source: buchla-68k/include/biosdefs.h@ fa38804

Last change on this file since fa38804 was fa38804, checked in by Thomas Lopatic <thomas@…>, 7 years ago

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1/*
2 ============================================================================
3 biosdefs.h -- Buchla 700 BIOS and XBIOS definitions
4 Version 22 -- 1988-04-11 -- D.N. Lynx Crowe
5 ============================================================================
6*/
7
8#pragma once
9
10#include "stdint.h"
11
12#define BIOS trap13
13#define XBIOS trap14
14
15/* BIOS functions */
16
17/* function 0 unused (getmpb) */
18
19#define B_RDAV 1
20#define B_GETC 2
21#define B_PUTC 3
22#define B_RDWR 4
23#define B_SETV 5
24
25/* function 6 unused (tickcal) */
26
27#define B_GBPB 7
28#define B_THRE 8
29#define B_MCHG 9
30#define B_DMAP 10
31
32/* function 11 unused (shift) */
33
34/* XBIOS functions */
35
36#define X_PIOREC 0
37#define X_SETPRT 1
38#define X_FLOPRD 2
39#define X_FLOPWR 3
40#define X_FORMAT 4
41#define X_VERIFY 5
42#define X_PRBOOT 6
43#define X_RANDOM 7
44#define X_ANALOG 8
45#define X_CLRAFI 9
46#define X_APICHK 10
47#define X_MTDEFS 11
48
49/* device unit numbers */
50
51#define PRT_DEV 0
52#define AUX_DEV 1
53#define CON_DEV 2
54#define MC1_DEV 3
55#define MC2_DEV 4
56
57/*
58 ============================================================================
59 bpb -- BIOS parameter block
60 ============================================================================
61*/
62
63
64struct bpb { /* BIOS parameter block returned by B_GBPB */
65
66 uint16_t recsiz; /* physical sector size in bytes */
67 uint16_t clsiz; /* cluster size in sectors */
68 uint16_t clsizb; /* cluster size in bytes */
69 uint16_t rdlen; /* root directory length in sectors */
70 uint16_t fsiz; /* FAT size in sectors */
71 uint16_t fatrec; /* sector number of 1st sector of 2nd FAT */
72 uint16_t datrec; /* sector number of 1st data sector */
73 uint16_t numcl; /* number of data clusters on disk */
74 uint16_t bflags; /* flags */
75 uint16_t ntracks; /* number of tracks */
76 uint16_t nsides; /* number of sides (heads) */
77 uint16_t dspc; /* sectors per cylinder */
78 uint16_t dspt; /* sectors per track */
79 uint16_t hidden; /* number of hidden files */
80 int8_t serno[3]; /* disk serial number */
81 int8_t nada; /* --- filler - nothing here --- */
82};
83
84#define BPBSIZE 32 /* length of a BPB */
85
86#define B_FAT16 0x0001 /* flag for using 16 bit FAT entries */
87
88/*
89 ============================================================================
90 dirent -- Directory entry
91 ============================================================================
92*/
93
94struct dirent { /* Directory entry */
95
96 int8_t fname[8]; /* file name */
97 int8_t fext[3]; /* file extension */
98 int8_t atrib; /* attribute byte */
99 int8_t unused[10]; /* unused space */
100 uint16_t crtime; /* 'LLHH' creation time */
101 uint16_t crdate; /* 'LLHH' creation date */
102 uint16_t bclust; /* 'LLHH' starting cluster number */
103 int32_t flen; /* 'LLHH' file length */
104};
105
106#define DENTSIZE (sizeof (struct dirent))
107
108#define F_RDONLY 0x01 /* Read only file */
109#define F_HIDDEN 0x02 /* Hidden file */
110#define F_SYSTEM 0x04 /* System file */
111#define F_VOLUME 0x08 /* Volume label */
112#define F_SUBDIR 0x10 /* Sub-directory */
113#define F_ARCHIV 0x20 /* Archived */
114
115/*
116 ============================================================================
117 fcb -- File Control Block
118 ============================================================================
119*/
120
121struct fcb { /* file control block */
122
123 struct dirent de; /* directory entry image for file */
124 uint16_t modefl; /* fcb flags */
125 uint16_t clsec; /* current sector in cluster */
126 uint16_t curcls; /* current cluster */
127 uint16_t offset; /* current offset into sector */
128 int32_t curlsn; /* current logical sector number in file */
129 int32_t curdsn; /* current logical sector number on disk */
130 int32_t curlen; /* current file length in bytes */
131 int32_t asects; /* allocated file length in sectors */
132};
133
134#define FC_EOF 0x8000 /* end of file */
135#define FC_BAD 0x4000 /* bad FAT entry encountered */
136#define FC_ERR 0x2000 /* error encountered */
137#define FC_OPN 0x1000 /* file open */
138
139#define FC_CR 0x0800 /* create mode */
140#define FC_AP 0x0400 /* append mode */
141#define FC_WR 0x0200 /* write mode */
142#define FC_RD 0x0100 /* read mode */
143
144#define FC_EX 0x0080 /* exclusive mode */
145#define FC_TR 0x0040 /* truncate mode */
146#define FC_NB 0x0020 /* non-blocking mode */
147#define FC_BF 0x0010 /* binary file mode */
148
149#define FC_RW (FC_RD | FC_WR) /* read-write mode */
150
151/*
152 ============================================================================
153 BIOS and XBIOS function call formats
154 ------------------------------------
155
156 In the list below, .W and .L refer to the size of the parameter
157 passed to the BIOS/XBIOS routine.
158
159 The first parameter is always the function code, "code.W".
160
161 BIOS calls are:
162 ---------------
163
164 BIOS(B_RDAV, unit.W);
165 BIOS(B_GETC, unit.W);
166 BIOS(B_PUTC, unit.W, c.W);
167 BIOS(B_RDWR, rwflag.W, buf.L, count.W, recno.W, dev.W);
168 BIOS(B_SETV, vecnum.W, vecadr.L);
169 BIOS(B_GBPB, dev.W);
170 BIOS(B_THRE, unit.W);
171 BIOS(B_MCHG, unit.W);
172 BIOS(B_DMAP);
173
174 XBIOS calls are:
175 ----------------
176
177 XBIOS(X_PIOREC, unit.W)
178 XBIOS(X_SETPRT, unit.W, mode.W, baud.W, cfr0.W, cr1.W)
179 XBIOS(X_FLOPRD, buf.L, filler.L, dev.W, sector.W, track.W,
180 side.W, count.W)
181 XBIOS(X_FLOPWR, buf.L, filler.L, dev.W, sector.W, track.W,
182 side.W, count.W)
183 XBIOS(X_FORMAT, buf.L, filler.L, dev.W, spt.W, track.W, side.W,
184 intrlv.W, magic.L, virgin.W)
185 XBIOS(X_VERIFY, buf.L, filler.L, dev.W, sector.W, track.W,
186 side.W, count.W)
187 XBIOS(X_PRBOOT, buf.L, serial.L, type.W, execflag.W)
188 XBIOS(X_RANDOM)
189 XBIOS(X_ANALOG)
190 XBIOS(X_CLRAFI)
191 ============================================================================
192*/
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