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Removing legacy code. (nw)

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This commit is contained in:
Michael Zapf 2014-02-27 14:32:37 +00:00
parent 18eaa848e9
commit eef8f45e9a
6 changed files with 474 additions and 620 deletions
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4
.gitattributes vendored
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@ -1525,14 +1525,10 @@ src/emu/cpu/tms7000/tms70op.c svneol=native#text/plain
src/emu/cpu/tms7000/tms70tb.c svneol=native#text/plain src/emu/cpu/tms7000/tms70tb.c svneol=native#text/plain
src/emu/cpu/tms9900/9900dasm.c svneol=native#text/plain src/emu/cpu/tms9900/9900dasm.c svneol=native#text/plain
src/emu/cpu/tms9900/99xxcore.h svneol=native#text/plain src/emu/cpu/tms9900/99xxcore.h svneol=native#text/plain
src/emu/cpu/tms9900/99xxstat.h svneol=native#text/plain
src/emu/cpu/tms9900/ti990_10.c svneol=native#text/plain src/emu/cpu/tms9900/ti990_10.c svneol=native#text/plain
src/emu/cpu/tms9900/ti990_10.h svneol=native#text/plain src/emu/cpu/tms9900/ti990_10.h svneol=native#text/plain
src/emu/cpu/tms9900/ti990_10l.c svneol=native#text/plain
src/emu/cpu/tms9900/tms9900.c svneol=native#text/plain src/emu/cpu/tms9900/tms9900.c svneol=native#text/plain
src/emu/cpu/tms9900/tms9900.h svneol=native#text/plain src/emu/cpu/tms9900/tms9900.h svneol=native#text/plain
src/emu/cpu/tms9900/tms9900l.c svneol=native#text/plain
src/emu/cpu/tms9900/tms9900l.h svneol=native#text/plain
src/emu/cpu/tms9900/tms9980a.c svneol=native#text/plain src/emu/cpu/tms9900/tms9980a.c svneol=native#text/plain
src/emu/cpu/tms9900/tms9980a.h svneol=native#text/plain src/emu/cpu/tms9900/tms9980a.h svneol=native#text/plain
src/emu/cpu/tms9900/tms9995.c svneol=native#text/plain src/emu/cpu/tms9900/tms9995.c svneol=native#text/plain

475
src/emu/cpu/tms9900/99xxcore.h
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@ -1230,7 +1230,480 @@ static void set_flag1(tms99xx_state *cpustate, int val);
/************************************************************************ /************************************************************************
* Status register functions * Status register functions
************************************************************************/ ************************************************************************/
#include "99xxstat.h"
/*
remember that the OP ST bit is maintained in cpustate->lastparity
*/
/*
setstat sets the ST_OP bit according to cpustate->lastparity
It must be called before reading the ST register.
*/
static void setstat(tms99xx_state *cpustate)
{
int i;
UINT8 a;
cpustate->STATUS &= ~ ST_OP;
/* We set the parity bit. */
a = cpustate->lastparity;
for (i=0; i<8; i++) /* 8 bits to test */
{
if (a & 1) /* If current bit is set */
cpustate->STATUS ^= ST_OP; /* we toggle the ST_OP bit */
a >>= 1; /* Next bit. */
}
}
/*
getstat sets emulator's cpustate->lastparity variable according to 9900's STATUS bits.
It must be called on interrupt return, or when, for some reason,
the emulated program sets the STATUS register directly.
*/
static void getstat(tms99xx_state *cpustate)
{
#if (USE_ST_MASK)
cpustate->STATUS &= ST_MASK; /* unused bits are forced to 0 */
#endif
if (cpustate->STATUS & ST_OP)
cpustate->lastparity = 1;
else
cpustate->lastparity = 0;
#if HAS_MAPPING
cpustate->cur_map = (cpustate->STATUS & ST_MF) ? 1 : 0;
#endif
}
/*
A few words about the following functions.
A big portability issue is the behavior of the ">>" instruction with the sign bit, which has
not been normalised. Every compiler does whatever it thinks smartest.
My code assumed that when shifting right signed numbers, the operand is left-filled with a
copy of sign bit, and that when shifting unsigned variables, it is left-filled with 0s.
This is probably the most logical behaviour, and it is the behavior of CW PRO3 - most time
(the exception is that ">>=" instructions always copy the sign bit (!)). But some compilers
are bound to disagree.
So, I had to create special functions with predefined tables included, so that this code work
on every compiler. BUT this is a real slow-down.
So, you might have to include a few lines in assembly to make this work better.
Sorry about this, this problem is really unpleasant and absurd, but it is not my fault.
*/
static const UINT16 right_shift_mask_table[17] =
{
0xFFFF,
0x7FFF,
0x3FFF,
0x1FFF,
0x0FFF,
0x07FF,
0x03FF,
0x01FF,
0x00FF,
0x007F,
0x003F,
0x001F,
0x000F,
0x0007,
0x0003,
0x0001,
0x0000
};
static const UINT16 inverted_right_shift_mask_table[17] =
{
0x0000,
0x8000,
0xC000,
0xE000,
0xF000,
0xF800,
0xFC00,
0xFE00,
0xFF00,
0xFF80,
0xFFC0,
0xFFE0,
0xFFF0,
0xFFF8,
0xFFFC,
0xFFFE,
0xFFFF
};
INLINE UINT16 logical_right_shift(UINT16 val, int c)
{
return((val>>c) & right_shift_mask_table[c]);
}
INLINE INT16 arithmetic_right_shift(INT16 val, int c)
{
if (val < 0)
return((val>>c) | inverted_right_shift_mask_table[c]);
else
return((val>>c) & right_shift_mask_table[c]);
}
/*
Set lae
*/
INLINE void setst_lae(tms99xx_state *cpustate, INT16 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ);
if (val > 0)
cpustate->STATUS |= (ST_LGT | ST_AGT);
else if (val < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
}
/*
Set laep (BYTE)
*/
INLINE void setst_byte_laep(tms99xx_state *cpustate, INT8 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ);
if (val > 0)
cpustate->STATUS |= (ST_LGT | ST_AGT);
else if (val < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
cpustate->lastparity = val;
}
/*
For COC, CZC, and TB
*/
INLINE void setst_e(tms99xx_state *cpustate, UINT16 val, UINT16 to)
{
if (val == to)
cpustate->STATUS |= ST_EQ;
else
cpustate->STATUS &= ~ ST_EQ;
}
/*
For CI, C, CB
*/
INLINE void setst_c_lae(tms99xx_state *cpustate, UINT16 to, UINT16 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ);
if (val == to)
cpustate->STATUS |= ST_EQ;
else
{
if ( ((INT16) val) > ((INT16) to) )
cpustate->STATUS |= ST_AGT;
if ( ((UINT16) val) > ((UINT16) to) )
cpustate->STATUS |= ST_LGT;
}
}
/*
Set laeco for add
*/
INLINE INT16 setst_add_laeco(tms99xx_state *cpustate, int a, int b)
{
UINT32 res;
INT16 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV);
res = (a & 0xffff) + (b & 0xffff);
if (res & 0x10000)
cpustate->STATUS |= ST_C;
if ((res ^ b) & (res ^ a) & 0x8000)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & b) | ((a | b) & ~ res)) & 0x0800)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT16) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return res2;
}
/*
Set laeco for subtract
*/
INLINE INT16 setst_sub_laeco(tms99xx_state *cpustate, int a, int b)
{
UINT32 res;
INT16 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV);
res = (a & 0xffff) - (b & 0xffff);
if (! (res & 0x10000))
cpustate->STATUS |= ST_C;
if ((a ^ b) & (a ^ res) & 0x8000)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & ~ b) | ((a | ~ b) & ~ res)) & 0x0800)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT16) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return res2;
}
/*
Set laecop for add (BYTE)
*/
INLINE INT8 setst_addbyte_laecop(tms99xx_state *cpustate, int a, int b)
{
unsigned int res;
INT8 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV | ST_OP);
res = (a & 0xff) + (b & 0xff);
if (res & 0x100)
cpustate->STATUS |= ST_C;
if ((res ^ b) & (res ^ a) & 0x80)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & b) | ((a | b) & ~ res)) & 0x08)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT8) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
cpustate->lastparity = res2;
return res2;
}
/*
Set laecop for subtract (BYTE)
*/
INLINE INT8 setst_subbyte_laecop(tms99xx_state *cpustate, int a, int b)
{
unsigned int res;
INT8 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV | ST_OP);
res = (a & 0xff) - (b & 0xff);
if (! (res & 0x100))
cpustate->STATUS |= ST_C;
if ((a ^ b) & (a ^ res) & 0x80)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & ~ b) | ((a | ~ b) & ~ res)) & 0x08)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT8) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
cpustate->lastparity = res2;
return res2;
}
/*
For NEG
*/
INLINE void setst_laeo(tms99xx_state *cpustate, INT16 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_OV);
if (val > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (val < 0)
{
cpustate->STATUS |= ST_LGT;
if (((UINT16) val) == 0x8000)
cpustate->STATUS |= ST_OV;
}
else
cpustate->STATUS |= ST_EQ;
}
/*
Meat of SRA
*/
INLINE UINT16 setst_sra_laec(tms99xx_state *cpustate, INT16 a, UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C);
if (c != 0)
{
a = arithmetic_right_shift(a, c-1);
if (a & 1) // The carry bit equals the last bit that is shifted out
cpustate->STATUS |= ST_C;
a = arithmetic_right_shift(a, 1);
}
if (a > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (a < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
/*
Meat of SRL. Same algorithm as SRA, except that we fills in with 0s.
*/
INLINE UINT16 setst_srl_laec(tms99xx_state *cpustate, UINT16 a,UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C);
if (c != 0)
{
a = logical_right_shift(a, c-1);
if (a & 1)
cpustate->STATUS |= ST_C;
a = logical_right_shift(a, 1);
}
if (((INT16) a) > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (((INT16) a) < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
//
// Meat of SRC
//
INLINE UINT16 setst_src_laec(tms99xx_state *cpustate, UINT16 a,UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C);
if (c != 0)
{
a = logical_right_shift(a, c) | (a << (16-c));
if (a & 0x8000) // The carry bit equals the last bit that is shifted out
cpustate->STATUS |= ST_C;
}
if (((INT16) a) > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (((INT16) a) < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
//
// Meat of SLA
//
INLINE UINT16 setst_sla_laeco(tms99xx_state *cpustate, UINT16 a, UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV);
if (c != 0)
{
{
register UINT16 mask;
register UINT16 ousted_bits;
mask = 0xFFFF << (16-c-1);
ousted_bits = a & mask;
if (ousted_bits) // If ousted_bits is neither all 0s
if (ousted_bits ^ mask) // nor all 1s,
cpustate->STATUS |= ST_OV; // we set overflow
}
a <<= c-1;
if (a & 0x8000) // The carry bit equals the last bit that is shifted out
cpustate->STATUS |= ST_C;
a <<= 1;
}
if (((INT16) a) > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (((INT16) a) < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
/**************************************************************************/ /**************************************************************************/

484
src/emu/cpu/tms9900/99xxstat.h
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@ -1,484 +0,0 @@
// license:MAME
// copyright-holders:Raphael Nabet
/************************************************************************
ST register functions
************************************************************************/
/*
remember that the OP ST bit is maintained in cpustate->lastparity
*/
/*
setstat sets the ST_OP bit according to cpustate->lastparity
It must be called before reading the ST register.
*/
static void setstat(tms99xx_state *cpustate)
{
int i;
UINT8 a;
cpustate->STATUS &= ~ ST_OP;
/* We set the parity bit. */
a = cpustate->lastparity;
for (i=0; i<8; i++) /* 8 bits to test */
{
if (a & 1) /* If current bit is set */
cpustate->STATUS ^= ST_OP; /* we toggle the ST_OP bit */
a >>= 1; /* Next bit. */
}
}
/*
getstat sets emulator's cpustate->lastparity variable according to 9900's STATUS bits.
It must be called on interrupt return, or when, for some reason,
the emulated program sets the STATUS register directly.
*/
static void getstat(tms99xx_state *cpustate)
{
#if (USE_ST_MASK)
cpustate->STATUS &= ST_MASK; /* unused bits are forced to 0 */
#endif
if (cpustate->STATUS & ST_OP)
cpustate->lastparity = 1;
else
cpustate->lastparity = 0;
#if HAS_MAPPING
cpustate->cur_map = (cpustate->STATUS & ST_MF) ? 1 : 0;
#endif
}
/*
A few words about the following functions.
A big portability issue is the behavior of the ">>" instruction with the sign bit, which has
not been normalised. Every compiler does whatever it thinks smartest.
My code assumed that when shifting right signed numbers, the operand is left-filled with a
copy of sign bit, and that when shifting unsigned variables, it is left-filled with 0s.
This is probably the most logical behaviour, and it is the behavior of CW PRO3 - most time
(the exception is that ">>=" instructions always copy the sign bit (!)). But some compilers
are bound to disagree.
So, I had to create special functions with predefined tables included, so that this code work
on every compiler. BUT this is a real slow-down.
So, you might have to include a few lines in assembly to make this work better.
Sorry about this, this problem is really unpleasant and absurd, but it is not my fault.
*/
static const UINT16 right_shift_mask_table[17] =
{
0xFFFF,
0x7FFF,
0x3FFF,
0x1FFF,
0x0FFF,
0x07FF,
0x03FF,
0x01FF,
0x00FF,
0x007F,
0x003F,
0x001F,
0x000F,
0x0007,
0x0003,
0x0001,
0x0000
};
static const UINT16 inverted_right_shift_mask_table[17] =
{
0x0000,
0x8000,
0xC000,
0xE000,
0xF000,
0xF800,
0xFC00,
0xFE00,
0xFF00,
0xFF80,
0xFFC0,
0xFFE0,
0xFFF0,
0xFFF8,
0xFFFC,
0xFFFE,
0xFFFF
};
INLINE UINT16 logical_right_shift(UINT16 val, int c)
{
return((val>>c) & right_shift_mask_table[c]);
}
INLINE INT16 arithmetic_right_shift(INT16 val, int c)
{
if (val < 0)
return((val>>c) | inverted_right_shift_mask_table[c]);
else
return((val>>c) & right_shift_mask_table[c]);
}
/*
Set lae
*/
INLINE void setst_lae(tms99xx_state *cpustate, INT16 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ);
if (val > 0)
cpustate->STATUS |= (ST_LGT | ST_AGT);
else if (val < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
}
/*
Set laep (BYTE)
*/
INLINE void setst_byte_laep(tms99xx_state *cpustate, INT8 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ);
if (val > 0)
cpustate->STATUS |= (ST_LGT | ST_AGT);
else if (val < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
cpustate->lastparity = val;
}
/*
For COC, CZC, and TB
*/
INLINE void setst_e(tms99xx_state *cpustate, UINT16 val, UINT16 to)
{
if (val == to)
cpustate->STATUS |= ST_EQ;
else
cpustate->STATUS &= ~ ST_EQ;
}
/*
For CI, C, CB
*/
INLINE void setst_c_lae(tms99xx_state *cpustate, UINT16 to, UINT16 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ);
if (val == to)
cpustate->STATUS |= ST_EQ;
else
{
if ( ((INT16) val) > ((INT16) to) )
cpustate->STATUS |= ST_AGT;
if ( ((UINT16) val) > ((UINT16) to) )
cpustate->STATUS |= ST_LGT;
}
}
/*
Set laeco for add
*/
INLINE INT16 setst_add_laeco(tms99xx_state *cpustate, int a, int b)
{
UINT32 res;
INT16 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV);
res = (a & 0xffff) + (b & 0xffff);
if (res & 0x10000)
cpustate->STATUS |= ST_C;
if ((res ^ b) & (res ^ a) & 0x8000)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & b) | ((a | b) & ~ res)) & 0x0800)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT16) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return res2;
}
/*
Set laeco for subtract
*/
INLINE INT16 setst_sub_laeco(tms99xx_state *cpustate, int a, int b)
{
UINT32 res;
INT16 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV);
res = (a & 0xffff) - (b & 0xffff);
if (! (res & 0x10000))
cpustate->STATUS |= ST_C;
if ((a ^ b) & (a ^ res) & 0x8000)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & ~ b) | ((a | ~ b) & ~ res)) & 0x0800)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT16) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return res2;
}
/*
Set laecop for add (BYTE)
*/
INLINE INT8 setst_addbyte_laecop(tms99xx_state *cpustate, int a, int b)
{
unsigned int res;
INT8 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV | ST_OP);
res = (a & 0xff) + (b & 0xff);
if (res & 0x100)
cpustate->STATUS |= ST_C;
if ((res ^ b) & (res ^ a) & 0x80)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & b) | ((a | b) & ~ res)) & 0x08)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT8) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
cpustate->lastparity = res2;
return res2;
}
/*
Set laecop for subtract (BYTE)
*/
INLINE INT8 setst_subbyte_laecop(tms99xx_state *cpustate, int a, int b)
{
unsigned int res;
INT8 res2;
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV | ST_OP);
res = (a & 0xff) - (b & 0xff);
if (! (res & 0x100))
cpustate->STATUS |= ST_C;
if ((a ^ b) & (a ^ res) & 0x80)
cpustate->STATUS |= ST_OV;
#if (TMS99XX_MODEL == TMS9940_ID) || (TMS99XX_MODEL == TMS9985_ID)
if (((a & ~ b) | ((a | ~ b) & ~ res)) & 0x08)
cpustate->STATUS |= ST_DC;
#endif
res2 = (INT8) res;
if (res2 > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (res2 < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
cpustate->lastparity = res2;
return res2;
}
/*
For NEG
*/
INLINE void setst_laeo(tms99xx_state *cpustate, INT16 val)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_OV);
if (val > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (val < 0)
{
cpustate->STATUS |= ST_LGT;
if (((UINT16) val) == 0x8000)
cpustate->STATUS |= ST_OV;
}
else
cpustate->STATUS |= ST_EQ;
}
/*
Meat of SRA
*/
INLINE UINT16 setst_sra_laec(tms99xx_state *cpustate, INT16 a, UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C);
if (c != 0)
{
a = arithmetic_right_shift(a, c-1);
if (a & 1) // The carry bit equals the last bit that is shifted out
cpustate->STATUS |= ST_C;
a = arithmetic_right_shift(a, 1);
}
if (a > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (a < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
/*
Meat of SRL. Same algorithm as SRA, except that we fills in with 0s.
*/
INLINE UINT16 setst_srl_laec(tms99xx_state *cpustate, UINT16 a,UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C);
if (c != 0)
{
a = logical_right_shift(a, c-1);
if (a & 1)
cpustate->STATUS |= ST_C;
a = logical_right_shift(a, 1);
}
if (((INT16) a) > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (((INT16) a) < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
//
// Meat of SRC
//
INLINE UINT16 setst_src_laec(tms99xx_state *cpustate, UINT16 a,UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C);
if (c != 0)
{
a = logical_right_shift(a, c) | (a << (16-c));
if (a & 0x8000) // The carry bit equals the last bit that is shifted out
cpustate->STATUS |= ST_C;
}
if (((INT16) a) > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (((INT16) a) < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
//
// Meat of SLA
//
INLINE UINT16 setst_sla_laeco(tms99xx_state *cpustate, UINT16 a, UINT16 c)
{
cpustate->STATUS &= ~ (ST_LGT | ST_AGT | ST_EQ | ST_C | ST_OV);
if (c != 0)
{
{
register UINT16 mask;
register UINT16 ousted_bits;
mask = 0xFFFF << (16-c-1);
ousted_bits = a & mask;
if (ousted_bits) // If ousted_bits is neither all 0s
if (ousted_bits ^ mask) // nor all 1s,
cpustate->STATUS |= ST_OV; // we set overflow
}
a <<= c-1;
if (a & 0x8000) // The carry bit equals the last bit that is shifted out
cpustate->STATUS |= ST_C;
a <<= 1;
}
if (((INT16) a) > 0)
cpustate->STATUS |= ST_LGT | ST_AGT;
else if (((INT16) a) < 0)
cpustate->STATUS |= ST_LGT;
else
cpustate->STATUS |= ST_EQ;
return a;
}
/***********************************************************************/

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src/emu/cpu/tms9900/ti990_10l.c
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@ -1,15 +0,0 @@
// license:MAME
// copyright-holders:Raphael Nabet
/*
Generate the tms9900 emulator
*/
#include "emu.h"
#include "debugger.h"
#include "tms9900l.h"
#define TMS99XX_MODEL TI990_10_ID
#include "99xxcore.h"
DEFINE_LEGACY_CPU_DEVICE(TI990_10L, ti990_10l);

17
src/emu/cpu/tms9900/tms9900l.c
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// license:MAME
// copyright-holders:Raphael Nabet
/*
This is the previous implementation of the TMS9900 using the common
core implementation in 99xxcore. The new cycle-precise implementation
can be found in tms9900.c
*/
#include "emu.h"
#include "debugger.h"
#include "tms9900l.h"
#define TMS99XX_MODEL TMS9900_ID
#include "99xxcore.h"
DEFINE_LEGACY_CPU_DEVICE(TMS9900L, tms9900l);

99
src/emu/cpu/tms9900/tms9900l.h
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// license:MAME
// copyright-holders:Raphael Nabet
/*
tms9900.h
C Header file for TMS9900 core
*/
#pragma once
#ifndef __TMS9900_H__
#define __TMS9900_H__
/*#define TI990_9_ID 0*//* early implementation, used in a few real-world applications, 1974 */
/* very similar to mapper-less 990/10 and tms9900, but the Load process */
/* is different */
/* ("ti990/9" is likely to be a nickname) */
#define TI990_10_ID 1 /* original multi-chip implementation for minicomputer systems, 1975 */
/*#define TI990_12_ID 2*//* multi-chip implementation, faster than 990/10. huge instruction set */
/* (144 instructions, with up to 16 additional custom instructions simulteanously) */
/* 1979 (or before) */
#define TMS9900_ID 3 /* mono-chip implementation, 1976 */
#define TMS9940_ID 4 /* microcontroller with 2kb ROM, 128b RAM, decrementer, CRU bus, 1979 */
#define TMS9980_ID 5 /* 8-bit variant of tms9900. Two distinct chips actually : tms9980a, */
/* and tms9981 with an extra clock and simplified power supply */
#define TMS9985_ID 6 /* 9940 with 8kb ROM, 256b RAM, and a 8-bit external bus, c. 1978 (never released) */
#define TMS9989_ID 7 /* improved 9980, used in bombs, missiles, and other *nice* hardware */
/*#define SBP68689_ID 8*//* improved 9989, built as an ASIC as 9989 was running scarce */
#define TMS9995_ID 9 /* tms9985-like, with many improvements (but no ROM) */
#define TMS99000_ID 10/* improved mono-chip implementation, meant to replace 990/10, 1981 */
/* This chip is available in several variants (tms99105, tms99110...), */
/* which are similar but emulate additional instructions thanks */
/* to the so-called macrostore feature. */
#define TMS99105A_ID 11
#define TMS99110A_ID 12
/* NPW 25-May-2002 - Added these to get it to compile under windows */
#define TI9940_ID TMS9940_ID
#define TI9985_ID TMS9985_ID
enum
{
TMS9900_PC=1, TMS9900_WP, TMS9900_STATUS, TMS9900_IR,
TMS9900_R0, TMS9900_R1, TMS9900_R2, TMS9900_R3,
TMS9900_R4, TMS9900_R5, TMS9900_R6, TMS9900_R7,
TMS9900_R8, TMS9900_R9, TMS9900_R10, TMS9900_R11,
TMS9900_R12, TMS9900_R13, TMS9900_R14, TMS9900_R15
};
typedef void (*ti99xx_idle_func)(device_t *device, int state);
typedef void (*ti99xx_rset_func)(device_t *device);
typedef void (*ti99xx_lrex_func)(device_t *device);
typedef void (*ti99xx_ckon_ckof_func)(device_t *device, int state);
typedef void (*ti99xx_error_interrupt_func)(device_t *device, int state);
DECLARE_LEGACY_CPU_DEVICE(TI990_10L, ti990_10l);
/*
structure with the parameters ti990_10_reset wants.
*/
struct ti990_10reset_param
{
ti99xx_idle_func idle_callback;
ti99xx_rset_func rset_callback;
ti99xx_lrex_func lrex_callback;
ti99xx_ckon_ckof_func ckon_ckof_callback;
ti99xx_error_interrupt_func error_interrupt_callback;
};
/* accessor for the internal ROM */
extern DECLARE_READ16_HANDLER(ti990_10_internal_r);
/* CRU accessor for the mapper registers (R12 base 0x1fa0) */
extern DECLARE_READ8_HANDLER(ti990_10_mapper_cru_r);
extern DECLARE_WRITE8_HANDLER(ti990_10_mapper_cru_w);
/* CRU accessor for the error interrupt register (R12 base 0x1fc0) */
extern DECLARE_READ8_HANDLER(ti990_10_eir_cru_r);
extern DECLARE_WRITE8_HANDLER(ti990_10_eir_cru_w);
DECLARE_LEGACY_CPU_DEVICE(TMS9900L, tms9900l);
/*
structure with optional parameters for tms9900_reset.
*/
struct tms9900reset_param
{
ti99xx_idle_func idle_callback;
};
#endif /* __TMS9900_H__ */