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This commit is contained in:
Angelo Salese 2015-01-23 21:23:52 +01:00
parent 03e3e64461
commit d3f4613afc
2 changed files with 48 additions and 4 deletions
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1
src/emu/drivers/xtal.h
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@ -57,6 +57,7 @@ enum
XTAL_2_5MHz = 2500000, /* Janken Man units */
XTAL_3MHz = 3000000, /* Probably only used to drive 68705 or similar MCUs on 80's Taito PCBs */
XTAL_3_12MHz = 3120000, /* SP0250 clock on Gottlieb games */
XTAL_3_5MHz = 3500000, /* Reported by Commodore 65 document, true xtal unchecked on PCB */
XTAL_3_52128MHz = 3521280, /* RCA COSMAC VIP */
XTAL_3_579545MHz = 3579545, /* NTSC color subcarrier, extremely common, used on 100's of PCBs (Keytronic custom part #48-300-010 is equivalent) */
XTAL_3_6864MHz = 3686400, /* CPS3 */

51
src/mess/drivers/c65.c
View File

@ -6,24 +6,33 @@ C=65 / C=64DX (c) 1991 Commodore
Attempt at rewriting the driver ...
Note:
- VIC-4567 will be eventually be added via compile switch, once that I
get the hang of the system (and checking where the old code fails
eventually)
***************************************************************************/
#include "emu.h"
#include "cpu/m6502/m4510.h"
#define MAIN_CLOCK XTAL_8MHz
#define MAIN_CLOCK XTAL_3_5MHz
class c65_state : public driver_device
{
public:
c65_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu")
m_maincpu(*this, "maincpu"),
m_screen(*this, "screen")
{ }
// devices
required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen;
DECLARE_READ8_MEMBER(vic4567_dummy_r);
DECLARE_WRITE8_MEMBER(vic4567_dummy_w);
// screen updates
UINT32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
@ -47,9 +56,43 @@ UINT32 c65_state::screen_update( screen_device &screen, bitmap_ind16 &bitmap, co
return 0;
}
READ8_MEMBER(c65_state::vic4567_dummy_r)
{
UINT8 res;
res=0xff;
switch(offset)
{
case 0x11:
res = (m_screen->vpos() & 0x100) >> 1;
return res;
case 0x12:
res = (m_screen->vpos() & 0xff);
return res;
}
printf("%02x\n",offset); // TODO: PC
return res;
}
WRITE8_MEMBER(c65_state::vic4567_dummy_w)
{
switch(offset)
{
/* KEY register, handles vic-iii and vic-ii modes via two consecutive writes
0xa5 -> 0x96 vic-iii mode
any other write vic-ii mode
*/
//case 0x2f: break;
default: printf("%02x %02x\n",offset,data); break;
}
}
static ADDRESS_MAP_START( c65_map, AS_PROGRAM, 8, c65_state )
AM_RANGE(0x00000, 0x01fff) AM_RAM // TODO: bank
AM_RANGE(0x0c800, 0x0cfff) AM_ROM AM_REGION("maincpu", 0xc800)
AM_RANGE(0x0d000, 0x0d07f) AM_READWRITE(vic4567_dummy_r,vic4567_dummy_w)
// 0x0d000, 0x0d07f VIC-4567
// 0x0d080, 0x0d09f FDC
// 0x0d0a0, 0x0d0ff Ram Expansion Control (REC)
@ -143,7 +186,7 @@ PALETTE_INIT_MEMBER(c65_state, c65)
static MACHINE_CONFIG_START( c65, c65_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu",M4510,MAIN_CLOCK/2)
MCFG_CPU_ADD("maincpu",M4510,MAIN_CLOCK)
MCFG_CPU_PROGRAM_MAP(c65_map)
/* video hardware */
@ -153,7 +196,7 @@ static MACHINE_CONFIG_START( c65, c65_state )
MCFG_SCREEN_UPDATE_DRIVER(c65_state, screen_update)
// MCFG_SCREEN_SIZE(32*8, 32*8)
// MCFG_SCREEN_VISIBLE_AREA(0*8, 32*8-1, 0*8, 32*8-1)
MCFG_SCREEN_RAW_PARAMS(MAIN_CLOCK/2, 442, 0, 320, 264, 0, 240) /* generic NTSC video timing, change accordingly */
MCFG_SCREEN_RAW_PARAMS(MAIN_CLOCK, 525, 0, 320, 525, 0, 240) // mods needed
MCFG_SCREEN_PALETTE("palette")
MCFG_PALETTE_ADD("palette", 0x100)