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/*
**************************************************************************
*
* Boot-ROM-Code to load an operating system across a TCP/IP network.
*
* Module: memory.h
* Purpose: Definitions for boot rom memory layout
* Entries: None
*
**************************************************************************
*
* Copyright (C) 1995-1998 Gero Kuhlmann <gero@gkminix.han.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
**************************************************************************
*
* The memory layout of the bootrom looks like this:
*
* +------------------+ (00000:0)
* | Int & BIOS data | 2kB
* +------------------+ DOSSTART (00060:0)
* | DOS sim data | 62kB
* +------------------+ LOWMEM (01000:0)
* | OS loading area | 544kB
* +------------------+ HIGHMEM (09800:0)
* | Bootrom code | 32kB
* +------------------+ MEMEND (0A000:0)
* | Video memory |
* | Compressed ROM | 384kB
* | BIOS |
* +------------------+ EXTMEM (10000:0)
* | OS loading area |
* +------------------+ physical end of memory
*
*
* During initialization and decompression of the bootrom code (either
* out of the real rom or a floppy image), the lower OS loading area
* looks like this:
*
* +------------------+ LOWMEM (01000:0)
* | Decompressed ROM | 64kB
* +------------------+ FLOPMEM (03000:0)
* | Floppy image | 64kB
* +------------------+ FLOPEND (04000:0)
*
**************************************************************************
*
* These values have to be the same as those in the corresponding assembler
* include file!
*/
#define DOSSTART 0x00060L /* start of DOS data area */
#define LOWMEM 0x01000L /* beginning of OS loading area */
#define EXECMEM 0x01000L /* beginning of exec script load area */
#define FLOPMEM 0x02000L /* beginning of floppy loading area */
#define FLOPEND 0x03000L /* end of floppy loading area */
#define HIGHMEM 0x09800L /* end of OS loading area */
#define MEMEND 0x0A000L /* end of ram on typical PC system */
#define ROMSIZE 0x08000L /* max. size of rom area in bytes */
#define EXTMEM 0x10000L /* beginning of extended memory area */
/*
**************************************************************************
*
* The ROM startup code and the kernel image both need some values
* inserted at their beginning by binary patch programs. Define the
* offsets to those values from the beginning of each file.
*
* Note that these values have to correspond to the actual offsets
* in the corresponding assembler files (rom.asm and kernel.asm)!
*/
#define DATAOFS 0x00008L /* offset to special data */
/* Offsets into the ROM startup code */
#define ROMLENOFS 0x00002L /* offset to rom length byte */
#define ROMSIZEOFS DATAOFS + 0L /* offset to rom size in bytes */
#define ROMMAJOROFS DATAOFS + 2L /* offset to major version num */
#define ROMMINOROFS DATAOFS + 3L /* offset to minor version num */
#define ROMSEROFS DATAOFS + 4L /* offset to rom serial num */
#define ROMVECTOFS DATAOFS + 6L /* offset to bootrom vector */
/* Offsets into the kernel code */
#define KRNPRGOFS DATAOFS + 0L /* offset to prog list addr */
#define KRNTEXTOFS DATAOFS + 2L /* offset to kernel text size */
#define KRNDATAOFS DATAOFS + 4L /* offset to kernel data size */
#define KRNMAJOROFS DATAOFS + 6L /* offset to major version num */
#define KRNMINOROFS DATAOFS + 7L /* offset to minor version num */
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