source: buchla-68k/include/biosdefs.h@ f40a309

Last change on this file since f40a309 was f40a309, 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
8extern long trap13(); /* BIOS linkage */
9extern long trap14(); /* XBIOS linkage */
10
11#define BIOS trap13
12#define XBIOS trap14
13
14/* BIOS functions */
15
16/* function 0 unused (getmpb) */
17
18#define B_RDAV 1
19#define B_GETC 2
20#define B_PUTC 3
21#define B_RDWR 4
22#define B_SETV 5
23
24/* function 6 unused (tickcal) */
25
26#define B_GBPB 7
27#define B_THRE 8
28#define B_MCHG 9
29#define B_DMAP 10
30
31/* function 11 unused (shift) */
32
33/* XBIOS functions */
34
35#define X_PIOREC 0
36#define X_SETPRT 1
37#define X_FLOPRD 2
38#define X_FLOPWR 3
39#define X_FORMAT 4
40#define X_VERIFY 5
41#define X_PRBOOT 6
42#define X_RANDOM 7
43#define X_ANALOG 8
44#define X_CLRAFI 9
45#define X_APICHK 10
46#define X_MTDEFS 11
47
48/* device unit numbers */
49
50#define PRT_DEV 0
51#define AUX_DEV 1
52#define CON_DEV 2
53#define MC1_DEV 3
54#define MC2_DEV 4
55
56/*
57 */
58/*
59 ============================================================================
60 bpb -- BIOS parameter block
61 ============================================================================
62*/
63
64
65struct bpb { /* BIOS parameter block returned by B_GBPB */
66
67 unsigned short recsiz; /* physical sector size in bytes */
68 unsigned short clsiz; /* cluster size in sectors */
69 unsigned short clsizb; /* cluster size in bytes */
70 unsigned short rdlen; /* root directory length in sectors */
71 unsigned short fsiz; /* FAT size in sectors */
72 unsigned short fatrec; /* sector number of 1st sector of 2nd FAT */
73 unsigned short datrec; /* sector number of 1st data sector */
74 unsigned short numcl; /* number of data clusters on disk */
75 unsigned short bflags; /* flags */
76 unsigned short ntracks; /* number of tracks */
77 unsigned short nsides; /* number of sides (heads) */
78 unsigned short dspc; /* sectors per cylinder */
79 unsigned short dspt; /* sectors per track */
80 unsigned short hidden; /* number of hidden files */
81 char serno[3]; /* disk serial number */
82 char nada; /* --- filler - nothing here --- */
83};
84
85#define BPBSIZE 32 /* length of a BPB */
86
87#define B_FAT16 0x0001 /* flag for using 16 bit FAT entries */
88
89/*
90
91*/
92
93/*
94 ============================================================================
95 dirent -- Directory entry
96 ============================================================================
97*/
98
99struct dirent { /* Directory entry */
100
101 char fname[8]; /* file name */
102 char fext[3]; /* file extension */
103 char atrib; /* attribute byte */
104 char unused[10]; /* unused space */
105 unsigned short crtime; /* 'LLHH' creation time */
106 unsigned short crdate; /* 'LLHH' creation date */
107 unsigned short bclust; /* 'LLHH' starting cluster number */
108 long flen; /* 'LLHH' file length */
109};
110
111#define DENTSIZE (sizeof (struct dirent))
112
113#define F_RDONLY 0x01 /* Read only file */
114#define F_HIDDEN 0x02 /* Hidden file */
115#define F_SYSTEM 0x04 /* System file */
116#define F_VOLUME 0x08 /* Volume label */
117#define F_SUBDIR 0x10 /* Sub-directory */
118#define F_ARCHIV 0x20 /* Archived */
119
120/*
121
122*/
123
124/*
125 ============================================================================
126 fcb -- File Control Block
127 ============================================================================
128*/
129
130struct fcb { /* file control block */
131
132 struct dirent de; /* directory entry image for file */
133 unsigned short modefl; /* fcb flags */
134 unsigned short clsec; /* current sector in cluster */
135 unsigned short curcls; /* current cluster */
136 unsigned short offset; /* current offset into sector */
137 long curlsn; /* current logical sector number in file */
138 long curdsn; /* current logical sector number on disk */
139 long curlen; /* current file length in bytes */
140 long asects; /* allocated file length in sectors */
141};
142
143#define FC_EOF 0x8000 /* end of file */
144#define FC_BAD 0x4000 /* bad FAT entry encountered */
145#define FC_ERR 0x2000 /* error encountered */
146#define FC_OPN 0x1000 /* file open */
147
148#define FC_CR 0x0800 /* create mode */
149#define FC_AP 0x0400 /* append mode */
150#define FC_WR 0x0200 /* write mode */
151#define FC_RD 0x0100 /* read mode */
152
153#define FC_EX 0x0080 /* exclusive mode */
154#define FC_TR 0x0040 /* truncate mode */
155#define FC_NB 0x0020 /* non-blocking mode */
156#define FC_BF 0x0010 /* binary file mode */
157
158#define FC_RW (FC_RD | FC_WR) /* read-write mode */
159
160/*
161 */
162
163/*
164 ============================================================================
165 BIOS and XBIOS function call formats
166 ------------------------------------
167
168 In the list below, .W and .L refer to the size of the parameter
169 passed to the BIOS/XBIOS routine.
170
171 The first parameter is always the function code, "code.W".
172
173 BIOS calls are:
174 ---------------
175
176 BIOS(B_RDAV, unit.W);
177 BIOS(B_GETC, unit.W);
178 BIOS(B_PUTC, unit.W, c.W);
179 BIOS(B_RDWR, rwflag.W, buf.L, count.W, recno.W, dev.W);
180 BIOS(B_SETV, vecnum.W, vecadr.L);
181 BIOS(B_GBPB, dev.W);
182 BIOS(B_THRE, unit.W);
183 BIOS(B_MCHG, unit.W);
184 BIOS(B_DMAP);
185
186 XBIOS calls are:
187 ----------------
188
189 XBIOS(X_PIOREC, unit.W)
190 XBIOS(X_SETPRT, unit.W, mode.W, baud.W, cfr0.W, cr1.W)
191 XBIOS(X_FLOPRD, buf.L, filler.L, dev.W, sector.W, track.W,
192 side.W, count.W)
193 XBIOS(X_FLOPWR, buf.L, filler.L, dev.W, sector.W, track.W,
194 side.W, count.W)
195 XBIOS(X_FORMAT, buf.L, filler.L, dev.W, spt.W, track.W, side.W,
196 intrlv.W, magic.L, virgin.W)
197 XBIOS(X_VERIFY, buf.L, filler.L, dev.W, sector.W, track.W,
198 side.W, count.W)
199 XBIOS(X_PRBOOT, buf.L, serial.L, type.W, execflag.W)
200 XBIOS(X_RANDOM)
201 XBIOS(X_ANALOG)
202 XBIOS(X_CLRAFI)
203 ============================================================================
204*/
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