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LC //e Card - I/O Addresses
| Address | R/W | Use |
|---|---|---|
| $C028 | W | Switch to main firmware |
| $C029 | R/W | Switch to alt firmware bank |
| $C02B | R/W | Bit 4 = set CPU speed (1=fast).* Bit 3 = Set Alt FW Bank D1/D2 (undocumented). |
| $C05C | R | Bit 2 = speed selected in option panel (1=fast).* |
* See TN.AIIE.10.