31/2026$329.00
Four RAM 16A Rev-1 kits (64K) with one manualRAM 16A/4ADVANCE ORDER$495.00
1/31/2026$549.00
SIO 2-1 Rev-3 2-port async/sync serial I/O with 1 port includedSIO 2-1-RIn stock$229.00
SIO 2-2 Rev-3 2-port async/sync serial I/O with 2 ports includedSIO 2-2-RIn stock$249.00

Some products may be available for advance order at a discount before they are generally available. The expected ship date is shown right below the advance order row. This date is subject to change. Purchases made after this date will not be discounted.

Options

DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
18 in (450 mm) internal cable, 26-pin card edge to DB25-F for MIO, SIO 2CABLE AIn stock$29.00
18 in (450 mm) internal cable, 50-pin card edge to two DB25-F for PIO 4CABLE BIn stock$49.00
Edge connector and two card guides for IMSAI backplanesEXPMIn stock$22.00
LED and spacer spacer kit for any IMSAI PIO 4-4 (32 LEDs and spacers)PIO 4-4 LEDIn stock$16.00
Port expansion module for PIO 4-1 Rev-2PIO 4M-RIn stock$35.00
Port expansion module for SIO 2-1 Rev-3SIO 2M-RIn stock$30.00
Replacement LED and spacer kit for IMSAI RAM 4A (4 red and 4 green LEDs and spacers)RAM 4A LEDIn stock$8.00
Socket set for CP-A Rev-4, machinedSOCM-CP-A-RIn stock$28.00
Socket set for CP-A Rev-4, standardSOC-CP-A-RIn stock$9.00
Socket set for MPU-A, machinedSOCM-MPU-AIn stock$24.00
Socket set for MPU-A, standardSOC-MPU-AIn stock$7.00
Socket set for PIO 4-4 Rev-2, machinedSOCM-PIO 4-4-RIn stock$26.00
Socket set for PIO 4-4 Rev-2, standardSOC-PIO 4-4-RIn stock$8.00
Socket set for RAM 16A, machinedSOCM-RAM 16AIn stock$89.00
Socket set for RAM 16A, standardSOC-RAM 16AIn stock$22.00
Socket set for SIO 2-2 Rev-3, machinedSOCM-SIO 2-2-RIn stock$35.00
Socket set for SIO 2-2 Rev-3, standardSOC-SIO 2-2-RIn stock$11.00

Bare Boards

You may order a bare printed circuit board for you to use your own parts. Be advised that individual parts are not available to bare board customers unless they are explicitly in the parts list below.

DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
CP-A Rev-4 bare boardCP-A-R BBIn stock$59.00
EXP-22 bare boardEXP-22 BBIn stock$49.00
MPU-A Rev-4 bare boardMPU-A BBIn stock$49.00
PIO 4 Rev-2 bare boardPIO 4-R BB1/31/2026$60.00
PS-28S bare boardPS-28S BBIn stock$39.00
RAM 16A Rev-1 bare boardRAM 16A BBADVANCE ORDER$53.00
1/31/2026$59.00
SIO 2 Rev-3 bare boardSIO 2-R BBIn stock$55.00

Some products may be available for advance order at a discount before they are generally available. The expected ship date is shown right below the advance order row. This date is subject to change. Purchases made after this date will not be discounted.

Parts

DescriptionPart NumberAvailabilityUnit Price (USD)QuantityOrdering
Mains power cable with disconnects, 18 in (450 mm) CABLE CGIn stock$7.00
CP-A Rev-4 data bus cable, 18 in (450 mm) CABLE KIn stock$10.00
CP-A Rev-5 data bus cable, 6 in (150 mm)CABLE WIn stock$8.00
Switch bracket and screws for any IMSAI CP-ACP-A BKTIn stock$57.00
Mounting hardware for CP-A PNL or CP-A-R PNLCP-A HWIn stock$20.00
LED and spacer kit for any IMSAI CP-ACP-A LEDIn stock$24.00
Switch set for any IMSAI CP-ACP-A SWIn stock$129.00
Panels, masks, and hardware for a CP-A Rev-4 'IMSAI 8080' front panelCP-A-R PNLIn stock$179.00
CP-A Rev-4 user manualUM-CP-A-RIn stock$20.00
EXP-22 Rev-1 user manualUM-EXP-22In stock$16.00
MPU-A Rev-4 user manualUM-MPU-AIn stock$17.00
PIO 4 Rev-2 user manualUM-PIO 4-R1/31/2026$20.00
PS-28S Rev-1 user manualUM-PS-28SIn stock$16.00
RAM 16A Rev-1 user manualUM-RAM 16AADVANCE ORDER$15.00
1/31/2026$17.00
SIO 2 Rev-3 user manualUM-SIO 2-RIn stock$29.00

Some products may be available for advance order at a discount before they are generally available. The expected ship date is shown right below the advance order row. This date is subject to change. Purchases made after this date will not be discounted.


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