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https://github.com/holub/mame
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n64: Simulation of cpu cycles that would be used during the skipped RDRAM initialization. This allows the initialization of the SI to see a closer to expected system uptime when requested.
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c7cf9ee627
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@ -2701,6 +2701,11 @@ void mips3_device::handle_special(UINT32 op)
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}
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}
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void mips3_device::burn_cycles(INT32 cycles)
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{
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execute_burn(cycles);
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}
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void mips3_device::execute_run()
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{
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if (m_isdrc)
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@ -300,7 +300,8 @@ public:
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void clear_fastram(UINT32 select_start);
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void mips3drc_set_options(UINT32 options);
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void mips3drc_add_hotspot(offs_t pc, UINT32 opcode, UINT32 cycles);
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void burn_cycles(INT32 cycles);
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protected:
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// device-level overrides
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virtual void device_start();
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@ -313,6 +314,7 @@ protected:
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virtual UINT32 execute_input_lines() const { return 6; }
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virtual void execute_run();
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virtual void execute_set_input(int inputnum, int state);
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virtual void execute_burn(INT32 cycles) { m_totalcycles += cycles; }
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// device_memory_interface overrides
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virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const { return (spacenum == AS_PROGRAM) ? &m_program_config : NULL; }
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@ -1667,6 +1667,20 @@ WRITE32_MEMBER( n64_periphs::pi_reg_w )
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READ32_MEMBER( n64_periphs::ri_reg_r )
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{
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if(offset == 0x0C/4) // RI_SELECT
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{
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/* This is to 'simulate' the time that RDRAM initialization
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would take if the RI registers were not set to skip the RDRAM
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testing during device reset. Proper simulation would require
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emulating the RDRAM modules and bus stalls for the mips cpu.
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The cycle amount chosen represents 1/2 second, which is not
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necessarily the time for RDRAM initialization, but rather the
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time recommended for letting the SI devices settle after startup.
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This allows the initialization routines for the SI to see that a
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proper amount of time has passed since system startup. */
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machine().device<mips3_device>("maincpu")->burn_cycles(93750000/2);
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}
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if(offset > 0x1c/4)
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{
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logerror("ri_reg_r: %08X, %08X at %08X\n", offset, mem_mask, maincpu->safe_pc());
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@ -61,18 +61,18 @@ sf7000 // Sega SC-3000 w/ SF-7000 (Japan)
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omv1000 // Tsukuda Original Othello Multivision FG-1000
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omv2000 // Tsukuda Original Othello Multivision FG-2000
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gamegear // Sega GameGear
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gamegeaj // Sega GameGear (Japan)
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sms // Sega Master System II (NTSC)
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sms1 // Sega Master System I (NTSC)
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sms1pal // Sega Master System I (PAL)
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smspal // Sega Master System II (PAL)
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smsj // Sega Master System (Japan) with FM Chip
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sg1000m3 // Sega SG-1000 Mark III (Japan)
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sms1krfm // Samsung Gam*Boy I (Korea) with FM Chip
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sms1kr // Samsung Gam*Boy I (Korea)
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smskr // Samsung Gam*Boy II (Korea)
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smssdisp // Sega Master System Store Display Unit
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//gamegear // Sega GameGear
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//gamegeaj // Sega GameGear (Japan)
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//sms // Sega Master System II (NTSC)
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//sms1 // Sega Master System I (NTSC)
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//sms1pal // Sega Master System I (PAL)
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//smspal // Sega Master System II (PAL)
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//smsj // Sega Master System (Japan) with FM Chip
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//sg1000m3 // Sega SG-1000 Mark III (Japan)
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//sms1krfm // Samsung Gam*Boy I (Korea) with FM Chip
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//sms1kr // Samsung Gam*Boy I (Korea)
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//smskr // Samsung Gam*Boy II (Korea)
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//smssdisp // Sega Master System Store Display Unit
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megadrij // 1988 Sega Mega Drive (Japan)
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genesis // 1989 Sega Genesis (USA)
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@ -117,7 +117,7 @@ dceu // 1999 Sega Dreamcast (Europe)
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dcdev // 1998 Sega HKT-0120 Sega Dreamcast Development Box
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dcprt // 1998 Sega Katana Set 5 Prototype
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svmu // 1998 Sega Visual Memory Unit
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//svmu // 1998 Sega Visual Memory Unit
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// Sony
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psj // 1994 Sony PlayStation (Japan)
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@ -385,7 +385,7 @@ f1
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f1e
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f2
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f10
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fp
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//fp
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// Cambridge Computers
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z88 // Z88 (UK)
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@ -661,22 +661,22 @@ c64gs // Commodore 64 Games System
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c64dtv // Commodore 64 Direct-to-TV
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clcd // Commodore LCD
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b500 // Commodore B500
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b128 // Commodore B128
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b256 // Commodore B256
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cbm610 // Commodore CBM 610
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cbm620 // Commodore CBM 620
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cbm620_hu // Commodore CBM 620 (Hungary)
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b128hp // Commodore B128HP
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b256hp // Commodore B256HP
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bx256hp // Commodore BX256HP
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cbm710 // Commodore CBM 710
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cbm720 // Commodore CBM 720
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cbm720_de
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cbm720_se // Commodore CBM 720 (Sweden / Finland)
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cbm730
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p500 // Commodore P500 (proto, a.k.a. C128-40, PET-II)
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p500p
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//b500 // Commodore B500
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//b128 // Commodore B128
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//b256 // Commodore B256
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//cbm610 // Commodore CBM 610
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//cbm620 // Commodore CBM 620
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//cbm620_hu // Commodore CBM 620 (Hungary)
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//b128hp // Commodore B128HP
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//b256hp // Commodore B256HP
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//bx256hp // Commodore BX256HP
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//cbm710 // Commodore CBM 710
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//cbm720 // Commodore CBM 720
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//cbm720_de
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//cbm720_se // Commodore CBM 720 (Sweden / Finland)
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//cbm730
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//p500 // Commodore P500 (proto, a.k.a. C128-40, PET-II)
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//p500p
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c264
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plus4
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@ -732,8 +732,8 @@ a4000tn
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c65 // 1991 C65 / C64DX (Prototype, NTSC)
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c64dx // 1991 C65 / C64DX (Prototype, German PAL)
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mps1000 // 1986 Commodore MPS-1000 (dot matrix printer)
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mps1230 // 1988 Commodore MPS-1230 near-letter-quality dot matrix printer
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//mps1000 // 1986 Commodore MPS-1000 (dot matrix printer)
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//mps1230 // 1988 Commodore MPS-1230 near-letter-quality dot matrix printer
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// Epson
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px4 // 1985 Epson PX-4
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@ -1785,8 +1785,8 @@ abc806
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abc1600
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// Be Incorporated
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bebox // BeBox Dual603-66
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bebox2 // BeBox Dual603-133
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//bebox // BeBox Dual603-66
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//bebox2 // BeBox Dual603-133
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// Tiger Electronics
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gamecom // Tiger Game.com
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@ -1866,8 +1866,8 @@ bk0010fd
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bk0011m
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// Bashkiria-2M
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b2m
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b2mrom
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//b2m
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//b2mrom
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// Radio-86RK
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radio86
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@ -1897,10 +1897,10 @@ braiplus
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irisha
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// PK-8020
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korvet
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kontur
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neiva
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bk8t
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//korvet
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//kontur
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//neiva
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//bk8t
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// Vector-06c
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vector06
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@ -2522,7 +2522,7 @@ uvc
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bridgec3
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vbrc
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vsc
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victor9k
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//victor9k
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phc25
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phc25j
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pv9234
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