Prototype 8088
About the Prototype 8088 PCB
Prototype 8088 is an open source PCB design by miselin, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board measuring 144.8 × 184.1 mm, with 69 components from 33 distinct parts.
Other key parts include the 8088, 74LS573, 74HC245, W27C512 BIOS ROM and 74LS138. By type, the board carries 23 capacitors, 20 ICs, 12 resistors, 8 connectors, 2 switches and 2 test points.
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 Prototype 8088
Prototype 8088 bill of materials (BOM)
69 components, 33 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 8088 | DIP-40_W15.24mm_Socket | U1 |
| 3 | 74LS573 | DIP-20_W7.62mm_Socket | U3, U4, U5 |
| 1 | 74HC245 | DIP-20_W7.62mm_Socket | U6 |
| 1 | W27C512 BIOS ROM | DIP-28_W15.24mm_Socket | U7 |
| 4 | 74LS138 | DIP-16_W7.62mm_Socket | U8, U9, U10, U28 |
| 1 | 74LS02 | DIP-14_W7.62mm_Socket | U11 |
| 1 | 8259 PIC MASTER | DIP-28_W15.24mm_Socket | U17 |
| 1 | 8254 PIT | DIP-24_W15.24mm_Socket | U18 |
| 1 | 74LS32 | DIP-14_W7.62mm_Socket | U24 |
| 1 | 74HC74 | DIP-14_W7.62mm_Socket | U26 |
| 1 | 8284 CLOCK GENERATOR | DIP-18_W7.62mm_Socket | U27 |
| 1 | AS6C1008-55PCN | DIP-32_W15.24mm_Socket | U30 |
| 1 | 74LS248 | DIP-16_W7.62mm_Socket | U35 |
| 1 | HDSP-A151 | HDSP-A151 | U36 |
| 1 | 74LS77 | DIP-14_W7.62mm_Socket | U37 |
| 1 | 14.31818 MHz Crystal | Crystal_HC49-4H_Vertical | Y1 |
| 1 | Conn_02x10_Counter_Clockwise | PinSocket_2x10_P2.54mm_Vertical | J1 |
| 3 | Conn_01x08 | PinSocket_1x08_P2.54mm_Vertical | J2, J3, J9 |
| 1 | Conn_02x01_Row_Letter_First | PinHeader_2x01_P2.54mm_Vertical | J4 |
| 3 | Conn_01x04 | PinSocket_1x04_P2.54mm_Vertical | J6, J7, J8 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SMD_4.6x2.8mm_h2.5mm | SW_PUSH_6mm_H4.3mm | SW1 |
| 1 | ~ | SW_PUSH_6mm_H4.3mm | SW2 |
| 2 | TestPoint | PinHeader_1x01_P2.54mm_Vertical | TP10, TP14 |
| 1 | Red | LED_D3.0mm | D4 |
| 19 | 0.1uF 20% Ceramic | C_Disc_D3.8mm_W2.6mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7, C11 +11 |
| 2 | 10 uF 20% 10V Ceramic | C_Disc_D3.8mm_W2.6mm_P2.50mm | C8, C10 |
| 1 | 100 uF 20% 35V Electrolytic | CP_Radial_D6.3mm_P2.50mm | C23 |
| 1 | 30 pF 1% 10V Ceramic | C_Disc_D3.8mm_W2.6mm_P2.50mm | C29 |
| 2 | 10k | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R1, R32 |
| 2 | 510 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R34, R35 |
| 2 | 150 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R61, R62 |
| 1 | 300 | R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | R67 |
| 5 | R_Network08 | R_Array_SIP9 | RN1, RN2, RN3, RN4, RN6 |
Prototype 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.
Prototype 8088: common questions
How big is the Prototype 8088 PCB?
The Prototype 8088 measures 144.8 × 184.1 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Prototype 8088?
69 components, from 33 distinct parts. The full bill of materials is listed on this page.
Where can I download the Prototype 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 Prototype 8088 design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which miselin chose for the repository.
