Model 100 RAM Variables
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| Address | Description | Initialized |
|---|---|---|
| F5F0 | Start of System | 035A |
| F5F2 | SP upon power-down | 035C |
| F5F4 | HIMEM value | 035E |
| F5F6 | Power-on hook | 0360 |
| F5F9 | BCR Interrupt hook | 0363 |
| F5FC | UART DR hook | 0366 |
| F5FF | TP interrupt hook | 0369 |
| F602 | LPS interrupt hook | 036C |
| F604 | Power-on hook | 036F |
| F60F | OptROM hook | 0379 |
