RC6802 CPU
About the RC6802 CPU PCB
RC6802 CPU is an open source PCB design by tebl, published on GitHub under the CERN-OHL-1.2 license. It is a 2-layer board measuring 99.1 × 99.1 mm, with 53 components from 30 distinct parts.
Other key parts include the MC6802, HM62256BLP-7, 28C256, 74LS00 and 74LS138. By type, the board carries 12 resistors, 11 capacitors, 8 ICs, 8 diodes, 5 jumpers and 4 modules.
It belongs with the retro computing designs in this gallery.
From the project
Computer based on the Motorola 6802 processor, called RC6802 Microchicken as it's an adaption of the one found in a computer projects book by Daniel Metzger.
One of my most enjoyable reads the past year has been "22 micro-computer projects - to build, learn and learn" by Daniel L. Metzger, the Microchicken-computer is described in detail within it and so I sought to build one myself. The computer has been designed as a set of smaller modules, for an overall description a listing of the available modules - see the main project README!
Main components on the RC6802 CPU
RC6802 CPU bill of materials (BOM)
53 components, 30 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MC6802 | DIP-40_W15.24mm_Socket | U1 |
| 1 | HM62256BLP-7 | DIP-28_W15.24mm_Socket | U2 |
| 1 | 28C256 | DIP-28_W15.24mm_Socket | U3 |
| 1 | 74LS00 | DIP-14_W7.62mm_Socket | U4 |
| 2 | 74LS138 | DIP-16_W7.62mm_Socket | U5, U7 |
| 1 | MC6821 | DIP-40_W15.24mm_Socket | U6 |
| 1 | 74LS240 | DIP-20_W7.62mm_Socket | U8 |
| 4 | Mounting | 1pin | M1, M2, M3, M4 |
| 1 | 4MHz | Crystal_HC49-U_Vertical | Y1 |
| 1 | RC6802_Backplane | Pin_Header_Angled_1x39_Pitch2.54mm | J1 |
| 1 | RC6802_UI_Port | Pin_Header_Straight_2x20_Pitch2.54mm | J2 |
| 1 | BARREL_JACK | BARREL_JACK | J3 |
| 1 | DECODED | Pin_Header_Straight_1x03_Pitch2.54mm | J4 |
| 1 | RAM_EN | Pin_Header_Straight_1x03_Pitch2.54mm | JP1 |
| 1 | RAM_SEL | Pin_Header_Straight_1x03_Pitch2.54mm | JP2 |
| 1 | LED_EN | Pin_Header_Straight_1x03_Pitch2.54mm | JP3 |
| 1 | A13 | Pin_Header_Straight_1x03_Pitch2.54mm | JP7 |
| 1 | A14 | Pin_Header_Straight_1x03_Pitch2.54mm | JP8 |
| 1 | HALT | LED_D5.0mm | D1 |
| 1 | RESET | LED_D5.0mm | D2 |
Show 10 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | NMI | LED_D5.0mm | D3 |
| 1 | IRQ | LED_D5.0mm | D4 |
| 1 | I/O | LED_D5.0mm | D5 |
| 1 | R/W | LED_D5.0mm | D6 |
| 1 | VMA | LED_D5.0mm | D7 |
| 1 | E | LED_D5.0mm | D8 |
| 9 | 100nF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 +1 |
| 2 | 22pF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C9, C11 |
| 4 | 3k3 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4 |
| 8 | 220 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R6, R7, R8, R9, R10, R11, R12 |
RC6802 CPU design files
The KiCad project lives in the tebl/RC6802-Microchicken repository on GitHub; these links point at the commit this page was built from.
RC6802 CPU: common questions
How big is the RC6802 CPU PCB?
The RC6802 CPU measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RC6802 CPU?
53 components, from 30 distinct parts. The full bill of materials is listed on this page.
Where can I download the RC6802 CPU design files?
From the tebl/RC6802-Microchicken repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the RC6802 CPU design in my own project?
Yes, under the terms of its CERN-OHL-1.2 license, which tebl chose for the repository.
More boards in RC6802-Microchicken
Similar boards
OpenTendo
Redherring32
196.3 × 118.7 mm93 parts2LTAPR-OHL-1.0850
MCL86jr
MicroCoreLabs
56.1 × 57.1 mm66 parts4LNo license532
24pin flex interposer
Wren6991
29 × 32 mm3 parts2LNo license508
Sram dev board
50 × 50 mm12 parts2LNo license508
TRS-80 Color Computer 3
baldengineer
280 × 155.3 mm204 parts2LCC-BY-4.0442
Commodore Plus 4
284.7 × 158.9 mm212 parts2LCC-BY-4.0442