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 "one_of.hh"
9#include "xrange.hh"
10
11namespace openmsx {
12
13class R800TYPE : public CPUClock
14{
15public:
16 void updateVisiblePage(byte page, byte primarySlot, byte secondarySlot)
17 {
18 extraMemoryDelay[page] =
19 extraMemoryDelays[page][primarySlot][secondarySlot];
20 }
21 void setDRAMmode(bool dram)
22 {
23 // TODO currently hardcoded, move to config file?
24 unsigned val = dram ? 0 : 1;
25 extraMemoryDelays[0][0][0] = val; // BIOS
26 extraMemoryDelays[1][0][0] = val; // BASIC
27 extraMemoryDelays[0][3][1] = val; // SUB-ROM
28 extraMemoryDelays[1][3][1] = val; // KANJI-DRIVER
29 }
30
31protected:
32 template<bool B> struct Normalize { static constexpr bool value = B; };
33
34 static constexpr int CLOCK_FREQ = 7159090;
35 static constexpr unsigned HALT_STATES = 1; // TODO check this
36 static constexpr bool IS_R800 = true;
37
38 R800TYPE(EmuTime::param time, Scheduler& scheduler_)
39 : CPUClock(time, scheduler_)
40 , lastRefreshTime(time)
41 {
43
44 // TODO currently hardcoded, move to config file?
45 for (auto page : xrange(4)) {
46 for (auto prim : xrange(4)) {
47 for (auto sec : xrange(4)) {
48 extraMemoryDelays[page][prim][sec] = [&] {
49 if (prim == one_of(1, 2)) {
50 // external slot
51 return 2;
52 } else if ((prim == 3) && (sec == 0)) {
53 // internal RAM
54 return 0;
55 } else {
56 // internal ROM
57 return 1;
58 }
59 }();
60 }
61 }
62 }
63 for (auto page : xrange(4)) {
64 extraMemoryDelay[page] = extraMemoryDelays[page][0][0];
65 }
66 }
67
69 {
70 lastPage = -1;
71 }
72
73 template<bool PRE_PB, bool POST_PB>
74 ALWAYS_INLINE void PRE_MEM(unsigned address)
75 {
76 int newPage = address >> 8;
77 if constexpr (PRE_PB) {
78 // there is a statically predictable page break at this
79 // point -> 'add(1)' moved to static cost table
80 } else {
81 if ((newPage != lastPage) ||
82 (extraMemoryDelay[address >> 14])) [[unlikely]] {
83 add(1);
84 }
85 }
86 if constexpr (!POST_PB) {
87 lastPage = newPage;
88 }
89 }
90 template<bool POST_PB>
91 ALWAYS_INLINE void POST_MEM(unsigned address)
92 {
93 add(extraMemoryDelay[address >> 14]);
94 if constexpr (POST_PB) {
96 }
97 }
98 template<bool PRE_PB, bool POST_PB>
99 ALWAYS_INLINE void PRE_WORD(unsigned address)
100 {
101 int newPage = address >> 8;
102 if constexpr (PRE_PB) {
103 // there is a statically predictable page break at this
104 // point -> 'add(1)' moved to static cost table
105 if (extraMemoryDelay[address >> 14]) [[unlikely]] {
106 add(1);
107 }
108 } else {
109 if (extraMemoryDelay[address >> 14]) [[unlikely]] {
110 add(2);
111 } else if (newPage != lastPage) [[unlikely]] {
112 add(1);
113 }
114 }
115 if constexpr (!POST_PB) {
116 lastPage = newPage;
117 }
118 }
119 template<bool POST_PB>
120 ALWAYS_INLINE void POST_WORD(unsigned address)
121 {
122 add(2 * extraMemoryDelay[address >> 14]);
123 if constexpr (POST_PB) {
125 }
126 }
127
129 {
130 // atoc documentation says refresh every 222 clocks
131 // duration: 256/1024KB 13.5 clocks
132 // 512KB 21.5 clocks
133 // But 26/210 matches measurements much better
134 // (loosly based on old measurements by Jon on his analogue scope)
135 EmuTime time = getTimeFast();
136 if (lastRefreshTime.getTicksTill_fast(time) >= 210) [[unlikely]] {
137 R800RefreshSlow(time, R); // slow-path not inline
138 }
139 }
140 NEVER_INLINE void R800RefreshSlow(EmuTime::param time, CPURegs& R)
141 {
142 do {
143 lastRefreshTime += 210;
144 } while (lastRefreshTime.getTicksTill_fast(time) >= 210); [[unlikely]]
146 add(25);
147 R800ForcePageBreak(); // TODO check this
148 R.incR(1);
149 }
150
151 void setTime(EmuTime::param time)
152 {
153 // Base class implementation.
154 CPUClock::setTime(time);
155
156 // Otherwise advance_fast() in R800Refresh() above, gets a too
157 // large time interval.
158 lastRefreshTime.reset(time);
159 }
160
161 ALWAYS_INLINE void setMemPtr(unsigned /*x*/) { /* nothing*/ }
162 [[nodiscard]] ALWAYS_INLINE unsigned getMemPtr() const { return 0; } // dummy value
163
164 static constexpr int I = 6; // cycles for an I/O operation
165 static constexpr int O = 1; // wait for one cycle and wait for next even
166 // clock cycle (to sync with slower IO bus)
167 // the latter part must be implemented
168 // dynamically (not here in static tables)
169 static constexpr int P = 1; // cycles for a (statically known) page-break
170
171 static constexpr int
189
193 CC_CP_XIX = 3+P+1, CC_CP_XIX_1 = 1, CC_CP_XIX_2 = 3+P, // +1
195 CC_INC_XHL = 1+P+2+P+1, CC_INC_XHL_1 = 1, CC_INC_XHL_2 = 1+P+2+P,
196 CC_INC_XIX = 3+P+2+P+1, CC_INC_XIX_1 = 1, EE_INC_XIX = 2, // +1
200
201 CC_LDI = 2+P+1+P+1, CC_LDI_1 = 2+P, CC_LDI_2 = 2+P+1+P,
202 CC_LDIR = 2+P+1+P+1,
203 CC_CPI = 2+P+2, CC_CPI_1 = 2+P,
204 CC_CPIR = 2+P+3, // TODO check
205
206 CC_PUSH = 2+P+2, CC_PUSH_1 = 2+P,
207 CC_POP = 1+P+2, CC_POP_1 = 1+P,
208 CC_CALL = 3+P+2, CC_CALL_1 = 1, EE_CALL = 1,
210 CC_RST = 2+P+2, // TODO check
211 CC_RET_A = 1+P+2, CC_RET_B = 1, EE_RET_C = 0,
212 CC_RETN = 2+P+2, EE_RETN = 1, // TODO check
213 CC_JP_A = 4, CC_JP_B = 3, CC_JP_1 = 1,
215 CC_JR_A = 3, CC_JR_B = 2, CC_JR_1 = 1,
216 CC_DJNZ = 3, EE_DJNZ = 0,
217
219
222 CC_BIT_XIX = 3+P+1, CC_BIT_XIX_1 = 3+P, // +1
224 CC_SET_XHL = 2+P+2+P+1, CC_SET_XHL_1 = 2+P, CC_SET_XHL_2 = 2+P+2+P,
225 CC_SET_XIX = 3+P+2+P+1, EE_SET_XIX = 1, // +1
226
228 CC_RLD = 2+P+2+P+1, CC_RLD_1 = 2+P, CC_RLD_2 = 2+P+2+P,
229
232 CC_INI = 2+O+I+P+1, CC_INI_1 = 2+O, CC_INI_2 = 2+O+I+P,
233 CC_INIR = 2+O+I+P+1, // TODO check
236 CC_OUTI = 2+P+1+O+I, CC_OUTI_1 = 2+P, CC_OUTI_2 = 2+P+1+O,
237 CC_OTIR = 2+P+1+O+I, // TODO check
238
239 CC_EX = 1,
246 CC_DI = 2,
247 CC_EI = 1,
248 CC_HALT = 1, // TODO check
249 CC_IM = 3,
250
253
254 CC_NMI = 1+P+2, EE_NMI_1 = -1, // TODO check
255 CC_IRQ0 = 1+P+2, EE_IRQ0_1 = -1, // TODO check
256 CC_IRQ1 = 1+P+2, EE_IRQ1_1 = -1, // TODO check
257 CC_IRQ2 = 1+P+2+P+2, EE_IRQ2_1 = -1, CC_IRQ2_2 = 1+P+2+P, // TODO check
258
260 CC_DD = 1,
262 CC_DD_CB = 1, // +1
263 EE_ED = 1,
266
267 template<typename Archive>
268 void serialize(Archive& ar, unsigned version)
269 {
270 CPUClock::serialize(ar, version);
271 ar.serialize("lastRefreshTime", lastRefreshTime,
272 "lastPage", lastPage,
273 "extraMemoryDelay", extraMemoryDelay);
274
275 // don't serialize 'extraMemoryDelays', is initialized in
276 // constructor and setDRAMmode()
277 }
278
279private:
280 Clock<CLOCK_FREQ> lastRefreshTime;
281 int lastPage;
282
283 unsigned extraMemoryDelays[4][4][4];
284 unsigned extraMemoryDelay[4];
285};
286
287} // namespace openmsx
288
289#endif
Definition: one_of.hh:7
void add(unsigned ticks)
Definition: CPUClock.hh:27
void serialize(Archive &ar, unsigned version)
Definition: CPUClock.cc:21
EmuTime getTimeFast() const
Definition: CPUClock.hh:36
void setTime(EmuTime::param time)
Definition: CPUClock.hh:40
void waitForEvenCycle(int cc)
R800 runs at 7MHz, but I/O is done over a slower 3.5MHz bus.
Definition: CPUClock.hh:64
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:251
static constexpr int CC_CPI
Definition: R800.hh:203
static constexpr int CC_LD_R_R
Definition: R800.hh:175
static constexpr int CC_NEG
Definition: R800.hh:244
static constexpr int CC_LD_HL_N_2
Definition: R800.hh:180
ALWAYS_INLINE void PRE_MEM(unsigned address)
Definition: R800.hh:74
static constexpr int CC_RETN
Definition: R800.hh:212
static constexpr int CC_CALL
Definition: R800.hh:208
static constexpr int CC_LD_HL_XX_2
Definition: R800.hh:185
static constexpr int CC_LD_XX_HL_1
Definition: R800.hh:188
static constexpr int CC_IM
Definition: R800.hh:249
static constexpr int CC_LD_R_HL_1
Definition: R800.hh:177
static constexpr int CC_JR_1
Definition: R800.hh:215
static constexpr int CC_LDI_2
Definition: R800.hh:201
static constexpr int CC_CPI_1
Definition: R800.hh:203
static constexpr int CC_LD_NN_A
Definition: R800.hh:182
static constexpr int CC_LD_HL_N_1
Definition: R800.hh:180
static constexpr int CC_PUSH_1
Definition: R800.hh:206
static constexpr int CC_BIT_XIX
Definition: R800.hh:222
static constexpr int CC_INC_XIX_1
Definition: R800.hh:196
static constexpr int CC_JP_A
Definition: R800.hh:213
void serialize(Archive &ar, unsigned version)
Definition: R800.hh:268
static constexpr int CC_BIT_XHL
Definition: R800.hh:221
static constexpr int CC_LD_NN_A_2
Definition: R800.hh:182
static constexpr int CC_LD_HL_XX_1
Definition: R800.hh:185
static constexpr int CC_BIT_XHL_1
Definition: R800.hh:221
static constexpr int CC_LD_XIX_N
Definition: R800.hh:184
static constexpr int CC_WRMEM
Definition: R800.hh:265
static constexpr int CC_NOP
Definition: R800.hh:240
static constexpr int CC_RST
Definition: R800.hh:210
static constexpr int CC_JR_B
Definition: R800.hh:215
ALWAYS_INLINE void PRE_WORD(unsigned address)
Definition: R800.hh:99
static constexpr int CC_LD_SS_NN
Definition: R800.hh:187
static constexpr int CC_LD_NN_A_1
Definition: R800.hh:182
static constexpr int CC_CP_XHL_1
Definition: R800.hh:192
static constexpr int EE_ED
Definition: R800.hh:263
static constexpr int CC_JP_HL
Definition: R800.hh:214
static constexpr int CC_CALL_A
Definition: R800.hh:209
static constexpr int CC_LD_SP_HL
Definition: R800.hh:186
static constexpr int CC_DI
Definition: R800.hh:246
ALWAYS_INLINE unsigned getMemPtr() const
Definition: R800.hh:162
static constexpr int CC_LD_A_NN_1
Definition: R800.hh:173
static constexpr int CC_INC_XIX
Definition: R800.hh:196
static constexpr int EE_IRQ1_1
Definition: R800.hh:256
static constexpr int CC_RLD
Definition: R800.hh:228
static constexpr int CC_LD_XIX_N_1
Definition: R800.hh:184
static constexpr int CC_NMI
Definition: R800.hh:254
static constexpr int CLOCK_FREQ
Definition: R800.hh:34
static constexpr bool IS_R800
Definition: R800.hh:36
ALWAYS_INLINE void setMemPtr(unsigned)
Definition: R800.hh:161
static constexpr int CC_CP_XIX_1
Definition: R800.hh:193
static constexpr int CC_INC_SS
Definition: R800.hh:197
void setTime(EmuTime::param time)
Definition: R800.hh:151
static constexpr int CC_LD_A_SS_1
Definition: R800.hh:172
static constexpr int CC_RET_A
Definition: R800.hh:211
static constexpr int CC_IRQ1
Definition: R800.hh:256
static constexpr int CC_LD_HL_XX
Definition: R800.hh:185
static constexpr int EE_RET_C
Definition: R800.hh:211
ALWAYS_INLINE void R800ForcePageBreak()
Definition: R800.hh:68
static constexpr int CC_LD_SS_NN_1
Definition: R800.hh:187
static constexpr int CC_CALL_B
Definition: R800.hh:209
static constexpr int CC_LD_XIX_N_2
Definition: R800.hh:184
static constexpr int CC_RDMEM
Definition: R800.hh:264
static constexpr int CC_SET_XHL_1
Definition: R800.hh:224
static constexpr int CC_ADD_HL_SS
Definition: R800.hh:198
static constexpr int CC_BIT_R
Definition: R800.hh:220
static constexpr int CC_CP_XHL
Definition: R800.hh:192
static constexpr int CC_MULUW
Definition: R800.hh:252
static constexpr int CC_DAA
Definition: R800.hh:243
static constexpr int CC_MAIN
Definition: R800.hh:259
static constexpr int CC_LD_R_N
Definition: R800.hh:176
static constexpr int CC_BIT_XIX_1
Definition: R800.hh:222
static constexpr int P
Definition: R800.hh:169
static constexpr int CC_EI
Definition: R800.hh:247
static constexpr int CC_JP_B
Definition: R800.hh:213
static constexpr int CC_CCF
Definition: R800.hh:241
static constexpr int CC_LD_HL_N
Definition: R800.hh:180
static constexpr int CC_INC_XHL
Definition: R800.hh:195
static constexpr int CC_EX_SP_HL
Definition: R800.hh:218
static constexpr int CC_OUT_C_R
Definition: R800.hh:235
static constexpr int CC_EX
Definition: R800.hh:239
static constexpr int CC_PUSH
Definition: R800.hh:206
void updateVisiblePage(byte page, byte primarySlot, byte secondarySlot)
Definition: R800.hh:16
ALWAYS_INLINE void R800Refresh(CPURegs &R)
Definition: R800.hh:128
static constexpr int CC_RET_B
Definition: R800.hh:211
static constexpr int CC_SET_XHL
Definition: R800.hh:224
ALWAYS_INLINE void POST_WORD(unsigned address)
Definition: R800.hh:120
R800TYPE(EmuTime::param time, Scheduler &scheduler_)
Definition: R800.hh:38
static constexpr int CC_LD_HL_R
Definition: R800.hh:179
static constexpr int CC_LD_A_NN
Definition: R800.hh:173
static constexpr int CC_LD_R_XIX_1
Definition: R800.hh:178
static constexpr int CC_HALT
Definition: R800.hh:248
static constexpr int CC_EX_SP_HL_1
Definition: R800.hh:218
static constexpr int CC_SCF
Definition: R800.hh:242
static constexpr int CC_LD_XIX_R_2
Definition: R800.hh:183
static constexpr int CC_CP_N_1
Definition: R800.hh:191
static constexpr int CC_LD_R_HL
Definition: R800.hh:177
static constexpr int CC_LD_A_NN_2
Definition: R800.hh:173
static constexpr int CC_LD_SS_A
Definition: R800.hh:181
static constexpr int CC_EX_SP_HL_2
Definition: R800.hh:218
ALWAYS_INLINE void POST_MEM(unsigned address)
Definition: R800.hh:91
static constexpr int CC_CP_R
Definition: R800.hh:190
static constexpr int O
Definition: R800.hh:165
static constexpr int CC_LD_HL_R_1
Definition: R800.hh:179
static constexpr int CC_LD_XX_HL_2
Definition: R800.hh:188
static constexpr int CC_INI
Definition: R800.hh:232
static constexpr int CC_OUT_N_A_2
Definition: R800.hh:234
static constexpr unsigned HALT_STATES
Definition: R800.hh:35
static constexpr int EE_CALL
Definition: R800.hh:208
static constexpr int CC_LD_XIX_R
Definition: R800.hh:183
NEVER_INLINE void R800RefreshSlow(EmuTime::param time, CPURegs &R)
Definition: R800.hh:140
static constexpr int CC_CALL_1
Definition: R800.hh:208
static constexpr int CC_IRQ2
Definition: R800.hh:257
void setDRAMmode(bool dram)
Definition: R800.hh:21
static constexpr int CC_DJNZ
Definition: R800.hh:216
static constexpr int CC_OUT_C_R_1
Definition: R800.hh:235
static constexpr int CC_OTIR
Definition: R800.hh:237
static constexpr int CC_RLD_1
Definition: R800.hh:228
static constexpr int CC_LD_SS_A_1
Definition: R800.hh:181
static constexpr int CC_POP_1
Definition: R800.hh:207
static constexpr int EE_RETN
Definition: R800.hh:212
static constexpr int CC_LD_XX_HL
Definition: R800.hh:188
static constexpr int CC_SET_XIX
Definition: R800.hh:225
static constexpr int CC_IN_R_C
Definition: R800.hh:231
static constexpr int CC_IRQ0
Definition: R800.hh:255
static constexpr int CC_INC_R
Definition: R800.hh:194
static constexpr int CC_LDI
Definition: R800.hh:201
static constexpr int CC_LD_XIX_R_1
Definition: R800.hh:183
static constexpr int CC_CP_XIX
Definition: R800.hh:193
static constexpr int CC_DD
Definition: R800.hh:260
static constexpr int CC_OUT_N_A_1
Definition: R800.hh:234
static constexpr int CC_OUTI_1
Definition: R800.hh:236
static constexpr int CC_IN_A_N_1
Definition: R800.hh:230
static constexpr int CC_INC_XHL_1
Definition: R800.hh:195
static constexpr int CC_LDIR
Definition: R800.hh:202
static constexpr int CC_RLD_2
Definition: R800.hh:228
static constexpr int CC_IN_A_N
Definition: R800.hh:230
static constexpr int EE_NMI_1
Definition: R800.hh:254
static constexpr int CC_CPIR
Definition: R800.hh:204
static constexpr int CC_JR_A
Definition: R800.hh:215
static constexpr int CC_LD_R_XIX_2
Definition: R800.hh:178
static constexpr int EE_IRQ0_1
Definition: R800.hh:255
static constexpr int CC_LD_A_SS
Definition: R800.hh:172
static constexpr int CC_CPL
Definition: R800.hh:245
static constexpr int CC_IN_R_C_1
Definition: R800.hh:231
static constexpr int I
Definition: R800.hh:164
static constexpr int CC_SET_XHL_2
Definition: R800.hh:224
static constexpr int CC_INIR
Definition: R800.hh:233
static constexpr int CC_SET_R
Definition: R800.hh:223
static constexpr int CC_CP_XIX_2
Definition: R800.hh:193
static constexpr int EE_INC_XIX
Definition: R800.hh:196
static constexpr int CC_JP_1
Definition: R800.hh:213
static constexpr int EE_IRQ2_1
Definition: R800.hh:257
static constexpr int CC_OUTI
Definition: R800.hh:236
static constexpr int CC_LD_R_N_1
Definition: R800.hh:176
static constexpr int EE_DJNZ
Definition: R800.hh:216
static constexpr int CC_ADC_HL_SS
Definition: R800.hh:199
static constexpr int CC_LD_A_I
Definition: R800.hh:174
static constexpr int CC_OUTI_2
Definition: R800.hh:236
static constexpr int CC_CP_N
Definition: R800.hh:191
static constexpr int CC_LD_R_XIX
Definition: R800.hh:178
static constexpr int CC_DD_CB
Definition: R800.hh:262
static constexpr int CC_PREFIX
Definition: R800.hh:261
static constexpr int CC_POP
Definition: R800.hh:207
static constexpr int CC_INI_2
Definition: R800.hh:232
static constexpr int EE_SET_XIX
Definition: R800.hh:225
static constexpr int CC_IRQ2_2
Definition: R800.hh:257
static constexpr int CC_RLA
Definition: R800.hh:227
static constexpr int CC_INC_XHL_2
Definition: R800.hh:195
static constexpr int CC_OUT_N_A
Definition: R800.hh:234
static constexpr int CC_LDI_1
Definition: R800.hh:201
static constexpr int CC_INI_1
Definition: R800.hh:232
static constexpr int CC_IN_A_N_2
Definition: R800.hh:230
#define NEVER_INLINE
Definition: inline.hh:17
#define ALWAYS_INLINE
Definition: inline.hh:16
This file implemented 3 utility functions:
Definition: Autofire.cc:9
constexpr auto R
Definition: MSXMixer.cc:298
static constexpr bool value
Definition: R800.hh:32
constexpr auto xrange(T e)
Definition: xrange.hh:133