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Ilia Sharin 2026-04-26 14:46:18 -04:00
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06_exec_os/resident_modules.md
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@ -4,7 +4,7 @@
## Overview
AmigaOS ROM and disk-resident modules (libraries, devices, resources) identify themselves via a **RomTag** structure. At boot, exec scans the Kickstart ROM and any loaded segments for RomTags and initialises every module it finds. The RomTag system is how the kernel discovers and bootstraps itself — exec.library, graphics.library, dos.library, and all ROM-resident code use this mechanism.
AmigaOS ROM and disk-resident modules (libraries, devices, resources) identify themselves via a **RomTag** structure. At boot, exec scans the Kickstart ROM and any loaded segments for RomTags and initializes every module it finds. The RomTag system is how the kernel discovers and bootstraps itself — exec.library, graphics.library, dos.library, and all ROM-resident code use this mechanism.
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@ -56,7 +56,7 @@ struct Resident {
UBYTE rt_Flags; /* RTF_* flags */
UBYTE rt_Version; /* module version number */
UBYTE rt_Type; /* NT_LIBRARY, NT_DEVICE, NT_RESOURCE, ... */
BYTE rt_Pri; /* initialisation priority (higher = earlier) */
BYTE rt_Pri; /* initialization priority (higher = earlier) */
char *rt_Name; /* module name string, e.g. "dos.library" */
char *rt_IdString; /* human-readable ID, e.g. "dos.library 40.1" */
APTR rt_Init; /* init function or InitTable pointer */
@ -97,7 +97,7 @@ struct Resident {
---
## RTF_AUTOINIT — Automatic Initialisation
## RTF_AUTOINIT — Automatic Initialization
When `RTF_AUTOINIT` is set, `rt_Init` points to an `InitTable`:
@ -143,7 +143,7 @@ UWORD dataTable[] = {
## ROM Scan at Boot
During exec initialisation:
During exec initialization:
1. Walk from Kickstart base (`$F80000` for 512K ROM, `$FC0000` for 256K) upward
2. Search for the `$4AFC` magic word at even addresses