2 layers
VideoBoard
Cptscorcher/Excallibur-64
A reimagining of the seminal Excalibur 64 Computer
126 partsGPL-3.0
2 layers145.3 × 129.9 mm
C128Diag
hackup/C128Diag16Replica of the Commodore C128 Diagnostic Test cartridge Assy No. 325093-01.
- Size
- 145.3 × 129.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 61
- Nets
- 109
- Pads
- 353
- Tracks, vias
- 1,174, 219
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 28 May 2023
- Updated
- 24 Apr 2025
Overview
C128Diag is an open-source printed circuit board by hackup, from the hackup/C128Diag repository on GitHub. It is a 2-layer board of 145.3 × 129.9 mm with 61 parts on 109 nets, routed with 1,174 tracks and 219 vias.
It is built around the 74HC245D, 74LS04PC and 74HC08D, with the 74HC374, 74LS10PC and NE555P among its other parts. Its parts include 15 capacitors, 14 ICs, 8 connectors and 4 resistors. It belongs with the retro computing and games boards of this library.
Main components
6
74HC245D
SO-20-300mil-40℃~+125℃ 1 160uA 2V~6V 7.8mA 7.8mA 74HC 8 9ns@4.5V,50pF Bidirectional Tri-State SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, Transceivers
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
74HC08D
SOP-14-40℃~+125℃ 1.5V~4.2V 1.9V、3.7V、5.2V 100mV、400mV 2 27ns@4.5V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series AND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74HC374
SOIC-20SOIC-20 New Arrivals ROHSTexas InstrumentsUncategorised74LS10PC
PDIP-140℃~+70℃ 3 3.3mA 4.75V~5.25V 74LS Series NAND Gate PDIP-14 Logic GatesonsemiLogic Gates
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
README
README.mdC128 Diagnostic Cartridge 325093-01 Replica
This is a 1:1 replica of the PCB for the Commodore C128 Diagnostic Test cartridge assy no. 325093-01. See my blog post for more details.
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Parts
61| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 100n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15 |
| 14 | MountingHole | C128Diag:Hole_3.2mm | H1, H2, H3, H4, H5, H6, H7, H8, H9, H10, H11, H12, H13, H14 |
| 5 | Jumper_2_Open | C128Diag:Jumper | JU1, JU2, JU3, JU4, JU5 |
| 3 | 4066 | Package_DIP:DIP-14_W7.62mm | U1, U2, U3 |
| 2 | 5k6 | C128Diag:R_Axial_P12.70mm_Horizontal | R3, R4 |
| 2 | 74LS01 | Package_DIP:DIP-14_W7.62mm | U7, U8 |
| 2 | 74LS04 | Package_DIP:DIP-14_W7.62mm | U10, U11 |
| 1 | 10n | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C3 |
| 1 | 150 | C128Diag:R_Axial_P12.70mm_Horizontal | R1 |
| 1 | 1k | C128Diag:Potentiometer_Bourns_3339P_Vertical | P1 |
| 1 | 27128 | Package_DIP:DIP-28_W15.24mm | U13 |
| 1 | 330 | C128Diag:R_Axial_P12.70mm_Horizontal | R2 |
| 1 | 74HC08 | Package_DIP:DIP-14_W7.62mm | U9 |
| 1 | 74HC245 | Package_DIP:DIP-20_W7.62mm | U5 |
| 1 | 74HC374 | Package_DIP:DIP-20_W7.62mm | U6 |
| 1 | 74LS10 | Package_DIP:DIP-14_W7.62mm | U12 |
| 1 | Aud | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J5 |
| 1 | C64-Exp-Port | C128Diag:C64-Cart-C128Diag | U14 |
| 1 | CP1 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | CP2 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | Cas | C128Diag:Cassete-C128Diag | J4 |
| 1 | KB | Connector_PinHeader_2.54mm:PinHeader_1x13_P2.54mm_Vertical | J3 |
| 1 | LOGO | Logo:bigby | G*** |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U4 |
| 1 | Serial | C128Diag:PinHeader_1x02_P5.08mm_Vertical | J6 |
| 1 | UP | C128Diag:PinHeader_1x02_P5.08mm_Vertical | J7 |
Questions
How big is the C128Diag PCB?
It measures 145.3 × 129.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the C128Diag use?
61 parts, built around the 74HC245D, 74LS04PC, 74HC08D and 74HC374. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the C128Diag KiCad files?
From the hackup/C128Diag repository on GitHub, at the commit this page was made from: the board is C128Diag.kicad_pcb and its schematic C128Diag-Connectors.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the C128Diag design in my own project?
Its repository states no licence, so its author keeps all rights: ask hackup before reusing the design.
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