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jubilee.c: Switched to new TMS9980 implementation and tried to bring the

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driver in better shape. [Michael Zapf]
This commit is contained in:
Michael Zapf 2013-11-04 22:06:14 +00:00
parent 86fecdf47f
commit ff97022b21
1 changed files with 29 additions and 24 deletions
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53
src/mame/drivers/jubilee.c
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@ -82,16 +82,10 @@
*******************************************************************************/
#define MODERN 0
#define MASTER_CLOCK XTAL_8MHz /* guess */
#include "emu.h"
#if MODERN
#include "cpu/tms9900/tms9980a.h"
#else
#include "cpu/tms9900/tms9900l.h"
#endif
#include "video/mc6845.h"
@ -107,6 +101,7 @@ public:
tilemap_t *m_bg_tilemap;
DECLARE_WRITE8_MEMBER(jubileep_videoram_w);
DECLARE_READ8_MEMBER(unk_r);
DECLARE_WRITE8_MEMBER(unk_w);
TILE_GET_INFO_MEMBER(get_bg_tile_info);
virtual void video_start();
virtual void palette_init();
@ -161,13 +156,7 @@ void jubilee_state::palette_init()
INTERRUPT_GEN_MEMBER(jubilee_state::jubileep_interrupt)
{
/* doesn't seems to work properly. need to set level1 interrupts */
#if MODERN
m_maincpu->set_input_line(INT_9980A_LEVEL1, ASSERT_LINE);
m_maincpu->set_input_line(INT_9980A_LEVEL1, CLEAR_LINE);
#else
device.execute().set_input_line_and_vector(0, ASSERT_LINE, 3);//2=nmi 3,4,5,6
#endif
}
@ -191,17 +180,41 @@ ADDRESS_MAP_END
*/
/*
TODO: I/O lines handling. This is still work to be done; someone needs to
check the schematics. Here, we need to deliver some reasonable return values
instead of the 0. Returning a random number will create a nondeterministic
behavior at best.
*/
READ8_MEMBER(jubilee_state::unk_r)
{
return (machine().rand() & 0xff);
// return (machine().rand() & 0xff);
logerror("CRU read from address %04x\n", offset<<4);
return 0;
}
WRITE8_MEMBER(jubilee_state::unk_w)
{
// return (machine().rand() & 0xff);
logerror("CRU write to address %04x: %d\n", offset<<1, data & 1);
// In particular, the interrupt from above must be cleared. We assume that
// this is done by one of the output lines, and from the 32 lines that are
// set right after an interrupt is serviced, all are set to 0, and only one
// is set to one. Maybe this one clears the interrupt.
// TODO: Check the schematics.
if (((offset<<1)==0x0ce2)&&(data==1))
{
m_maincpu->set_input_line(INT_9980A_LEVEL1, CLEAR_LINE);
}
}
static ADDRESS_MAP_START( jubileep_cru_map, AS_IO, 8, jubilee_state )
// AM_RANGE(0x0000, 0xffff) AM_READ(unk_r)
AM_RANGE(0x0000, 0x01ff) AM_READ(unk_r)
AM_RANGE(0x0000, 0x0fff) AM_WRITE(unk_w)
// AM_RANGE(0x00, 0x00) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w)
// AM_RANGE(0x01, 0x01) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w)
AM_RANGE(0xc8, 0xc8) AM_READ(unk_r)
// AM_RANGE(0xc8, 0xc8) AM_READ(unk_r)
ADDRESS_MAP_END
/* I/O byte R/W
@ -418,7 +431,6 @@ static MC6845_INTERFACE( mc6845_intf )
NULL /* update address callback */
};
#if MODERN
static TMS9980A_CONFIG( cpuconf )
{
DEVCB_NULL,
@ -427,7 +439,6 @@ static TMS9980A_CONFIG( cpuconf )
DEVCB_NULL, // Hold acknowledge
DEVCB_NULL // DBIN
};
#endif
/*************************
* Machine Drivers *
@ -436,13 +447,7 @@ static TMS9980A_CONFIG( cpuconf )
static MACHINE_CONFIG_START( jubileep, jubilee_state )
/* basic machine hardware */
#if MODERN
MCFG_TMS99xx_ADD("maincpu", TMS9980A, MASTER_CLOCK/2, jubileep_map, jubileep_cru_map, cpuconf)
#else
MCFG_CPU_ADD("maincpu", TMS9980L, MASTER_CLOCK/2) /* guess */
MCFG_CPU_PROGRAM_MAP(jubileep_map)
MCFG_CPU_IO_MAP(jubileep_cru_map)
#endif
MCFG_CPU_VBLANK_INT_DRIVER("screen", jubilee_state, jubileep_interrupt)
/* video hardware */