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https://github.com/holub/mame
synced 2025-05-23 14:19:01 +03:00
Fixed address mirroring on the slave sound cpu on Zaccaria hardware; it seems possible that the /NMI triggered test mode (triggered by a push button on the sound pcb) doesn't work on real hardware at all.
This commit is contained in:
Jonathan Gevaryahu
parent
bd29cc08b1
commit
bafa2023e9
@ -31,7 +31,9 @@ Notes:
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- The 6802 driving the TMS5220 has a push button connected to the NMI line. On
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Zaccaria pinballs, when pressed, this causes the speech 6802 and the slave
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sound 6802 to play a few speech effects and sound effects;
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This currently doesn't work in MAME
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This currently doesn't work in MAME, and tracing the code it seems the code is
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possibly broken, made up of nonfunctional leftovers of some of the pinball test
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mode code.
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***************************************************************************/
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@ -286,18 +288,38 @@ static ADDRESS_MAP_START( main_map, ADDRESS_SPACE_PROGRAM, 8 )
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ADDRESS_MAP_END
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/* slave sound cpu, produces music and sound effects */
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/* mapping:
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A15 A14 A13 A12 A11 A10 A09 A08 A07 A06 A05 A04 A03 A02 A01 A00
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0 0 0 0 0 0 0 0 0 * * * * * * * RW 6802 internal ram
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0 0 0 x x x x x x x x x x x x x Open bus (for area that doesn't overlap ram)
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0 0 1 x x x x x x x x x x x x x Open bus
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0 1 0 x x x x x x x x x 0 0 x x Open bus
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0 1 0 x x x x x x x x x 0 1 x x Open bus
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0 1 0 x x x x x x x x x 1 0 x x Open bus
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0 1 0 x x x x x x x x x 1 1 * * RW 6821 PIA @ 4I
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0 1 1 x x x x x x x x x x x x x Open bus
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1 0 % % * * * * * * * * * * * * R /CS4A: Enable Rom 13
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1 1 % % * * * * * * * * * * * * R /CS5A: Enable Rom 9
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note that the % bits go to pins 2 (6802 A12) and 26 (6802 A13) of the roms
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monymony and jackrabt both use 2764 roms, which use pin 2 as A12 and pin 26 as N/C don't care
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hence for actual chips used, the mem map is:
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1 0 x * * * * * * * * * * * * * R /CS4A: Enable Rom 13
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1 1 x * * * * * * * * * * * * * R /CS5A: Enable Rom 9
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6821 PIA: CA1 comes from the master sound cpu's latch bit 7 (which is also connected to the AY chip at 4G's IOB1); CB1 comes from a periodic counter clocked by the 6802's clock, divided by 4096. CA2 and CB2 are disconnected. PA0-7 connect to the data busses of the AY-3-8910 chips; PB0 and PB1 connect to the BC1 and BDIR pins of the AY chip at 4G; PB2 and PB3 connect to the BC1 and BDIR pins of the AY chip at 4H.
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*/
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static ADDRESS_MAP_START( sound_map_1, ADDRESS_SPACE_PROGRAM, 8 )
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AM_RANGE(0x0000, 0x007f) AM_RAM
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AM_RANGE(0x500c, 0x500f) AM_DEVREADWRITE("pia0", pia6821_r, pia6821_w)
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AM_RANGE(0xa000, 0xbfff) AM_ROM
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AM_RANGE(0xe000, 0xffff) AM_ROM
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AM_RANGE(0x500c, 0x500f) AM_DEVREADWRITE("pia0", pia6821_r, pia6821_w) AM_MIRROR(0x1ff0)
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AM_RANGE(0x8000, 0x9fff) AM_ROM AM_MIRROR(0x2000) // rom 13
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AM_RANGE(0xc000, 0xdfff) AM_ROM AM_MIRROR(0x2000) // rom 9
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ADDRESS_MAP_END
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/* master sound cpu, controls speech directly */
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/* mapping:
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A15 A14 A13 A12 A11 A10 A09 A08 A07 A06 A05 A04 A03 A02 A01 A00
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0 0 0 0 0 0 0 0 0 * * * * * * * RW 6802 internal ram
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**** x 0 0 0 x x x x 1 x x 0 x x * * Open bus (test mode writes as if there was another PIA here)
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x 0 0 0 x x x x 1 x x 1 x x * * RW 6821 PIA @ 1I
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x 0 0 1 0 0 x x x x x x x x x x W MC1408 DAC
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x x 0 1 0 1 x x x x x x x x x x W Command to slave sound1 cpu
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@ -310,6 +332,8 @@ ADDRESS_MAP_END
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hence for actual chips used, the mem map is:
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x * 1 0 * * * * * * * * * * * * R /CS1A: Enable Rom 8
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x * 1 1 * * * * * * * * * * * * R /CS0A: Enable Rom 7
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6821 PIA: PA0-7, CA2 and CB1 connect to the TMS5200; CA1 and CB2 are disconnected, though the test mode assumes there's something connected to CB2 (possibly another LED like the one connected to PB4); PB3 connects to 'ACS' which goes to the z80.
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*/
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static ADDRESS_MAP_START( sound_map_2, ADDRESS_SPACE_PROGRAM, 8 )
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AM_RANGE(0x0000, 0x007f) AM_RAM /* 6802 internal ram */
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@ -642,8 +666,8 @@ ROM_START( monymony )
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ROM_CONTINUE( 0xd000, 0x1000 )
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ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for first 6802 */
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ROM_LOAD( "snd13.2g", 0xa000, 0x2000, CRC(78b01b98) SHA1(2aabed56cdae9463deb513c0c5021f6c8dfd271e) )
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ROM_LOAD( "snd9.1i", 0xe000, 0x2000, CRC(94e3858b) SHA1(04961f67b95798b530bd83355dec612389f22255) )
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ROM_LOAD( "snd13.2g", 0x8000, 0x2000, CRC(78b01b98) SHA1(2aabed56cdae9463deb513c0c5021f6c8dfd271e) )
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ROM_LOAD( "snd9.1i", 0xc000, 0x2000, CRC(94e3858b) SHA1(04961f67b95798b530bd83355dec612389f22255) )
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ROM_REGION( 0x10000, "audio2", 0 ) /* 64k for second 6802 */
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ROM_LOAD( "snd8.1h", 0x2000, 0x1000, CRC(aad76193) SHA1(e08fc184efced392ee902c4cc9daaaf3310cdfe2) )
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@ -677,8 +701,8 @@ ROM_START( jackrabt )
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ROM_LOAD( "cpu-01.6h", 0xd000, 0x1000, CRC(dd5979cf) SHA1(e9afe7002b2258a1c3132bdd951c6e20d473fb6a) )
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ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for first 6802 */
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ROM_LOAD( "13snd.2g", 0xa000, 0x2000, CRC(fc05654e) SHA1(ed9c66672fe89c41e320e1d27b53f5efa92dce9c) )
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ROM_LOAD( "9snd.1i", 0xe000, 0x2000, CRC(3dab977f) SHA1(3e79c06d2e70b050f01b7ac58be5127ba87904b0) )
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ROM_LOAD( "13snd.2g", 0x8000, 0x2000, CRC(fc05654e) SHA1(ed9c66672fe89c41e320e1d27b53f5efa92dce9c) )
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ROM_LOAD( "9snd.1i", 0xc000, 0x2000, CRC(3dab977f) SHA1(3e79c06d2e70b050f01b7ac58be5127ba87904b0) )
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ROM_REGION( 0x10000, "audio2", 0 ) /* 64k for second 6802 */
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ROM_LOAD( "8snd.1h", 0x2000, 0x1000, CRC(f4507111) SHA1(0513f0831b94aeda84aa4f3b4a7c60dfc5113b2d) )
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@ -716,8 +740,8 @@ ROM_START( jackrabt2 )
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ROM_CONTINUE( 0xd000, 0x1000 )
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ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for first 6802 */
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ROM_LOAD( "13snd.2g", 0xa000, 0x2000, CRC(fc05654e) SHA1(ed9c66672fe89c41e320e1d27b53f5efa92dce9c) )
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ROM_LOAD( "9snd.1i", 0xe000, 0x2000, CRC(3dab977f) SHA1(3e79c06d2e70b050f01b7ac58be5127ba87904b0) )
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ROM_LOAD( "13snd.2g", 0x8000, 0x2000, CRC(fc05654e) SHA1(ed9c66672fe89c41e320e1d27b53f5efa92dce9c) )
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ROM_LOAD( "9snd.1i", 0xc000, 0x2000, CRC(3dab977f) SHA1(3e79c06d2e70b050f01b7ac58be5127ba87904b0) )
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ROM_REGION( 0x10000, "audio2", 0 ) /* 64k for second 6802 */
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ROM_LOAD( "8snd.1h", 0x2000, 0x1000, CRC(f4507111) SHA1(0513f0831b94aeda84aa4f3b4a7c60dfc5113b2d) )
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@ -751,8 +775,8 @@ ROM_START( jackrabts )
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ROM_CONTINUE( 0xd000, 0x1000 )
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ROM_REGION( 0x10000, "audiocpu", 0 ) /* 64k for first 6802 */
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ROM_LOAD( "13snd.2g", 0xa000, 0x2000, CRC(fc05654e) SHA1(ed9c66672fe89c41e320e1d27b53f5efa92dce9c) )
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ROM_LOAD( "9snd.1i", 0xe000, 0x2000, CRC(3dab977f) SHA1(3e79c06d2e70b050f01b7ac58be5127ba87904b0) )
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ROM_LOAD( "13snd.2g", 0x8000, 0x2000, CRC(fc05654e) SHA1(ed9c66672fe89c41e320e1d27b53f5efa92dce9c) )
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ROM_LOAD( "9snd.1i", 0xc000, 0x2000, CRC(3dab977f) SHA1(3e79c06d2e70b050f01b7ac58be5127ba87904b0) )
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ROM_REGION( 0x10000, "audio2", 0 ) /* 64k for second 6802 */
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ROM_LOAD( "8snd.1h", 0x2000, 0x1000, CRC(f4507111) SHA1(0513f0831b94aeda84aa4f3b4a7c60dfc5113b2d) )
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