Table of Contents
Modified RC2014 Bus for CRC65
Introduction
CRC65 has an expansion bus that's based on RC2014 bus. It is a single-row, 39-pin, right-angle male connector. The addresses, data and power signals are same as RC2014, many of the control signals are also the same. The different signals are 6502-specific.
Signal Definiton
| Pin Number | Signal Name |
|---|---|
| 1 | Address 15, A15 |
| 2 | Address 15, A14 |
| 3 | Address 15, A13 |
| 4 | Address 15, A12 |
| 5 | Address 15, A11 |
| 6 | Address 15, A10 |
| 7 | Address 15, A9 |
| 8 | Address 15, A8 |
| 9 | Address 15, A7 |
| 10 | Address 15, A6 |
| 11 | Address 15, A5 |
| 12 | Address 15, A4 |
| 13 | Address 15, A3 |
| 14 | Address 15, A2 |
| 15 | Address 15, A1 |
| 16 | Address 15, A0 |
| 17 | Ground |
| 18 | VCC |
| 19 | Spare |
| 20 | Reset |
| 21 | PHI2 Clock |
| 22 | Interrupt, IRQ |
| 23 | Non-maskable interrupt, NMI |
| 24 | Read/write, RWB |
| 25 | RDY |
| 26 | |
| 27 | Data, D0 |
| 28 | Data, D1 |
| 29 | Data, D2 |
| 30 | Data, D3 |
| 31 | Data, D4 |
| 32 | Data, D5 |
| 33 | Data, D6 |
| 34 | Data, D7 |
