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Merge pull request #424 from kazblox/patch-1

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i86 and cosmic.c fixes
This commit is contained in:
R. Belmont 2015-10-25 12:21:54 -04:00
commit 53c819e5e4
2 changed files with 9 additions and 7 deletions
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12
src/devices/cpu/i86/i86.c
View File

@ -1147,9 +1147,10 @@ bool i8086_common_cpu_device::common_op(UINT8 op)
CLK(POP_R16);
break;
// 8086 'invalid opcodes', as documented at http://www.os2museum.com/wp/?p=2147
// - 0x60 - 0x6f are an alias to 0x70 - 0x7f.
// 8086 'invalid opcodes', as documented at http://www.os2museum.com/wp/?p=2147 and tested on real hardware
// - 0x60 - 0x6f are aliases to 0x70 - 0x7f.
// - 0xc0, 0xc1, 0xc8, 0xc9 are also aliases where the CPU ignores BIT 1 (*).
// - 0xf1 is an alias to 0xf0.
//
// Instructions are used in the boot sector for some versions of
// MS-DOS (e.g. the DEC Rainbow-100 version of DOS 2.x)
@ -1692,7 +1693,7 @@ bool i8086_common_cpu_device::common_op(UINT8 op)
}
break;
case 0xc1: // 0xc1 is 0xc3 - see (*)
case 0xc1: // 0xc1 is 0xc3 - see (*)
case 0xc3: // i_ret
m_ip = POP();
CLK(RET_NEAR);
@ -1724,7 +1725,7 @@ bool i8086_common_cpu_device::common_op(UINT8 op)
CLKM(MOV_RI16,MOV_MI16);
break;
case 0xc8: // 0xc8 = 0xca - see (*)
case 0xc8: // 0xc8 = 0xca - see (*)
case 0xca: // i_retf_d16
{
UINT32 count = fetch_word();
@ -1735,7 +1736,7 @@ bool i8086_common_cpu_device::common_op(UINT8 op)
}
break;
case 0xc9: // 0xc9 = 0xcb - see (*)
case 0xc9: // 0xc9 = 0xcb - see (*)
case 0xcb: // i_retf
m_ip = POP();
m_sregs[CS] = POP();
@ -2017,6 +2018,7 @@ bool i8086_common_cpu_device::common_op(UINT8 op)
case 0xf0: // i_lock
case 0xf1: // 0xf1 is 0xf0; verified on custom hardware
logerror("%s: %06x: Warning - BUSLOCK\n", tag(), pc());
m_lock = true;
m_no_interrupt = 1;

4
src/mame/drivers/cosmic.c
View File

@ -978,7 +978,7 @@ MACHINE_RESET_MEMBER(cosmic_state,cosmicg)
static MACHINE_CONFIG_START( cosmic, cosmic_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", Z80,Z80_MASTER_CLOCK/6) /* 1.8026 MHz*/
MCFG_CPU_ADD("maincpu", Z80,Z80_MASTER_CLOCK/6) /* 1.8026 MHz */
MCFG_MACHINE_START_OVERRIDE(cosmic_state,cosmic)
MCFG_MACHINE_RESET_OVERRIDE(cosmic_state,cosmic)
@ -1099,7 +1099,7 @@ MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( magspot, cosmic )
/* basic machine hardware */
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_REPLACE("maincpu", Z80, Z80_MASTER_CLOCK/4) /* 2.704 MHz, verified via schematics */
MCFG_CPU_PROGRAM_MAP(magspot_map)
/* video hardware */