HardLabs

P8x memory card

ksr·p8x·hardware/memory-card/kicad/p8x-memory-card.kicad_pcb

P8x memory card PCB layout, top view — open source board by ksr

About the P8x memory card PCB

P8x memory card is an open source PCB design by ksr, published on GitHub. It is a 4-layer board measuring 280 × 140 mm, with 35 components from 14 distinct parts.

Other key parts include the 28C256, 62256, 74HCT245, 74HCT30 and 74HCT138. By type, the board carries 11 ICs, 11 capacitors, 6 LEDs and 1 connector.

From the project

The P8X memory card realised as an orderable KiCad 10 PCB. This is the first P8X logic card taken through KiCad (the XOR trial board was the first KiCad board overall); every other board followed it into KiCad, from the netlists in generators/geneagle.py. Generators are canon her

The P8X memory card realised as an orderable KiCad 10 PCB. This is the first P8X logic card taken through KiCad (the XOR trial board was the first KiCad board overall); every other board followed it into KiCad, from the netlists in generators/geneagle.py. Generators are canon here too — edit the scripts and re-run, don't hand-edit the .kicadpcb.

280 × 140 mm, 4-layer — the uniform plug-in card size since 2026-09-18 (it was first laid out at 210 × 100 mm; see ../../KICAD-BOARDS.md). Stackup:

Main components on the P8x memory card

28C2566225674HCT24574HCT3074HCT13874HCT0074HCT3274HCT08

P8x memory card bill of materials (BOM)

35 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
28C256
U1
2
62256
U2, U10
1
74HCT245
U3
1
74HCT30
U4
2
74HCT138
U5, U6
1
74HCT00
U7
2
74HCT32
U8, U11
1
74HCT08
U9
1
MABC96R
J1
6
1K
RP1, RS1, RS2, RS3, RS4, RS5
3
YEL
LED2, LED4, LED7
2
GRN
LED3, LED5
1
RED
LED6
11
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +3

P8x memory card design files

The KiCad project lives in the ksr/p8x repository on GitHub; these links point at the commit this page was built from.

P8x memory card: common questions

How big is the P8x memory card PCB?

The P8x memory card measures 280 × 140 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the P8x memory card?

35 components, from 14 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the P8x memory card design files?

From the ksr/p8x repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the P8x memory card design in my own project?

The repository has no license, so all rights stay with ksr. Use it as a reference, and ask the author before reusing the design.

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