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rosco_m68k RAM Expansion Board
4MB SRAM expansion board for the rosco_m68k retro computer. Expands your system memory with eight AS6C4008 512K×8 SRAM chips, providing the full 4 megabytes of fast static RAM addressable over the expansion bus. Perfect for running larger programs, heavier workloads, and memory-hungry applications on your 68k machine.
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SKU: ros-ram-board-tht-kit
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Components
40 parts- Capacitors
- Resistors
- Transistors
- Integrated Circuits
- IC Sockets
- Connectors & Switches
Components
40 parts- Capacitors
- Resistors
- Transistors
- Integrated Circuits
- IC Sockets
- Connectors & Switches
| Component | Details | Qty |
|---|---|---|
| Capacitors | ||
| 104 ceramic decoupling capacitor (C1-C9) | 100nF | 9 |
| 100uF bulk capacitor (C10, C11) | 100µF | 2 |
| Resistors | ||
| 10k resistor (R1) | 10 kOhm | 1 |
| 100k resistor (R2) | 100 kOhm | 1 |
| 4K7 pull-up resistor for jumpers (R3, R4, R5) | 4.7 kOhm | 3 |
| Transistors | ||
| NPN transistor for RnW/WnR inversion (Q1) | 2N3904 | 1 |
| Integrated Circuits | ||
| 512K x 8 SRAM (U1-U8) | AS6C4008-55PCN | 8 |
| PLD for chip select decoding (IC1) | ATF16V8BQL-15PU | 1 |
| IC Sockets | ||
| DIP Socket | — | 8 |
| DIP Socket | — | 1 |
| Connectors & Switches | ||
| Pin header | — | 1 |
| Pin header | — | 1 |
| Jumpers | — | 3 |