1 /*
2 * KCemu -- The emulator for the KC85 homecomputer series and much more.
3 * Copyright (C) 1997-2010 Torsten Paul
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include <iostream>
21 #include <iomanip>
22
23 #include "kc/system.h"
24
25 #include "kc/kc.h"
26 #include "kc/pio4.h"
27 #include "kc/tape.h"
28 #include "kc/memory4.h"
29
30 #include "libdbg/dbg.h"
31
32 #define memory ((Memory4 *)memory)
33
PIO4(void)34 PIO4::PIO4(void)
35 {
36 }
37
~PIO4(void)38 PIO4::~PIO4(void)
39 {
40 }
41
42 byte_t
in(word_t addr)43 PIO4::in(word_t addr)
44 {
45 DBG(2, form("KCemu/PIO/4/in",
46 "PIO4::in(): addr = %04x\n",
47 addr));
48
49 switch (addr & 3)
50 {
51 case 0:
52 return in_A_DATA();
53 case 1:
54 return in_B_DATA();
55 case 2:
56 return in_A_CTRL();
57 case 3:
58 return in_B_CTRL();
59 }
60
61 return 0; // shouldn't be reached
62 }
63
64 void
out(word_t addr,byte_t val)65 PIO4::out(word_t addr, byte_t val)
66 {
67 DBG(2, form("KCemu/PIO/4/out",
68 "PIO4::out(): addr = %04x, val = %02x\n",
69 addr, val));
70
71 switch (addr & 3)
72 {
73 case 0:
74 out_A_DATA(val);
75 break;
76 case 1:
77 out_B_DATA(val);
78 break;
79 case 2:
80 out_A_CTRL(val);
81 break;
82 case 3:
83 out_B_CTRL(val);
84 break;
85 }
86 }
87
88 void
change_A(byte_t changed,byte_t val)89 PIO4::change_A(byte_t changed, byte_t val)
90 {
91 if (changed & 0x01)
92 {
93 DBG(2, form("KCemu/PIO/4/change/A",
94 "PIO A: CAOS ROM E [%d]\n",
95 (val & 1)));
96 memory->enableCAOS_E(val & 0x01);
97 }
98 if (changed & 0x02)
99 {
100 DBG(2, form("KCemu/PIO/4/change/A",
101 "PIO A: RAM 0 [%d]\n",
102 ((val >> 1) & 1)));
103 memory->enableRAM_0(val & 0x02);
104 }
105 if (changed & 0x04)
106 {
107 DBG(2, form("KCemu/PIO/4/change/A",
108 "PIO A: IRM [%d]\n",
109 ((val >> 2) & 1)));
110 memory->enableIRM(val & 0x04);
111 }
112 if (changed & 0x08)
113 {
114 DBG(2, form("KCemu/PIO/4/change/A",
115 "PIO A: write protect RAM 0 [%d]\n",
116 ((val >> 3) & 1)));
117 memory->protectRAM_0(val & 0x08);
118 }
119 if (changed & 0x10)
120 {
121 DBG(2, form("KCemu/PIO/4/change/A",
122 "PIO A: K OUT (unused) [%d]\n",
123 ((val >> 4) & 1)));
124 }
125 if (changed & 0x20)
126 {
127 DBG(2, form("KCemu/PIO/4/change/A",
128 "PIO A: LED [%d]\n",
129 ((val >> 5) & 1)));
130 }
131 if (changed & 0x40)
132 {
133 DBG(2, form("KCemu/PIO/4/change/A",
134 "PIO A: TAPE Power [%d]\n",
135 ((val >> 6) & 1)));
136 tape->power((val >> 6) & 1);
137 }
138 if (changed & 0x80)
139 {
140 DBG(2, form("KCemu/PIO/4/change/A",
141 "PIO A: ROM C (BASIC) [%d]\n",
142 ((val >> 7) & 1)));
143 memory->enableBASIC_C(val & 0x80);
144 }
145 }
146
147 void
change_B(byte_t changed,byte_t val)148 PIO4::change_B(byte_t changed, byte_t val)
149 {
150 if (changed & 0x01)
151 DBG(2, form("KCemu/PIO/4/change/B",
152 "PIO B: flip-flop [%d]\n",
153 (val & 1)));
154 if (changed & 0x0e)
155 DBG(2, form("KCemu/PIO/4/change/B",
156 "PIO B: volume [%d]\n",
157 ((val >> 1) & 7)));
158 if (changed & 0x10)
159 DBG(2, form("KCemu/PIO/4/change/B",
160 "PIO B: unused 0x10 [%d]\n",
161 ((val >> 4) & 1)));
162 if (changed & 0x20)
163 {
164 DBG(2, form("KCemu/PIO/4/change/B",
165 "PIO B: RAM 8 [%d]\n",
166 ((val >> 5) & 1)));
167 memory->enableRAM_8(val & 0x20);
168 }
169 if (changed & 0x40)
170 {
171 DBG(2, form("KCemu/PIO/4/change/B",
172 "PIO B: RAM 8 write protect [%d]\n",
173 ((val >> 6) & 1)));
174 memory->protectRAM_8(val & 0x40);
175 }
176 if (changed & 0x80)
177 DBG(2, form("KCemu/PIO/4/change/B",
178 "PIO B: foreground blink [%d]\n",
179 ((val >> 6) & 1)));
180 }
181
182 void
tape_callback(byte_t val)183 PIO4::tape_callback(byte_t val)
184 {
185 strobe_A();
186 }
187