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56 lines
1.7 KiB
Markdown
56 lines
1.7 KiB
Markdown
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[← Home](../README.md) · [Boot Sequence](README.md)
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# Early Startup Control — Boot Options
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## Overview
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The **Early Startup Control** (ESC) menu appears when both mouse buttons are held during power-on or reset. It provides boot device selection, display mode override, and emergency recovery options.
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---
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## Activation
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- **Both mouse buttons held** before the boot screen hand animation completes
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- On A1200: hold both buttons during "floppy click" phase
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- Requires Kickstart 2.0+ (not available on 1.3)
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---
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## Menu Options (OS 3.1)
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```
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┌──────────────────────────────────┐
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│ EARLY STARTUP CONTROL │
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│ │
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│ Boot With No Startup-Sequence │
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│ Boot Standard │
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│ │
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│ Boot Device: │
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│ DF0: (pri 5) │
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│ DH0: (pri 0) │
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│ │
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│ Display Mode: │
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│ ● PAL ○ NTSC │
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│ │
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│ [BOOT] │
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└──────────────────────────────────┘
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```
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---
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## Recovery Scenarios
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| Scenario | Fix |
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|---|---|
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| Corrupted Startup-Sequence | Boot with No Startup-Sequence, then `ED S:Startup-Sequence` |
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| Wrong display mode (no image) | Hold both buttons → change PAL/NTSC |
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| Boot from floppy instead of HD | Select DF0: as boot device |
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| Assign loops / infinite boot | No Startup-Sequence → fix assigns manually |
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---
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## References
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- RKRM: Early Startup chapter
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- OS 3.1 AmigaGuide: `System/BootMenu`
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