4 layers127 × 88.9 mm
8 layers304.8 × 190.5 mm
Motherboard
WolfNet-Computing/WolfNet-65C02-WBC1A 65(C)02 WorkBench Computer
- Size
- 304.8 × 190.5 mm
- Copper layers
- 8
- Thickness
- 1.6 mm
- Parts
- 75
- Nets
- 181
- Pads
- 714
- Tracks, vias
- 1,846, 235
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Nov 2021
- Updated
- 1 Sep 2026
Overview
Motherboard is an open-source printed circuit board by WolfNet-Computing, from the WolfNet-Computing/WolfNet-65C02-WBC repository on GitHub. It is an 8-layer board of 304.8 × 190.5 mm with 75 parts on 181 nets, routed with 1,846 tracks and 235 vias.
It is built around the ATF22V10C-7PX, AS6C4008-55PCN and DS1813-5+, with the 74HCT74D, ACO-18.432MHZ-EK and PWR220T-20-5R00J among its other parts. Its parts include 15 capacitors, 11 resistors, 10 connectors, 5 ICs and 3 diodes. It belongs with the computers and single-board computers boards and the FPGA and CPLD boards of this library.
Main components
6
ATF22V10C-7PX
PDIP-245V EEPLD PDIP-24 Programmable Logic Device (CPLDs/FPGAs) ROHSMicrochip TechnologyProgrammable Logic Device (CPLDs/FPGAs)
AS6C4008-55PCN
PDIP-320℃~+70℃ 2.7V~5.5V 30mA 4Mbit 4uA 55ns Parallel Port (Parallel) PDIP-32 SRAM ROHSAlliance MemorySRAMDS1813-5+
TO-92-3-40℃~+85℃@(Ta) 1 1.2V~5.5V 150ms 4.75V Active Low No Open Drain Voltage Monitor Yes TO-92-3 Supervisor and Reset ICs ROHSAnalog DevicesSupervisor And Reset ICs
74HCT74D
SOIC-14-40℃~+125℃ 1 2 3.5pF 3ns 4.5V~5.5V 40uA 44ns@4.5V,50pF 4mA 4mA 59MHz 5ns 74HCT Series Asynchronous Complementary D-Type Rising Edge Set and Reset SO-14 Flip Flops ROHSNexperia74 Series
ACO-18.432MHZ-EK
DIP-4-20℃~+70℃ 18.432MHz 30mA 5V HCMOS、TTL DIP-4 Crystal Oscillators ROHSAbraconCrystal Oscillators
PWR220T-20-5R00J
TO-220-2-55℃~+155℃ 20W 5Ω Thick Film Resistor ±100ppm/℃ ±5% TO-220-2 Through Hole Resistors ROHSBournsThrough Hole Resistors
README
README.mdParts
75| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 100 nF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19 |
| 6 | 3.3k Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R11, R18, R19, R20, R21 |
| 5 | Expansion_Connector | PC:Expansion_Connector_Motherboard | J5, J6, J7, J8, J9 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H5, H6 |
| 3 | LED | LED_THT:LED_D5.0mm | D1, D2, PWR_OK1 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3, R4 |
| 2 | Jumper_3_Bridged12 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1, JP2 |
| 2 | WD65C22N | Package_DIP:DIP-40_W15.24mm_Socket_LongPads | 65SIB/MM1, GPIO_CTRL1 |
| 1 | 220 Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9 |
| 1 | 28C010 | Socket:DIP_Socket-32_W11.9_W12.7_W15.24_W17.78_W18.5_3M_232-1285-00-0602J | U6 |
| 1 | 28C64 | Socket:DIP_Socket-28_W11.9_W12.7_W15.24_W17.78_W18.5_3M_228-1277-00-0602J | SHARED_ROM1 |
| 1 | 3.3k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | 65SIB_Connector | Connector_IDC:IDC-Header_2x10-1MP_P2.54mm_Latch6.5mm_Vertical | J2 |
| 1 | 74HCT137 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | 65SIB_LATCH1 |
| 1 | 74HCT74 | Package_DIP:DIP-14_W7.62mm_Socket_LongPads | CLK_DIV1 |
| 1 | ACO-1.8432MHz | Oscillator:Oscillator_DIP-14 | UART_CLK1 |
| 1 | ACO-12MHz | Oscillator:Oscillator_DIP-14 | USB_CLK1 |
| 1 | ACO-8MHz | Oscillator:Oscillator_DIP-14 | X1 |
| 1 | AS6C4008-55PCN | Package_DIP:DIP-32_W15.24mm | U2 |
| 1 | ATF22V10C | Package_DIP:DIP-24_W7.62mm_Socket_LongPads | U3 |
| 1 | ATX-20 | Connector_Molex:Molex_Mini-Fit_Jr_5566-20A_2x10_P4.20mm_Vertical | J1 |
| 1 | C | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C2 |
| 1 | CLK/1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP4 |
| 1 | CLK/2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP5 |
| 1 | CLK/4 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP6 |
| 1 | C_Polarized | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | DB9_Header | PC:DB9_Header | J3 |
| 1 | DS1813 | Package_TO_SOT_THT:TO-92 | U4 |
| 1 | GPIO_Connector | Connector_PinHeader_2.54mm:PinHeader_2x11_P2.54mm_Vertical | J4 |
| 1 | IRQ_EN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | IRQ_EN1 |
| 1 | LOGO | WolfNet:WolfNet-Logo_silkscreen | G*** |
| 1 | MAX235 | Package_DIP:DIP-24_W15.24mm_Socket_LongPads | UART-RS232 |
| 1 | MCP2200-I-SO | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U1 |
| 1 | NMI_EN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | NMI_EN1 |
| 1 | PROCESSOR RESET | Button_Switch_THT:SW_PUSH_6mm_H4.3mm | RESET1 |
| 1 | PWR220T-20-5R00J | Package_TO_SOT_THT:TO-220-2_Horizontal_TabDown | R10 |
| 1 | SW | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | NMI/IRQ1 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | USB_B_Mini | Connector_USB:USB_Mini-B_Tensility_54-00023_Vertical | J10 |
| 1 | W65C51 | Package_DIP:DIP-28_W15.24mm_Socket_LongPads | UART1 |
| 1 | WD65C02 | Package_DIP:DIP-40_W15.24mm_Socket_LongPads | CPU1 |
The 70 most common of 75 parts.
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Questions
How big is the Motherboard PCB?
It measures 304.8 × 190.5 mm and has 8 copper layers, 1.6 mm thick.
What parts does the Motherboard use?
75 parts, built around the ATF22V10C-7PX, AS6C4008-55PCN, DS1813-5+ and 74HCT74D. 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 Motherboard KiCad files?
From the WolfNet-Computing/WolfNet-65C02-WBC repository on GitHub, at the commit this page was made from: the board is Motherboard/Motherboard.kicad_pcb and its schematic Debug/Debug.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Motherboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask WolfNet-Computing before reusing the design.