Sbc 8088
About the Sbc 8088 PCB
Sbc 8088 is an open source AVR/Arduino PCB design by miselin, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 243.8 × 243.8 mm, with 206 components from 64 distinct parts.
Its main chip is the ATtiny13A-PU, from the AVR/Arduino family. Other key parts include the 74LS573, 74LS92, 7406, PCF8584 and 75477. By type, the board carries 72 capacitors, 50 resistors, 36 ICs, 21 connectors, 9 test points and 6 fuses.
From the project
The M88 Computer
This repository contains the KiCad project(s) and ROM source code for the M88 computer project. Learn more about the project at https://m88.computer.
The top-level KiCad project is the main KiCad project for the M88's Micro-ATX motherboard.
The isai2c` directory contains a KiCad project for an ISA-to-I2C bridge, designed around readily available parts with only one SMT IC.
Main components on the Sbc 8088
Sbc 8088 bill of materials (BOM)
206 components, 64 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 74LS573 | DIP-20_W7.62mm_Socket | U2, U12, U15, U29 |
| 1 | 74LS92 | DIP-14_W7.62mm_Socket | U3 |
| 1 | 7406 | DIP-14_W7.62mm_Socket | U4 |
| 1 | PCF8584 | DIP-20_W7.62mm_Socket | U5 |
| 1 | 75477 | DIP-8_W7.62mm_Socket | U6 |
| 1 | 8088 | DIP-40_W15.24mm_Socket | U7 |
| 5 | 74LS138 | DIP-16_W7.62mm_Socket | U8, U11, U24, U40, U45 |
| 1 | VT82C42 PS2 CONTROLLER | DIP-40_W15.24mm_Socket | U9 |
| 1 | 74LS125 | DIP-14_W7.62mm_Socket | U10 |
| 1 | 74LS244 | DIP-20_W7.62mm_Socket | U13 |
| 6 | AS6C1008-55PCN | DIP-32_W15.24mm_Socket | U14, U33, U34, U35, U36, U43 |
| 1 | 74HC245 | DIP-20_W7.62mm_Socket | U16 |
| 1 | 74LS175 | DIP-16_W7.62mm_Socket | U17 |
| 1 | 8259 PIC MASTER | DIP-28_W15.24mm_Socket | U19 |
| 2 | 74LS247 | DIP-16_W7.62mm_Socket | U21, U28 |
| 1 | Low Nibble - HDSP-A151 | HDSP-A151 | U22 |
| 1 | 8254 PIT | DIP-24_W15.24mm_Socket | U23 |
| 1 | High Nibble - HDSP-A151 | HDSP-A151 | U26 |
| 1 | 74LS02 | DIP-14_W7.62mm_Socket | U27 |
| 1 | 8284 CLOCK GENERATOR | DIP-18_W7.62mm_Socket | U32 |
Show 44 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | W27C512 BIOS ROM | DIP-28_W15.24mm_Socket | U38 |
| 1 | ATtiny13A-PU | DIP-8_W7.62mm | U39 |
| 1 | 74LS08 | DIP-14_W7.62mm_Socket | U42 |
| 2 | CXO_DIP8 | DIP-8_W7.62mm_Socket | X1, X2 |
| 1 | 24 MHz Crystal | Crystal_HC49-4H_Vertical | Y1 |
| 2 | Mini-DIN-6 | 57492651 | J1, J2 |
| 6 | S4B-PH-K-S(LF)(SN) Conn_01x04 | JST_PH_S4B-PH-K_1x04_P2.00mm_Horizontal | J3, J9, J14, J15, J16, J17 |
| 4 | 7-5530843-0 8-bit ISA Bus connector | 755308430_ISA | J4, J5, J6, J11 |
| 1 | PC Speaker | PinHeader_1x04_P2.54mm_Vertical | J7 |
| 1 | FP Power Switch | PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | 44206-0007 ATX-24 | 44206-0007_1 | J10 |
| 1 | FP Power LED | PinHeader_1x02_P2.54mm_Vertical | J12 |
| 1 | FP Reset Switch | PinHeader_1x02_P2.54mm_Vertical | J13 |
| 2 | 47053-1000 | 470531000 | J18, J19 |
| 1 | UMA Enable | PinHeader_1x02_P2.54mm_Vertical | J20 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J21 |
| 5 | MF-RHT100-0 Bourns MF-RHT100 1A hold | Fuse_Bourns_MF-RHT100 | F1, F2, F4, F5, F6 |
| 1 | MF-RHT200-0 Bourns MF-RHT200 2A hold | Fuse_Bourns_MF-RHT200 | F3 |
| 2 | ~ | SW_PUSH_6mm_H4.3mm | SW1, SW2 |
| 9 | TestPoint | PinHeader_1x01_P2.54mm_Vertical | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +1 |
| 1 | Green | LED_D3.0mm | D2 |
| 1 | Red | LED_D3.0mm | D3 |
| 5 | FerriteBead | L_0805_2012Metric | FB1, FB2, FB3, FB4, FB5 |
| 13 | 4.7UF 16V 20% | CP_Elec_4x4.5 | C1, C12, C13, C18, C19, C21, C23, C27 +5 |
| 38 | 0.1uF 20% Ceramic | C_0805_2012Metric | C2, C3, C4, C5, C6, C9, C15, C17 +30 |
| 8 | 10UF 16V 20% | CP_Elec_5x4.5 | C7, C8, C10, C11, C32, C34, C36, C41 |
| 2 | 10 uF 20% 10V Ceramic | C_0805_2012Metric | C14, C62 |
| 3 | 30 pF 1% 10V Ceramic | C_0805_2012Metric | C16, C47, C57 |
| 1 | 0.01uF 20% Ceramic | C_0805_2012Metric | C20 |
| 6 | 470 uF 20% 35V Electrolytic | CP_Elec_6.3x7.7 | C39, C63, C64, C65, C67, C68 |
| 1 | 100 uF 20% 35V Electrolytic | CP_Elec_6.3x7.7 | C66 |
| 2 | 220 | R_0805_2012Metric | R1, R3 |
| 21 | 10k | R_0805_2012Metric | R2, R5, R6, R7, R8, R9, R10, R27 +13 |
| 1 | 33 | R_0805_2012Metric | R4 |
| 2 | 510 | R_0805_2012Metric | R24, R25 |
| 1 | 1k | R_0805_2012Metric | R26 |
| 3 | 300 | R_0805_2012Metric | R31, R33, R49 |
| 5 | 22 | R_0805_2012Metric | R34, R47, R50, R51, R52 |
| 4 | 100k 0.5W | R_1210_3225Metric | R41, R42, R43, R44 |
| 1 | 27 | R_0805_2012Metric | R53 |
| 2 | 2.2k | R_0603_1608Metric | R59, R60 |
| 3 | 10k (bussed) | R_Array_SIP5 | RN1, RN7, RN8 |
| 1 | 4.7k | R_Array_SIP7 | RN2 |
| 4 | 10k (bussed) | R_Array_SIP9 | RN3, RN4, RN5, RN6 |
Sbc 8088 design files
The KiCad project lives in the miselin/M88 repository on GitHub; these links point at the commit this page was built from.
- Layoutsbc_8088.kicad_pcb
- Schematicsbc_8088.kicad_sch
Sbc 8088: common questions
What microcontroller does the Sbc 8088 use?
The Sbc 8088 is built around the ATtiny13A-PU, from the AVR/Arduino family.
How big is the Sbc 8088 PCB?
The Sbc 8088 measures 243.8 × 243.8 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Sbc 8088?
206 components, from 64 distinct parts. The full bill of materials is listed on this page.
Where can I download the Sbc 8088 design files?
From the miselin/M88 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Sbc 8088 design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which miselin chose for the repository.
Can I test firmware for the Sbc 8088 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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