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/*
*
* (c) 2004,2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
.chip 68000
.equ sector_size, 512
.equ first_level_size, 2 * sector_size
.include "macos.i"
.include "32bitmode.i"
/******************************************************************************
*
* Structure: "Inside Macintosh: Files", p. 2-57
*
*****************************************************************************/
begin:
ID: .short 0x4C4B /* boot blocks signature */
Entry: bra start /* entry point to bootcode */
Version: .short 0x4418 /* boot blocks version number */
PageFlags: .short 0x00 /* used internally */
SysName: pString "Mac Bootloader" /* System filename */
ShellName: pstring "Copyright 2004" /* Finder filename */
Dbg1Name: pString "Laurent Vivier" /* debugger filename */
Dbg2Name: pString "Distributed " /* debugger filename */
ScreenName: pString "under GNU GPL " /* name of startup screen */
HelloName: pString "first level " /* name of startup program */
ScrapName: pString "version 1.2 " /* name of system scrap file */
CntFCBs: .short 10 /* number of FCBs to allocate */
CntEvts: .short 20 /* number of event queue elements */
Heap128K: .long 0x00004300 /* system heap size on 128K Mac */
Heap256K: .long 0x00008000 /* used internally */
SysHeapSize: .long 0x00020000 /* system heap size on all machines */
.ifdef SCSI_SUPPORT
.include "scsi.i"
.else
.include "floppy.i"
.endif
/******************************************************************************
*
* start : load the second stage
*
* start is called from the boot block header
*
* call PBReadSync() to read blocks from floppy
* as described in param_block
*
*****************************************************************************/
.align 4
start:
moveal SysZone,%a0
addal %pc@(SysHeapSize),%a0
SetApplBase
movel SysZone,TheZone
/* test if we are in 32bit mode, otherwise reboot in 32bit mode */
switch32bitmode
/* buffer size to store second stage booter */
get_second_size %d0
/* Allocate Memory for second stage loader */
add.l #4, %d0
NewPtr
move.l %a0, %d0
bne malloc_ok
move.l #1, %d0
SysError
malloc_ok:
add.l #3, %d0
and.l #0xFFFFFFFC.l, %d0
/* load second stage */
load_second
/* call second stage bootloader */
jmp (%a0)
PRAM_buffer:
.long 0
end:
/******************************************************************************
*
* Filler: the boot block is 2 floppy blocks
* as seen on the disk of utilities of MacOS 7.6, we fill with 0xda
*
*****************************************************************************/
.ifdef SCSI_SUPPORT
.fill first_level_size - (end - begin) - 10, 1, 0xda
container_end:
block_size: .short 0
unit_id: .short 0
second_size: .long 0
max_blocks: .short container_end - end
.else
.fill first_level_size - (end - begin), 1, 0xda
.endif
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