openMSX
R800.hh
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1#ifndef R800_HH
2#define R800_HH
3
4#include "CPUClock.hh"
5#include "CPURegs.hh"
6#include "Clock.hh"
7#include "inline.hh"
8#include "narrow.hh"
9#include "one_of.hh"
10#include "xrange.hh"
11#include <array>
12
13namespace openmsx {
14
15class R800TYPE : public CPUClock
16{
17public:
18 void updateVisiblePage(byte page, byte primarySlot, byte secondarySlot)
19 {
20 extraMemoryDelay[page] =
21 extraMemoryDelays[page][primarySlot][secondarySlot];
22 }
23 void setDRAMmode(bool dram)
24 {
25 // TODO currently hardcoded, move to config file?
26 unsigned val = dram ? 0 : 1;
27 extraMemoryDelays[0][0][0] = val; // BIOS
28 extraMemoryDelays[1][0][0] = val; // BASIC
29 extraMemoryDelays[0][3][1] = val; // SUB-ROM
30 extraMemoryDelays[1][3][1] = val; // KANJI-DRIVER
31 }
32
33protected:
34 template<bool B> struct Normalize { static constexpr bool value = B; };
35
36 static constexpr int CLOCK_FREQ = 7159090;
37 static constexpr unsigned HALT_STATES = 1; // TODO check this
38 static constexpr bool IS_R800 = true;
39
40 R800TYPE(EmuTime::param time, Scheduler& scheduler_)
41 : CPUClock(time, scheduler_)
42 , lastRefreshTime(time)
43 {
45
46 // TODO currently hardcoded, move to config file?
47 for (auto page : xrange(4)) {
48 for (auto prim : xrange(4)) {
49 for (auto sec : xrange(4)) {
50 extraMemoryDelays[page][prim][sec] = [&] {
51 if (prim == one_of(1, 2)) {
52 // external slot
53 return 2;
54 } else if ((prim == 3) && (sec == 0)) {
55 // internal RAM
56 return 0;
57 } else {
58 // internal ROM
59 return 1;
60 }
61 }();
62 }
63 }
64 }
65 for (auto page : xrange(4)) {
66 extraMemoryDelay[page] = extraMemoryDelays[page][0][0];
67 }
68 }
69
71 {
72 lastPage = -1;
73 }
74
75 template<bool PRE_PB, bool POST_PB>
76 ALWAYS_INLINE void PRE_MEM(unsigned address)
77 {
78 int newPage = narrow<int>(address >> 8);
79 if constexpr (PRE_PB) {
80 // there is a statically predictable page break at this
81 // point -> 'add(1)' moved to static cost table
82 } else {
83 if ((newPage != lastPage) ||
84 (extraMemoryDelay[address >> 14])) [[unlikely]] {
85 add(1);
86 }
87 }
88 if constexpr (!POST_PB) {
89 lastPage = newPage;
90 }
91 }
92 template<bool POST_PB>
93 ALWAYS_INLINE void POST_MEM(unsigned address)
94 {
95 add(extraMemoryDelay[address >> 14]);
96 if constexpr (POST_PB) {
98 }
99 }
100 template<bool PRE_PB, bool POST_PB>
101 ALWAYS_INLINE void PRE_WORD(unsigned address)
102 {
103 int newPage = narrow<int>(address >> 8);
104 if constexpr (PRE_PB) {
105 // there is a statically predictable page break at this
106 // point -> 'add(1)' moved to static cost table
107 if (extraMemoryDelay[address >> 14]) [[unlikely]] {
108 add(1);
109 }
110 } else {
111 if (extraMemoryDelay[address >> 14]) [[unlikely]] {
112 add(2);
113 } else if (newPage != lastPage) [[unlikely]] {
114 add(1);
115 }
116 }
117 if constexpr (!POST_PB) {
118 lastPage = newPage;
119 }
120 }
121 template<bool POST_PB>
122 ALWAYS_INLINE void POST_WORD(unsigned address)
123 {
124 add(2 * extraMemoryDelay[address >> 14]);
125 if constexpr (POST_PB) {
127 }
128 }
129
131 {
132 // atoc documentation says refresh every 222 clocks
133 // duration: 256/1024KB 13.5 clocks
134 // 512KB 21.5 clocks
135 // But 26/210 matches measurements much better
136 // (loosely based on old measurements by Jon on his analogue scope)
137 EmuTime time = getTimeFast();
138 if (lastRefreshTime.getTicksTill_fast(time) >= 210) [[unlikely]] {
139 R800RefreshSlow(time, R); // slow-path not inline
140 }
141 }
142 NEVER_INLINE void R800RefreshSlow(EmuTime::param time, CPURegs& R)
143 {
144 do {
145 lastRefreshTime += 210;
146 } while (lastRefreshTime.getTicksTill_fast(time) >= 210); [[unlikely]]
148 add(25);
149 R800ForcePageBreak(); // TODO check this
150 R.incR(1);
151 }
152
153 void setTime(EmuTime::param time)
154 {
155 // Base class implementation.
156 CPUClock::setTime(time);
157
158 // Otherwise advance_fast() in R800Refresh() above, gets a too
159 // large time interval.
160 lastRefreshTime.reset(time);
161 }
162
163 ALWAYS_INLINE void setMemPtr(unsigned /*x*/) { /* nothing*/ }
164 [[nodiscard]] ALWAYS_INLINE unsigned getMemPtr() const { return 0; } // dummy value
165
166 static constexpr int I = 6; // cycles for an I/O operation
167 static constexpr int O = 1; // wait for one cycle and wait for next even
168 // clock cycle (to sync with slower IO bus)
169 // the latter part must be implemented
170 // dynamically (not here in static tables)
171 static constexpr int P = 1; // cycles for a (statically known) page-break
172
173 static constexpr int
191
195 CC_CP_XIX = 3+P+1, CC_CP_XIX_1 = 1, CC_CP_XIX_2 = 3+P, // +1
197 CC_INC_XHL = 1+P+2+P+1, CC_INC_XHL_1 = 1, CC_INC_XHL_2 = 1+P+2+P,
198 CC_INC_XIX = 3+P+2+P+1, CC_INC_XIX_1 = 1, EE_INC_XIX = 2, // +1
202
203 CC_LDI = 2+P+1+P+1, CC_LDI_1 = 2+P, CC_LDI_2 = 2+P+1+P,
204 CC_LDIR = 2+P+1+P+1,
205 CC_CPI = 2+P+2, CC_CPI_1 = 2+P,
206 CC_CPIR = 2+P+3, // TODO check
207
208 CC_PUSH = 2+P+2, CC_PUSH_1 = 2+P,
209 CC_POP = 1+P+2, CC_POP_1 = 1+P,
210 CC_CALL = 3+P+2, CC_CALL_1 = 1, EE_CALL = 1,
212 CC_RST = 2+P+2, // TODO check
213 CC_RET_A = 1+P+2, CC_RET_B = 1, EE_RET_C = 0,
214 CC_RETN = 2+P+2, EE_RETN = 1, // TODO check
215 CC_JP_A = 4, CC_JP_B = 3, CC_JP_1 = 1,
217 CC_JR_A = 3, CC_JR_B = 2, CC_JR_1 = 1,
218 CC_DJNZ = 3, EE_DJNZ = 0,
219
221
224 CC_BIT_XIX = 3+P+1, CC_BIT_XIX_1 = 3+P, // +1
226 CC_SET_XHL = 2+P+2+P+1, CC_SET_XHL_1 = 2+P, CC_SET_XHL_2 = 2+P+2+P,
227 CC_SET_XIX = 3+P+2+P+1, EE_SET_XIX = 1, // +1
228
230 CC_RLD = 2+P+2+P+1, CC_RLD_1 = 2+P, CC_RLD_2 = 2+P+2+P,
231
234 CC_INI = 2+O+I+P+1, CC_INI_1 = 2+O, CC_INI_2 = 2+O+I+P,
235 CC_INIR = 2+O+I+P+1, // TODO check
238 CC_OUTI = 2+P+1+O+I, CC_OUTI_1 = 2+P, CC_OUTI_2 = 2+P+1+O,
239 CC_OTIR = 2+P+1+O+I, // TODO check
240
241 CC_EX = 1,
248 CC_DI = 2,
249 CC_EI = 1,
250 CC_HALT = 1, // TODO check
251 CC_IM = 3,
252
255
256 CC_NMI = 1+P+2, EE_NMI_1 = -1, // TODO check
257 CC_IRQ0 = 1+P+2, EE_IRQ0_1 = -1, // TODO check
258 CC_IRQ1 = 1+P+2, EE_IRQ1_1 = -1, // TODO check
259 CC_IRQ2 = 1+P+2+P+2, EE_IRQ2_1 = -1, CC_IRQ2_2 = 1+P+2+P, // TODO check
260
262 CC_DD = 1,
264 CC_DD_CB = 1, // +1
265 EE_ED = 1,
268
269 template<typename Archive>
270 void serialize(Archive& ar, unsigned version)
271 {
272 CPUClock::serialize(ar, version);
273 ar.serialize("lastRefreshTime", lastRefreshTime,
274 "lastPage", lastPage,
275 "extraMemoryDelay", extraMemoryDelay);
276
277 // don't serialize 'extraMemoryDelays', is initialized in
278 // constructor and setDRAMmode()
279 }
280
281private:
282 Clock<CLOCK_FREQ> lastRefreshTime;
283 int lastPage;
284
285 std::array<std::array<std::array<unsigned, 4>, 4>, 4> extraMemoryDelays;
286 std::array<unsigned, 4> extraMemoryDelay;
287};
288
289} // namespace openmsx
290
291#endif
Definition: one_of.hh:7
void add(unsigned ticks)
Definition: CPUClock.hh:28
void serialize(Archive &ar, unsigned version)
Definition: CPUClock.cc:20
EmuTime getTimeFast() const
Definition: CPUClock.hh:37
void setTime(EmuTime::param time)
Definition: CPUClock.hh:41
void waitForEvenCycle(int cc)
R800 runs at 7MHz, but I/O is done over a slower 3.5MHz bus.
Definition: CPUClock.hh:65
void incR(byte x)
Definition: CPURegs.hh:114
constexpr void reset(EmuTime::param e)
Reset the clock to start ticking at the given time.
Definition: Clock.hh:102
constexpr unsigned getTicksTill_fast(EmuTime::param e) const
Same as above, only faster, Though the time interval may not be too large.
Definition: Clock.hh:70
static constexpr int CC_MULUB
Definition: R800.hh:253
static constexpr int CC_CPI
Definition: R800.hh:205
static constexpr int CC_LD_R_R
Definition: R800.hh:177
static constexpr int CC_NEG
Definition: R800.hh:246
static constexpr int CC_LD_HL_N_2
Definition: R800.hh:182
ALWAYS_INLINE void PRE_MEM(unsigned address)
Definition: R800.hh:76
static constexpr int CC_RETN
Definition: R800.hh:214
static constexpr int CC_CALL
Definition: R800.hh:210
static constexpr int CC_LD_HL_XX_2
Definition: R800.hh:187
static constexpr int CC_LD_XX_HL_1
Definition: R800.hh:190
static constexpr int CC_IM
Definition: R800.hh:251
static constexpr int CC_LD_R_HL_1
Definition: R800.hh:179
static constexpr int CC_JR_1
Definition: R800.hh:217
static constexpr int CC_LDI_2
Definition: R800.hh:203
static constexpr int CC_CPI_1
Definition: R800.hh:205
static constexpr int CC_LD_NN_A
Definition: R800.hh:184
static constexpr int CC_LD_HL_N_1
Definition: R800.hh:182
static constexpr int CC_PUSH_1
Definition: R800.hh:208
static constexpr int CC_BIT_XIX
Definition: R800.hh:224
static constexpr int CC_INC_XIX_1
Definition: R800.hh:198
static constexpr int CC_JP_A
Definition: R800.hh:215
void serialize(Archive &ar, unsigned version)
Definition: R800.hh:270
static constexpr int CC_BIT_XHL
Definition: R800.hh:223
static constexpr int CC_LD_NN_A_2
Definition: R800.hh:184
static constexpr int CC_LD_HL_XX_1
Definition: R800.hh:187
static constexpr int CC_BIT_XHL_1
Definition: R800.hh:223
static constexpr int CC_LD_XIX_N
Definition: R800.hh:186
static constexpr int CC_WRMEM
Definition: R800.hh:267
static constexpr int CC_NOP
Definition: R800.hh:242
static constexpr int CC_RST
Definition: R800.hh:212
static constexpr int CC_JR_B
Definition: R800.hh:217
ALWAYS_INLINE void PRE_WORD(unsigned address)
Definition: R800.hh:101
static constexpr int CC_LD_SS_NN
Definition: R800.hh:189
static constexpr int CC_LD_NN_A_1
Definition: R800.hh:184
static constexpr int CC_CP_XHL_1
Definition: R800.hh:194
static constexpr int EE_ED
Definition: R800.hh:265
static constexpr int CC_JP_HL
Definition: R800.hh:216
static constexpr int CC_CALL_A
Definition: R800.hh:211
static constexpr int CC_LD_SP_HL
Definition: R800.hh:188
static constexpr int CC_DI
Definition: R800.hh:248
ALWAYS_INLINE unsigned getMemPtr() const
Definition: R800.hh:164
static constexpr int CC_LD_A_NN_1
Definition: R800.hh:175
static constexpr int CC_INC_XIX
Definition: R800.hh:198
static constexpr int EE_IRQ1_1
Definition: R800.hh:258
static constexpr int CC_RLD
Definition: R800.hh:230
static constexpr int CC_LD_XIX_N_1
Definition: R800.hh:186
static constexpr int CC_NMI
Definition: R800.hh:256
static constexpr int CLOCK_FREQ
Definition: R800.hh:36
static constexpr bool IS_R800
Definition: R800.hh:38
ALWAYS_INLINE void setMemPtr(unsigned)
Definition: R800.hh:163
static constexpr int CC_CP_XIX_1
Definition: R800.hh:195
static constexpr int CC_INC_SS
Definition: R800.hh:199
void setTime(EmuTime::param time)
Definition: R800.hh:153
static constexpr int CC_LD_A_SS_1
Definition: R800.hh:174
static constexpr int CC_RET_A
Definition: R800.hh:213
static constexpr int CC_IRQ1
Definition: R800.hh:258
static constexpr int CC_LD_HL_XX
Definition: R800.hh:187
static constexpr int EE_RET_C
Definition: R800.hh:213
ALWAYS_INLINE void R800ForcePageBreak()
Definition: R800.hh:70
static constexpr int CC_LD_SS_NN_1
Definition: R800.hh:189
static constexpr int CC_CALL_B
Definition: R800.hh:211
static constexpr int CC_LD_XIX_N_2
Definition: R800.hh:186
static constexpr int CC_RDMEM
Definition: R800.hh:266
static constexpr int CC_SET_XHL_1
Definition: R800.hh:226
static constexpr int CC_ADD_HL_SS
Definition: R800.hh:200
static constexpr int CC_BIT_R
Definition: R800.hh:222
static constexpr int CC_CP_XHL
Definition: R800.hh:194
static constexpr int CC_MULUW
Definition: R800.hh:254
static constexpr int CC_DAA
Definition: R800.hh:245
static constexpr int CC_MAIN
Definition: R800.hh:261
static constexpr int CC_LD_R_N
Definition: R800.hh:178
static constexpr int CC_BIT_XIX_1
Definition: R800.hh:224
static constexpr int P
Definition: R800.hh:171
static constexpr int CC_EI
Definition: R800.hh:249
static constexpr int CC_JP_B
Definition: R800.hh:215
static constexpr int CC_CCF
Definition: R800.hh:243
static constexpr int CC_LD_HL_N
Definition: R800.hh:182
static constexpr int CC_INC_XHL
Definition: R800.hh:197
static constexpr int CC_EX_SP_HL
Definition: R800.hh:220
static constexpr int CC_OUT_C_R
Definition: R800.hh:237
static constexpr int CC_EX
Definition: R800.hh:241
static constexpr int CC_PUSH
Definition: R800.hh:208
void updateVisiblePage(byte page, byte primarySlot, byte secondarySlot)
Definition: R800.hh:18
ALWAYS_INLINE void R800Refresh(CPURegs &R)
Definition: R800.hh:130
static constexpr int CC_RET_B
Definition: R800.hh:213
static constexpr int CC_SET_XHL
Definition: R800.hh:226
ALWAYS_INLINE void POST_WORD(unsigned address)
Definition: R800.hh:122
R800TYPE(EmuTime::param time, Scheduler &scheduler_)
Definition: R800.hh:40
static constexpr int CC_LD_HL_R
Definition: R800.hh:181
static constexpr int CC_LD_A_NN
Definition: R800.hh:175
static constexpr int CC_LD_R_XIX_1
Definition: R800.hh:180
static constexpr int CC_HALT
Definition: R800.hh:250
static constexpr int CC_EX_SP_HL_1
Definition: R800.hh:220
static constexpr int CC_SCF
Definition: R800.hh:244
static constexpr int CC_LD_XIX_R_2
Definition: R800.hh:185
static constexpr int CC_CP_N_1
Definition: R800.hh:193
static constexpr int CC_LD_R_HL
Definition: R800.hh:179
static constexpr int CC_LD_A_NN_2
Definition: R800.hh:175
static constexpr int CC_LD_SS_A
Definition: R800.hh:183
static constexpr int CC_EX_SP_HL_2
Definition: R800.hh:220
ALWAYS_INLINE void POST_MEM(unsigned address)
Definition: R800.hh:93
static constexpr int CC_CP_R
Definition: R800.hh:192
static constexpr int O
Definition: R800.hh:167
static constexpr int CC_LD_HL_R_1
Definition: R800.hh:181
static constexpr int CC_LD_XX_HL_2
Definition: R800.hh:190
static constexpr int CC_INI
Definition: R800.hh:234
static constexpr int CC_OUT_N_A_2
Definition: R800.hh:236
static constexpr unsigned HALT_STATES
Definition: R800.hh:37
static constexpr int EE_CALL
Definition: R800.hh:210
static constexpr int CC_LD_XIX_R
Definition: R800.hh:185
NEVER_INLINE void R800RefreshSlow(EmuTime::param time, CPURegs &R)
Definition: R800.hh:142
static constexpr int CC_CALL_1
Definition: R800.hh:210
static constexpr int CC_IRQ2
Definition: R800.hh:259
void setDRAMmode(bool dram)
Definition: R800.hh:23
static constexpr int CC_DJNZ
Definition: R800.hh:218
static constexpr int CC_OUT_C_R_1
Definition: R800.hh:237
static constexpr int CC_OTIR
Definition: R800.hh:239
static constexpr int CC_RLD_1
Definition: R800.hh:230
static constexpr int CC_LD_SS_A_1
Definition: R800.hh:183
static constexpr int CC_POP_1
Definition: R800.hh:209
static constexpr int EE_RETN
Definition: R800.hh:214
static constexpr int CC_LD_XX_HL
Definition: R800.hh:190
static constexpr int CC_SET_XIX
Definition: R800.hh:227
static constexpr int CC_IN_R_C
Definition: R800.hh:233
static constexpr int CC_IRQ0
Definition: R800.hh:257
static constexpr int CC_INC_R
Definition: R800.hh:196
static constexpr int CC_LDI
Definition: R800.hh:203
static constexpr int CC_LD_XIX_R_1
Definition: R800.hh:185
static constexpr int CC_CP_XIX
Definition: R800.hh:195
static constexpr int CC_DD
Definition: R800.hh:262
static constexpr int CC_OUT_N_A_1
Definition: R800.hh:236
static constexpr int CC_OUTI_1
Definition: R800.hh:238
static constexpr int CC_IN_A_N_1
Definition: R800.hh:232
static constexpr int CC_INC_XHL_1
Definition: R800.hh:197
static constexpr int CC_LDIR
Definition: R800.hh:204
static constexpr int CC_RLD_2
Definition: R800.hh:230
static constexpr int CC_IN_A_N
Definition: R800.hh:232
static constexpr int EE_NMI_1
Definition: R800.hh:256
static constexpr int CC_CPIR
Definition: R800.hh:206
static constexpr int CC_JR_A
Definition: R800.hh:217
static constexpr int CC_LD_R_XIX_2
Definition: R800.hh:180
static constexpr int EE_IRQ0_1
Definition: R800.hh:257
static constexpr int CC_LD_A_SS
Definition: R800.hh:174
static constexpr int CC_CPL
Definition: R800.hh:247
static constexpr int CC_IN_R_C_1
Definition: R800.hh:233
static constexpr int I
Definition: R800.hh:166
static constexpr int CC_SET_XHL_2
Definition: R800.hh:226
static constexpr int CC_INIR
Definition: R800.hh:235
static constexpr int CC_SET_R
Definition: R800.hh:225
static constexpr int CC_CP_XIX_2
Definition: R800.hh:195
static constexpr int EE_INC_XIX
Definition: R800.hh:198
static constexpr int CC_JP_1
Definition: R800.hh:215
static constexpr int EE_IRQ2_1
Definition: R800.hh:259
static constexpr int CC_OUTI
Definition: R800.hh:238
static constexpr int CC_LD_R_N_1
Definition: R800.hh:178
static constexpr int EE_DJNZ
Definition: R800.hh:218
static constexpr int CC_ADC_HL_SS
Definition: R800.hh:201
static constexpr int CC_LD_A_I
Definition: R800.hh:176
static constexpr int CC_OUTI_2
Definition: R800.hh:238
static constexpr int CC_CP_N
Definition: R800.hh:193
static constexpr int CC_LD_R_XIX
Definition: R800.hh:180
static constexpr int CC_DD_CB
Definition: R800.hh:264
static constexpr int CC_PREFIX
Definition: R800.hh:263
static constexpr int CC_POP
Definition: R800.hh:209
static constexpr int CC_INI_2
Definition: R800.hh:234
static constexpr int EE_SET_XIX
Definition: R800.hh:227
static constexpr int CC_IRQ2_2
Definition: R800.hh:259
static constexpr int CC_RLA
Definition: R800.hh:229
static constexpr int CC_INC_XHL_2
Definition: R800.hh:197
static constexpr int CC_OUT_N_A
Definition: R800.hh:236
static constexpr int CC_LDI_1
Definition: R800.hh:203
static constexpr int CC_INI_1
Definition: R800.hh:234
static constexpr int CC_IN_A_N_2
Definition: R800.hh:232
#define NEVER_INLINE
Definition: inline.hh:17
#define ALWAYS_INLINE
Definition: inline.hh:16
This file implemented 3 utility functions:
Definition: Autofire.cc:9
static constexpr bool value
Definition: R800.hh:34
constexpr auto xrange(T e)
Definition: xrange.hh:133