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Diffstat (limited to 'src/mame/drivers/zn.c')
-rw-r--r--src/mame/drivers/zn.c46
1 files changed, 44 insertions, 2 deletions
diff --git a/src/mame/drivers/zn.c b/src/mame/drivers/zn.c
index af0ac51738c..3c0a1103d1a 100644
--- a/src/mame/drivers/zn.c
+++ b/src/mame/drivers/zn.c
@@ -83,6 +83,7 @@ public:
DECLARE_READ16_MEMBER(bam2_unk_r);
DECLARE_WRITE16_MEMBER(acpsx_00_w);
DECLARE_WRITE16_MEMBER(acpsx_10_w);
+ DECLARE_WRITE16_MEMBER(nbajamex_bank_w);
DECLARE_WRITE16_MEMBER(nbajamex_80_w);
DECLARE_READ16_MEMBER(nbajamex_08_r);
DECLARE_READ16_MEMBER(nbajamex_80_r);
@@ -2034,17 +2035,55 @@ WRITE16_MEMBER(zn_state::acpsx_00_w)
verboselog(0, "acpsx_00_w( %08x, %08x, %08x )\n", offset, data, mem_mask );
}
+WRITE16_MEMBER(zn_state::nbajamex_bank_w)
+{
+ UINT32 newbank = 0;
+
+ verboselog(0, "nbajamex_bank_w( %08x, %08x, %08x )\n", offset, data, mem_mask );
+
+ if (offset > 1)
+ {
+ logerror("Unknown banking offset %x!\n", offset);
+ }
+
+ if (offset == 1)
+ {
+ data -= 1;
+ }
+
+ if (data <= 1)
+ {
+ newbank = (data * 0x400000);
+ }
+ else if (data >= 0x10)
+ {
+ data -= 0x10;
+ newbank = (data * 0x400000);
+ newbank += 0x200000;
+ }
+
+ if (offset == 0)
+ {
+ membank( "bankedroms" )->set_base( memregion( "bankedroms" )->base() + newbank);
+ }
+ else if (offset == 1)
+ {
+ newbank += 0x200000;
+ membank( "bankedroms2" )->set_base( memregion( "bankedroms" )->base() + newbank);
+ }
+}
+
WRITE16_MEMBER(zn_state::acpsx_10_w)
{
verboselog(0, "acpsx_10_w( %08x, %08x, %08x )\n", offset, data, mem_mask );
}
+// all 16 bits goes to the external soundboard's latch (see sound test menu)
WRITE16_MEMBER(zn_state::nbajamex_80_w)
{
verboselog(0, "nbajamex_80_w( %08x, %08x, %08x )\n", offset, data, mem_mask );
psxirq_device *psxirq = (psxirq_device *) machine().device("maincpu:irq");
psxirq->intin10(1);
- membank( "bankedroms" )->set_base( memregion( "bankedroms" )->base() + (data ? 0xe00000 : 0));
}
READ16_MEMBER(zn_state::nbajamex_08_r)
@@ -2054,6 +2093,7 @@ READ16_MEMBER(zn_state::nbajamex_08_r)
return data;
}
+// possibly a readback from the external soundboard?
READ16_MEMBER(zn_state::nbajamex_80_r)
{
UINT32 data = 0xffffffff;
@@ -2070,7 +2110,8 @@ ADDRESS_MAP_END
static ADDRESS_MAP_START(nbajamex_map, AS_PROGRAM, 32, zn_state)
AM_RANGE(0x1f000000, 0x1f1fffff) AM_ROMBANK("bankedroms")
- AM_RANGE(0x1f200000, 0x1f207fff) AM_RAM AM_SHARE("eeprom")
+ AM_RANGE(0x1f200000, 0x1f7fffff) AM_ROMBANK("bankedroms2")
+ AM_RANGE(0x1fbfff00, 0x1fbfff07) AM_WRITE16(nbajamex_bank_w, 0xffffffff)
AM_RANGE(0x1fbfff08, 0x1fbfff0b) AM_READ16(nbajamex_08_r, 0xffff)
AM_RANGE(0x1fbfff80, 0x1fbfff83) AM_READWRITE16(nbajamex_80_r, nbajamex_80_w, 0xffff)
@@ -2080,6 +2121,7 @@ ADDRESS_MAP_END
MACHINE_RESET_MEMBER(zn_state,nbajamex)
{
membank( "bankedroms" )->set_base( memregion( "bankedroms" )->base() );
+ membank( "bankedroms2" )->set_base( memregion( "bankedroms" )->base() + 0x200000 );
}
static ADDRESS_MAP_START(jdredd_map, AS_PROGRAM, 32, zn_state)