SAP-Plus RAM and MAR
About the SAP-Plus RAM and MAR PCB
SAP-Plus RAM and MAR 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 35 components from 29 distinct parts.
Other key parts include the CY62256-70PC, 74LS377, 74LS00 and 74LS245. By type, the board carries 20 diodes, 5 resistors, 4 ICs, 4 capacitors and 2 connectors.
From the project
Simple As Possible (SAP) 8-bit computer with a modular PCB design
* Update resistor network values to match LEDs
Main components on the SAP-Plus RAM and MAR
SAP-Plus RAM and MAR bill of materials (BOM)
35 components, 29 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CY62256-70PC | DIP-28_W15.24mm_Socket | U1 |
| 1 | 74LS377 | DIP-20_W7.62mm | U2 |
| 1 | 74LS00 | DIP-14_W7.62mm | U3 |
| 1 | 74LS245 | DIP-20_W7.62mm | U4 |
| 2 | Bus | PinHeader_1x40_P2.54mm_Vertical | J1, J2 |
| 1 | MX | LED_D3.0mm | D1 |
| 1 | RA0 | LED_D3.0mm | D2 |
| 1 | RA1 | LED_D3.0mm | D3 |
| 1 | RA2 | LED_D3.0mm | D4 |
| 1 | RA3 | LED_D3.0mm | D5 |
| 1 | RA4 | LED_D3.0mm | D6 |
| 1 | RA5 | LED_D3.0mm | D7 |
| 1 | RA6 | LED_D3.0mm | D8 |
| 1 | RA7 | LED_D3.0mm | D9 |
| 2 | WRITE | LED_D3.0mm | D10, D11 |
| 1 | READ | LED_D3.0mm | D12 |
| 1 | R0 | LED_D3.0mm | D13 |
| 1 | R1 | LED_D3.0mm | D14 |
| 1 | R2 | LED_D3.0mm | D15 |
| 1 | R3 | LED_D3.0mm | D16 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | R4 | LED_D3.0mm | D17 |
| 1 | R5 | LED_D3.0mm | D18 |
| 1 | R6 | LED_D3.0mm | D19 |
| 1 | R7 | LED_D3.0mm | D20 |
| 4 | 0.1uF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C1, C2, C3, C4 |
| 2 | R-RED | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R11 |
| 1 | R-GRN | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12 |
| 1 | R_GRN | R_Array_SIP10 | RN1 |
| 1 | R_RED | R_Array_SIP9 | RN2 |
SAP-Plus RAM and MAR design files
The KiCad project lives in the TomNisbet/sap-plus repository on GitHub; these links point at the commit this page was built from.
SAP-Plus RAM and MAR: common questions
How big is the SAP-Plus RAM and MAR PCB?
The SAP-Plus RAM and MAR measures 102 × 96 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the SAP-Plus RAM and MAR?
35 components, from 29 distinct parts. The full bill of materials is listed on this page.
Where can I download the SAP-Plus RAM and MAR design files?
From the TomNisbet/sap-plus repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the SAP-Plus RAM and MAR design in my own project?
Yes, under the terms of its MIT license, which TomNisbet chose for the repository.
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