1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: bt431.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 8/91
*
* Routines for the bt431 Cursor
*/
#include <platforms.h>
#include <chips/bt431.h>
#include <chips/screen.h>
#ifdef DECSTATION
/*
* This configuration uses two twin 431s
*/
#define set_value(x) (((x)<<8)|((x)&0xff))
#define get_value(x) ((x)&0xff)
typedef struct {
volatile unsigned short addr_lo;
short pad0;
volatile unsigned short addr_hi;
short pad1;
volatile unsigned short addr_cmap;
short pad2;
volatile unsigned short addr_reg;
short pad3;
} bt431_padded_regmap_t;
#else /*DECSTATION*/
#define set_value(x) x
#define get_value(x) x
typedef bt431_regmap_t bt431_padded_regmap_t;
#define wbflush()
#endif /*DECSTATION*/
/*
* Generic register access
*/
void
bt431_select_reg( regs, regno)
bt431_padded_regmap_t *regs;
{
regs->addr_lo = set_value(regno&0xff);
regs->addr_hi = set_value((regno >> 8) & 0xff);
wbflush();
}
void
bt431_write_reg( regs, regno, val)
bt431_padded_regmap_t *regs;
{
bt431_select_reg( regs, regno );
regs->addr_reg = set_value(val);
wbflush();
}
unsigned char
bt431_read_reg( regs, regno)
bt431_padded_regmap_t *regs;
{
bt431_select_reg( regs, regno );
return get_value(regs->addr_reg);
}
/* when using autoincrement */
#define bt431_write_reg_autoi( regs, regno, val) \
{ \
(regs)->addr_reg = set_value(val); \
wbflush(); \
}
#define bt431_read_reg_autoi( regs, regno) \
get_value(((regs)->addr_reg))
#define bt431_write_cmap_autoi( regs, regno, val) \
{ \
(regs)->addr_cmap = (val); \
wbflush(); \
}
#define bt431_read_cmap_autoi( regs, regno) \
((regs)->addr_cmap)
/*
* Cursor ops
*/
bt431_cursor_on(regs)
bt431_padded_regmap_t *regs;
{
bt431_write_reg( regs, BT431_REG_CMD,
BT431_CMD_CURS_ENABLE|BT431_CMD_OR_CURSORS|
BT431_CMD_4_1_MUX|BT431_CMD_THICK_1);
}
bt431_cursor_off(regs)
bt431_padded_regmap_t *regs;
{
bt431_write_reg( regs, BT431_REG_CMD, BT431_CMD_4_1_MUX);
}
bt431_pos_cursor(regs,x,y)
bt431_padded_regmap_t *regs;
register int x,y;
{
#define lo(v) ((v)&0xff)
#define hi(v) (((v)&0xf00)>>8)
/*
* Cx = x + D + H - P
* P = 37 if 1:1, 52 if 4:1, 57 if 5:1
* D = pixel skew between outdata and external data
* H = pixels between HSYNCH falling and active video
*
* Cy = y + V - 32
* V = scanlines between HSYNCH falling, two or more
* clocks after VSYNCH falling, and active video
*/
bt431_write_reg( regs, BT431_REG_CXLO, lo(x + 360));
/* use autoincr feature */
bt431_write_reg_autoi( regs, BT431_REG_CXHI, hi(x + 360));
bt431_write_reg_autoi( regs, BT431_REG_CYLO, lo(y + 36));
bt431_write_reg_autoi( regs, BT431_REG_CYHI, hi(y + 36));
}
bt431_cursor_sprite( regs, cursor)
bt431_padded_regmap_t *regs;
register unsigned short *cursor;
{
register int i;
bt431_select_reg( regs, BT431_REG_CRAM_BASE+0);
for (i = 0; i < 512; i++)
bt431_write_cmap_autoi( regs, BT431_REG_CRAM_BASE+i, *cursor++);
}
#if 1
bt431_print_cursor(regs)
bt431_padded_regmap_t *regs;
{
unsigned short curs[512];
register int i;
bt431_select_reg( regs, BT431_REG_CRAM_BASE+0);
for (i = 0; i < 512; i++) {
curs[i] = bt431_read_cmap_autoi( regs, BT431_REG_CRAM_BASE+i);
}
for (i = 0; i < 512; i += 16)
printf("%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x\n",
curs[i], curs[i+1], curs[i+2], curs[i+3],
curs[i+4], curs[i+5], curs[i+6], curs[i+7],
curs[i+8], curs[i+9], curs[i+10], curs[i+11],
curs[i+12], curs[i+13], curs[i+14], curs[i+15]);
}
#endif
/*
* Initialization
*/
unsigned /*char*/short bt431_default_cursor[64*8] = {
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0xffff, 0, 0, 0, 0, 0, 0, 0,
0,
};
bt431_init(regs)
bt431_padded_regmap_t *regs;
{
register int i;
/* use 4:1 input mux */
bt431_write_reg( regs, BT431_REG_CMD,
BT431_CMD_CURS_ENABLE|BT431_CMD_OR_CURSORS|
BT431_CMD_4_1_MUX|BT431_CMD_THICK_1);
/* home cursor */
bt431_write_reg_autoi( regs, BT431_REG_CXLO, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_CXHI, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_CYLO, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_CYHI, 0x00);
/* no crosshair window */
bt431_write_reg_autoi( regs, BT431_REG_WXLO, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WXHI, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WYLO, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WYHI, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WWLO, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WWHI, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WHLO, 0x00);
bt431_write_reg_autoi( regs, BT431_REG_WHHI, 0x00);
/* load default cursor */
bt431_cursor_sprite( regs, bt431_default_cursor);
}
|
