Microcode
About the Microcode PCB
Microcode is an open source PCB design by TomNisbet, published on GitHub under the MIT license. It is a 2-layer board measuring 102 × 96 mm, with 59 components from 35 distinct parts.
Other key parts include the 28C256. By type, the board carries 24 diodes, 24 resistors, 5 connectors, 3 ICs and 3 capacitors.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
NQSAP 8-bit computer PCB version
A multi-PCB version of the NQSAP 8-bit computer
Visit the NQSAP-PCB documentation pages for detailed design notes and schematics.
Main components on the Microcode
Microcode bill of materials (BOM)
59 components, 35 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 28C256 | DIP-28_W15.24mm_Socket | U1, U2, U3 |
| 2 | Bus | PinHeader_1x40_P2.54mm_Vertical | J1, J2 |
| 1 | IC-LT | PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | IC-RT | PinHeader_1x08_P2.54mm_Vertical | J5 |
| 1 | IC-RB | PinHeader_1x08_P2.54mm_Vertical | J6 |
| 1 | WR3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | WR2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | WR1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | WR0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4 |
| 1 | RR3 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D5 |
| 1 | RR2 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D6 |
| 1 | RR1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D7 |
| 1 | RR0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D8 |
| 1 | FN | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D9 |
| 1 | FV | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D10 |
| 1 | FZ | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D11 |
| 1 | FC | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D12 |
| 1 | FB | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D13 |
| 1 | SE | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D14 |
| 1 | C1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D15 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D16 |
| 1 | CS | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D17 |
| 1 | CC | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D18 |
| 1 | M1 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D19 |
| 1 | M0 | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D20 |
| 1 | LF | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D21 |
| 1 | JE | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D22 |
| 1 | N | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D23 |
| 1 | PI | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D24 |
| 3 | 0.1uF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3 |
| 6 | R_RED | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R22, R24 |
| 4 | R_GRN | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6, R7, R8 |
| 6 | R_BLUE | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R10, R11, R12, R17, R18 |
| 7 | R_YEL | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13, R15, R16, R19, R20, R21, R23 |
| 1 | R_WHT | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
Microcode design files
The KiCad project lives in the TomNisbet/nqsap-pcb repository on GitHub; these links point at the commit this page was built from.
Microcode: common questions
How big is the Microcode PCB?
The Microcode measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Microcode?
59 components, from 35 distinct parts. The full bill of materials is listed on this page.
Where can I download the Microcode design files?
From the TomNisbet/nqsap-pcb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Microcode design in my own project?
Yes, under the terms of its MIT license, which TomNisbet chose for the repository.
More boards in nqsap-pcb
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NQSAP-PCB Instruction Register and Ring Counter
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Backplane
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AVR/ArduinoNQSAP Loader / Debugger and Clock
102 × 96 mm42 parts2LMIT18
Alu
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102 × 96 mm29 parts2LMIT18
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