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hng64: MIPS side IRQ notes (nw) (#3826)

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* hng64: MIPS side IRQ notes (nw)

* notes (nw)

* samsho64 irq notes (nw)

* notes (nw)

* some irq address notes (nw)
This commit is contained in:
David Haywood 2018-08-05 20:47:10 +01:00 committed by ajrhacker
parent 3f40d2350d
commit 69dc3965bd
1 changed files with 234 additions and 14 deletions
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248
src/mame/drivers/hng64.cpp
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@ -530,9 +530,13 @@ READ32_MEMBER(hng64_state::hng64_sysregs_r)
case 0x001c: return machine().rand(); // hng64 hangs on start-up if zero. case 0x001c: return machine().rand(); // hng64 hangs on start-up if zero.
//case 0x106c: //case 0x106c:
//case 0x107c: //case 0x107c:
case 0x1084: return 0x00000002; //MCU->MIPS latch port case 0x1084:
logerror("%s: HNG64 reading MCU status port (%08x)\n", machine().describe_context(), mem_mask);
return 0x00000002; //MCU->MIPS latch port
//case 0x108c: //case 0x108c:
case 0x1104: return m_irq_level; case 0x1104:
logerror("%s: irq level READ %04x\n", machine().describe_context(),m_irq_level);
return m_irq_level;
case 0x111c: case 0x111c:
//printf("Read to IRQ ACK?\n"); //printf("Read to IRQ ACK?\n");
break; break;
@ -593,7 +597,7 @@ WRITE32_MEMBER(hng64_state::hng64_sysregs_w)
{ {
case 0x1084: //MIPS->MCU latch port case 0x1084: //MIPS->MCU latch port
m_mcu_en = (data & 0xff); //command-based, i.e. doesn't control halt line and such? m_mcu_en = (data & 0xff); //command-based, i.e. doesn't control halt line and such?
//printf("HNG64 writing to SYSTEM Registers 0x%08x == 0x%08x. (PC=%08x)\n", offset*4, m_sysregs[offset], m_maincpu->pc()); logerror("%s: HNG64 writing to MCU control port %08x (%08x)\n", machine().describe_context(), data, mem_mask);
break; break;
//0x110c global irq mask? //0x110c global irq mask?
/* irq ack */ /* irq ack */
@ -750,11 +754,13 @@ READ32_MEMBER(hng64_state::hng64_dualport_r)
//printf("dualport R %08x %08x (PC=%08x)\n", offset*4, hng64_dualport[offset], m_maincpu->pc()); //printf("dualport R %08x %08x (PC=%08x)\n", offset*4, hng64_dualport[offset], m_maincpu->pc());
/* /*
I'm not really convinced these are commands in this sense based on code analysis, probably just a non-standard way of controlling the lines
command table: command table:
0x0b = ? mode input polling (sams64, bbust2, sams64_2 & roadedge) (*) 0x0b = ? mode input polling (sams64, bbust2, sams64_2 & roadedge) (*)
0x0c = cut down connections, treats the dualport to be normal RAM 0x0c = cut down connections, treats the dualport to be normal RAM
0x11 = ? mode input polling (fatfurwa, xrally, buriki) (*) 0x11 = ? mode input polling (fatfurwa, xrally, buriki) (*)
0x20 = asks for MCU machine code 0x20 = asks for MCU machine code (probably not, this is also written in the function after the TLCS870 requests an interrupt on the MIPS)
(*) 0x11 is followed by 0x0b if the latter is used, JVS-esque indirect/direct mode? (*) 0x11 is followed by 0x0b if the latter is used, JVS-esque indirect/direct mode?
*/ */
@ -802,7 +808,7 @@ WRITE32_MEMBER(hng64_state::hng64_dualport_w)
(currently we use m_dualport due to simulation, but this should actually be the same RAM as m_ioram) (currently we use m_dualport due to simulation, but this should actually be the same RAM as m_ioram)
*/ */
COMBINE_DATA(&m_dualport[offset]); COMBINE_DATA(&m_dualport[offset]);
logerror("%s: dualport WRITE %08x (%08x)\n", machine().describe_context(), offset * 4, data, mem_mask); logerror("%s: dualport WRITE %08x %08x (%08x)\n", machine().describe_context(), offset * 4, data, mem_mask);
} }
@ -1472,15 +1478,229 @@ void hng64_state::set_irq(uint32_t irq_vector)
- is there an irq mask mechanism? - is there an irq mask mechanism?
- is irq level cleared too when the irq acks? - is irq level cleared too when the irq acks?
This is written with irqs DISABLED IRQ level read at 0x80008cac
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000001. (PC=80009b54) 0 vblank irq IO RAM is at bf808000 on the MIPS
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000002. (PC=80009b5c) 1 <empty>
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000004. (PC=80009b64) 2 <empty> -- irq table in Fatal Fury WA - 'empty' entries just do minimum 'interrupt service' with no real function.
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000008. (PC=80009b6c) 3 3d fifo processed irq 80000400: 80039F20 irq00 vblank irq
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000200. (PC=80009b70) 9 80000404: 80039F84 1rq01 jump based on ram content
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000400. (PC=80009b78) 10 80000408: 8003A08C irq02 'empty'
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00020000. (PC=80009b80) 17 MCU related irq 8000040C: 8006FF04 irq03 3d FIFO?
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000800. (PC=80009b88) 11 network irq, needed by xrally and roadedge 80000410: A0000410 irq04 INVALID
80000414: A0000414 irq05 INVALID
80000418: A0000418 irq06 INVALID
8000041C: A000041C irq07 INVALID
80000420: A0000420 irq08 INVALID
80000424: 8003A00C irq09 'empty' writes to sysreg 1074 instead of loading/storing regs tho
80000428: 80039FD0 irq0a 'empty' writes to sysreg 1074 instead of loading/storing regs tho
8000042C: 8003A0C0 irq0b 'empty'(network on xrally?) writes to sysreg 1074 instead of loading/storing regs tho
80000430: 8003A050 irq0c 'empty' writes to sysreg 1074 instead of loading/storing regs tho
80000434: A0000434 irq0d INVALID
80000438: A0000438 irq0e INVALID
8000043C: A000043C irq0f INVALID
80000440: A0000440 irq10 INVALID
80000444: 8003A0FC irq11 IO MCU related? write to sysreg 1084 instead of loading/storing regs, accesses dualport RAM
80000448: A0000448 irq12 INVALID
8000044C: A000044C irq13 INVALID
80000450: A0000450 irq14 INVALID
80000454: A0000454 irq15 INVALID
80000458: A0000458 irq16 INVALID
8000045C: 8003A1D4 irq17 'empty' write to sysreg 1084 instead of loading/storing regs tho (like irq 0x11)
80000460: A0000460 irq18 INVALID
(all other entries, invalid)
Xrally (invalid IRQs are more obviously invalid, pointing at 0)
80000400: 80016ED0 irq00
80000404: 80016F58 irq01
80000408: 80017048 irq02
8000040C: 80013484 irq03
80000410: 00000000 irq04 INVALID
80000414: 00000000 irq05 INVALID
80000418: 00000000 irq06 INVALID
8000041C: 00000000 irq07 INVALID
80000420: 00000000 irq08 INVALID
80000424: 80016FC8 irq09
80000428: 80016F8C irq0a
8000042C: 8001707C irq0b
80000430: 8001700C irq0c
80000434: 00000000 irq0d INVALID
80000438: 00000000 irq0e INVALID
8000043C: 00000000 irq0f INVALID
80000440: 00000000 irq10 INVALID
80000444: 800170C0 irq11
80000448: 00000000 irq12 INVALID
8000044C: 00000000 irq13 INVALID
80000450: 00000000 irq14 INVALID
80000454: 00000000 irq15 INVALID
80000458: 00000000 irq16 INVALID
8000045C: 80017198 irq17
80000460: 00000000 irq18 INVALID
(all other entries, invalid)
Buriki
80000400: 800C49C4
80000404: 800C4748
80000408: 800C4828
8000040C: 800C4B80
80000410: 00000000
80000414: 00000000
80000418: 00000000
8000041C: 00000000
80000420: 00000000
80000424: 800C47B0
80000428: 800C4778
8000042C: 800C4858
80000430: 800C47F0
80000434: 00000000
80000438: 00000000
8000043C: 00000000
80000440: 00000000
80000444: 800C4890
80000448: 00000000
8000044C: 00000000
80000450: 00000000
80000454: 00000000
80000458: 00000000
8000045C: 800C498C
80000460: 00000000
Beast Busters 2
80000400: 8000E9D8
80000404: 8000EAFC
80000408: 8000EBFC
8000040C: 80012D90
80000410: FFFFFFFF
80000414: FFFFFFFF
80000418: FFFFFFFF
8000041C: FFFFFFFF
80000420: FFFFFFFF
80000424: 8000EB74
80000428: 8000EB34
8000042C: 8000EC34
80000430: 8000EBBC
80000434: FFFFFFFF
80000438: FFFFFFFF
8000043C: FFFFFFFF
80000440: FFFFFFFF
80000444: 8000E508
80000448: FFFFFFFF
8000044C: FFFFFFFF
80000450: FFFFFFFF
80000454: FFFFFFFF
80000458: FFFFFFFF
8000045C: FFFFFFFF irq17 INVALID (not even a stub routine here)
80000460: FFFFFFFF
Roads Edge
80000400: 80028B04
80000404: 80028B88
80000408: 80028C68
8000040C: 80036FAC
80000410: 00000000
80000414: 00000000
80000418: 00000000
8000041C: 00000000
80000420: 00000000
80000424: 80028BF0
80000428: 80028BB8
8000042C: 80028C98
80000430: 80028C30
80000434: 00000000
80000438: 00000000
8000043C: 00000000
80000440: 00000000
80000444: 80027340
80000448: 00000000
8000044C: 00000000
80000450: 00000000
80000454: 00000000
80000458: 00000000
8000045C: 00000000 irq17 INVALID (not even a stub routine here)
80000460: 00000000
SamSho 64 code is more complex, irqs point to functions that get a jump address from a fixed ram location for each IRQ, most are invalid tho?
the ingame table is copied from 80005DD0
bootup ingame
80000400: 800C03E0 irq00 80005dd0 800c02e0 800cfcc8
80000404: 800C041C irq01 80005dd4 800c0000
80000408: 800C0458 irq02 80005dd8 800c0000
8000040C: 800C0494 irq03 80005ddc 800c3054 800cfd58
80000410: 800C04D0 irq04 80005de0 800c3070 800cfdf8 - interesting because this level is invalid on other games
80000414: 800C032C irq05 80000478 00000000
80000418: 800C0368 irq06 80000478 00000000
8000041C: 800C03A4 irq07 80000478 00000000
80000420: 800C050C irq08 80005df0 800c0000
80000424: 800C0548 irq09 80005df4 800c0000
80000428: 800C0584 irq0a 80005df8 800c0000
8000042C: 800C05C0 irq0b 80005dfc 800c0000
80000430: 800C05FC irq0c 80005e00 800c0000
80000434: 800C02F0 irq0d 80000478 00000000
80000438: 800C02F0 irq0e 80000478 00000000
8000043C: 800C02F0 irq0f 80000478 00000000
80000440: 800C0638 irq10 80005e10 800c0000
80000444: 800C0674 irq11 80005e14 800c0000
80000448: 800C06B0 irq12 80005e18 800c0000
8000044C: 800C06EC irq13 80005e1c 800c0000
80000450: 800C0728 irq14 80005e20 800c0000
80000454: 800C0764 irq15 80005e24 800c0000
80000458: 800C07A0 irq16 80005e28 800c0000
8000045C: 800C07DC irq17 80005e2c 800c0000
80000460: 00000000 (invalid)
SamSho 64 2 is the same types as SamSho 64
bootup ingame
80000400: 801008DC irq00 802011e0 801007e0 8011f6b4
80000404: 80100918 irq01 802011e4 80100500
80000408: 80100954 irq02 802011e8 80100500
8000040C: 80100990 irq03 802011ec 80101b38 8011f7b8
80000410: 801009CC irq04 802011f0 80101b54 80101b54
80000414: 80100828 irq05 80000478 0000000b
80000418: 80100864 irq06 80000478 0000000b
8000041C: 801008A0 irq07 80000478 0000000b
80000420: 80100A08 irq08 80201200 80100500
80000424: 80100A44 irq09 80201204 80100500
80000428: 80100A80 irq0a 80201208 80100500
8000042C: 80100ABC irq0b 8020120c 80100500
80000430: 80100AF8 irq0c 80201210 80100500
80000434: 801007EC irq0d 80000478 0000000b
80000438: 801007EC irq0e 80000478 0000000b
8000043C: 801007EC irq0f 80000478 0000000b
80000440: 80100B34 irq10 80201220 80100500
80000444: 80100B70 irq11 80201224 80100500
80000448: 80100BAC irq12 80201228 80100500
8000044C: 80100BE8 irq13 8020122c 80100500
80000450: 80100C24 irq14 80201230 80100500
80000454: 80100C60 irq15 80201234 80100500
80000458: 80100C9C irq16 80201238 80100500
8000045C: 80100CD8 irq17 8020123c 80100500
80000460: 00000000 (invalid)
Register 111c is connected to the interrupts and written in each one (IRQ ack / latch clear?)
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000001. (PC=80009b54) 0x00 vblank irq
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000002. (PC=80009b5c) 0x01 <empty> (not empty of ffwa)
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000004. (PC=80009b64) 0x02 <empty>
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000008. (PC=80009b6c) 0x03 3d fifo processed irq
00010
00020
00040
00080
00100
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000200. (PC=80009b70) 0x09
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000400. (PC=80009b78) 0x0a
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000800. (PC=80009b88) 0x0b network irq, needed by xrally and roadedge
01000
02000
04000
08000
10000
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00020000. (PC=80009b80) 0x11 MCU related irq?
40000
80000
100000
200000
400000
800000 0x17 MCU related irq?
samsho64 / samsho64_2 does this during running: samsho64 / samsho64_2 does this during running:
HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000000. (PC=800008fc) just checking? HNG64 writing to SYSTEM Registers 0x0000111c == 0x00000000. (PC=800008fc) just checking?