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d17f333243
save 33 bytes by eliminating a switch for memory/UMB access modes. git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@822 6ac86273-5f31-0410-b378-82cca8765d1b
70 lines
2.9 KiB
C
70 lines
2.9 KiB
C
/****************************************************************/
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/* */
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/* mcb.h */
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/* */
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/* Memory Control Block data structures and declarations */
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/* */
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/* November 23, 1991 */
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/* */
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/* Copyright (c) 1995 */
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/* Pasquale J. Villani */
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/* All Rights Reserved */
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/* */
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/* This file is part of DOS-C. */
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/* */
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/* DOS-C is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU General Public License */
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/* as published by the Free Software Foundation; either version */
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/* 2, or (at your option) any later version. */
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/* */
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/* DOS-C is distributed in the hope that it will be useful, but */
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/* WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
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/* the GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public */
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/* License along with DOS-C; see the file COPYING. If not, */
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/* write to the Free Software Foundation, 675 Mass Ave, */
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/* Cambridge, MA 02139, USA. */
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/****************************************************************/
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#ifdef MAIN
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#ifdef VERSION_STRINGS
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static BYTE *mcb_hRcsId =
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"$Id$";
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#endif
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#endif
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#define LARGEST -1
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#define FIRST_FIT 0
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#define BEST_FIT 1
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#define LAST_FIT 2
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#define FIRST_FIT_UO 0x40
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#define BEST_FIT_UO 0x41
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#define LAST_FIT_UO 0x42
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#define FIRST_FIT_U 0x80
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#define BEST_FIT_U 0x81
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#define LAST_FIT_U 0x82
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#define FIT_U_MASK 0xc0
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#define FIT_MASK 0x3f
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#define MCB_NORMAL 0x4d
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#define MCB_LAST 0x5a
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#define DOS_PSP 0x0060 /* 0x0008 What? seg 8 =0:0080 */
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#define FREE_PSP 0
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#define MCB_SIZE(x) ((((LONG)(x))<<4)+sizeof(mcb))
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typedef UWORD seg;
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typedef UWORD offset;
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typedef struct {
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BYTE m_type; /* mcb type - chain or end */
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UWORD m_psp; /* owner id via psp segment */
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UWORD m_size; /* size of segment in paragraphs */
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BYTE m_fill[3];
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BYTE m_name[8]; /* owner name limited to 8 bytes */
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} mcb;
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