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From: nuapete [mailto:nuapete@hotmail.com]

Browse Source 
Sent: Friday, May 30, 2008 5:46 AM
Subject: dealer ROM U04 bankswitch

Hello,

ROMs U01-U03 are checked with the same code in a loop.
There's a separate ROM check for banked U04 at Z80:30F3.
It looks like dealer/revenger uses ppi8255 to control bankswitching.

- Added bankswitch for ROM U04 and removed BAD_DUMP from u4.bin
This commit is contained in:
Pierpaolo Prazzoli 2008-05-31 09:43:10 +00:00
parent 5248a94bcb
commit 1ee19bd278
1 changed files with 24 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
src/mame/drivers/epos.c
View File

@ -33,9 +33,7 @@
#include "sound/ay8910.h"
#include "epos.h"
static int counter = 0;
static int counter;
static MACHINE_RESET( dealer );
static WRITE8_HANDLER( dealer_decrypt_rom )
@ -50,6 +48,8 @@ static WRITE8_HANDLER( dealer_decrypt_rom )
// logerror("PC %08x: ctr=%04x\n",activecpu_get_pc(),counter);
memory_set_bankptr(1, rom + 0x10000 * counter);
// is the 2nd bank changed by the counter or it always uses the 1st key?
}
@ -73,7 +73,8 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START( dealer_readmem, ADDRESS_SPACE_PROGRAM, 8 )
AM_RANGE(0x0000, 0x6fff) AM_READ(SMH_BANK1)
AM_RANGE(0x0000, 0x5fff) AM_READ(SMH_BANK1)
AM_RANGE(0x6000, 0x6fff) AM_READ(SMH_BANK2)
AM_RANGE(0x7000, 0xffff) AM_READ(SMH_RAM)
ADDRESS_MAP_END
@ -120,6 +121,17 @@ static ADDRESS_MAP_START( dealer_writeport, ADDRESS_SPACE_IO, 8 )
// AM_RANGE(0x40, 0x40) AM_WRITE(watchdog_reset_w)
ADDRESS_MAP_END
/*
ROMs U01-U03 are checked with the same code in a loop.
There's a separate ROM check for banked U04 at 30F3.
It looks like dealer/revenger uses ppi8255 to control bankswitching.
*/
static WRITE8_HANDLER( write_prtc )
{
UINT8 *rom = memory_region(REGION_CPU1);
memory_set_bankptr(2, rom + 0x6000 + (0x1000 * (data & 1)));
}
static const ppi8255_interface ppi8255_intf =
{
input_port_2_r, /* Port A read */
@ -127,7 +139,7 @@ static const ppi8255_interface ppi8255_intf =
NULL, /* Port C read */
NULL, /* Port A write */
NULL, /* Port B write */
NULL, /* Port C write */
write_prtc, /* Port C write */
};
/*************************************
@ -332,8 +344,8 @@ static INPUT_PORTS_START( dealer )
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_BUTTON4 )
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_BUTTON5 ) //play
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_BUTTON6 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_BUTTON7 ) //coin in
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_BUTTON8 )
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_COIN1 ) //coin in
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_SERVICE )
INPUT_PORTS_END
@ -520,7 +532,7 @@ ROM_START( dealer )
ROM_LOAD( "u1.bin", 0x0000, 0x2000, CRC(e06f3563) SHA1(0d58cd1f2e1ca89adb9c64d7dd520bb1f2d50f1a) )
ROM_LOAD( "u2.bin", 0x2000, 0x2000, CRC(726bbbd6) SHA1(3538f3d655899c2a0f984c43fb7545ea4be1b231) )
ROM_LOAD( "u3.bin", 0x4000, 0x2000, CRC(ab721455) SHA1(a477da0590e0431172baae972e765473e19dcbff) )
ROM_LOAD( "u4.bin", 0x6000, 0x2000, BAD_DUMP CRC(ddb903e4) SHA1(4c06a2048b1c6989c363b110a17c33180025b9c8) )
ROM_LOAD( "u4.bin", 0x6000, 0x2000, CRC(ddb903e4) SHA1(4c06a2048b1c6989c363b110a17c33180025b9c8) )
ROM_REGION( 0x0020, REGION_PROMS, 0 )
ROM_LOAD( "82s123.u66", 0x0000, 0x0020, NO_DUMP ) /* missing */
@ -559,7 +571,9 @@ ROM_END
static MACHINE_RESET( dealer )
{
counter = 0;
memory_set_bankptr(1, memory_region(REGION_CPU1));
memory_set_bankptr(2, ((UINT8*)memory_region(REGION_CPU1)) + 0x6000);
}
static DRIVER_INIT( dealer )
@ -616,5 +630,5 @@ GAME( 1983, theglob, suprglob, epos, suprglob, 0, ROT270, "Epos Corporat
GAME( 1983, theglob2, suprglob, epos, suprglob, 0, ROT270, "Epos Corporation", "The Glob (earlier)", 0 )
GAME( 1983, theglob3, suprglob, epos, suprglob, 0, ROT270, "Epos Corporation", "The Glob (set 3)", 0 )
GAME( 1984, igmo, 0, epos, igmo, 0, ROT270, "Epos Corporation", "IGMO", GAME_WRONG_COLORS )
GAME( 19??, dealer, 0, dealer, dealer, dealer, ROT270, "Epos Corporation", "The Dealer", GAME_NOT_WORKING)
GAME( 1984, revenger, 0, dealer, dealer, dealer, ROT270, "Epos Corporation", "Revenger", GAME_NOT_WORKING)
GAME( 1984, dealer, 0, dealer, dealer, dealer, ROT270, "Epos Corporation", "The Dealer", GAME_WRONG_COLORS )
GAME( 1984, revenger, 0, dealer, dealer, dealer, ROT270, "Epos Corporation", "Revenger", GAME_NOT_WORKING )