Communications Register Unit
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Well-known base addresses
CRU addresses are usually configurable on the device board using DIP switches. Some addresses are well-known for specific devices.
| Address | System | Device |
|---|---|---|
| 0800 | all | Super Space cartridge |
| 0F00 | all | SGCPU mapper |
| 1000 | all | IDE adapter, Myarc/Foundation memory expansion |
| 1100 | all | Various disk controllers |
| 1300 | all | Serial/parallel interface (RS232/PIO) |
| 1400 | all | EVPC (Enhanced Video Processor Card) |
| 1500 | all | Second serial/parallel interface (RS232/PIO) |
| 1600 | all | USB Smartmedia |
| 1900 | all | Myarc/Foundation memory expansion |
| 1B00 | all | HSGPL (High-Speed GPL card) |
| 1E00 | all | SuperAMS memory expansion, SGCPU SAMS emulation |
| 1F00 | all | P-Code card |
| 2700 | 99/8 | Internal DSR |