static void dec_r( void )
{
UINT16 t;
UINT8 r;
IMMBYTE(r);
t = RM(r) - 1;
WM( r, t );
CLR_NZC;
SET_N8(t);
SET_Z8(t);
SET_C8(~t);
tms7000_icount -= 7;
}
static void decd_r( void )
{
UINT8 r;
PAIR t;
IMMBYTE(r);
t.w.h = 0;
t.w.l = RRF16(r);
t.d -= 1;
WRF16(r,t);
CLR_NZC;
SET_N8(t.b.h);
SET_Z8(t.b.h);
SET_C16(~(t.d));
tms7000_icount -= 11;
}
static void cmp_ib( void )
{
UINT16 t;
UINT8 i;
IMMBYTE(i);
t = RDB - i;
CLR_NZC;
SET_N8(t);
SET_Z8(t);
if( t==0 )
SETC;
else
SET_C8( ~t );
tms7000_icount -= 7;
}
static void cmp_rb( void )
{
UINT16 t;
UINT8 r;
IMMBYTE(r);
t = RDB - RM(r);
CLR_NZC;
SET_N8(t);
SET_Z8(t);
if( t==0 )
SETC;
else
SET_C8( ~t );
tms7000_icount -= 8;
}
static void xchb_r( void )
{
UINT16 t,u;
UINT8 r;
IMMBYTE(r);
t = RDB;
u = RM(r);
WRA(t);
WRB(u);
CLR_NZC;
SET_N8(t);
SET_Z8(t);
tms7000_icount -= 8;
}
static void rl_r( void )
{
UINT16 t;
UINT8 r;
IMMBYTE(r);
t = RM(r) << 1;
CLR_NZC;
SET_C8(t);
if( pSR & SR_C )
t |= 0x01;
SET_N8(t);
SET_Z8(t);
WM(r,t);
tms7000_icount -= 7;
}
static void dsb_i2b( void )
{
UINT8 i;
UINT16 t;
IMMBYTE(i);
t = bcd_sub( RDB, i );
if( !(pSR & SR_C) )
t = bcd_sub( t, 1 );
WRB(t);
CLR_NZC;
SET_C8(~t);
SET_N8(t);
SET_Z8(t);
tms7000_icount -= 9;
}
static void dsb_r2b( void )
{
UINT8 r;
UINT16 t;
IMMBYTE(r);
t = bcd_sub( RDB, RM(r) );
if( !(pSR & SR_C) )
t = bcd_sub( t, 1 );
WRB(t);
CLR_NZC;
SET_C8(~t);
SET_N8(t);
SET_Z8(t);
tms7000_icount -= 10;
}
static void dac_i2b( void )
{
UINT8 i;
UINT16 t;
IMMBYTE(i);
t = bcd_add( i, RDB );
if (pSR & SR_C)
t = bcd_add( t, 1 );
WRB(t);
CLR_NZC;
SET_C8(t);
SET_N8(t);
SET_Z8(t);
tms7000_icount -= 9;
}
static void dac_r2a( void )
{
UINT8 r;
UINT16 t;
IMMBYTE(r);
t = bcd_add( RDA, RM(r) );
if (pSR & SR_C)
t = bcd_add( t, 1 );
WRA(t);
CLR_NZC;
SET_C8(t);
SET_N8(t);
SET_Z8(t);
tms7000_icount -= 10;
}
static void cmpa_ind( void )
{
UINT16 t;
PAIR p;
INT8 i;
IMMBYTE(i);
p.w.l = RRF16(i);
t = RDA - RM(p.w.l);
CLR_NZC;
SET_N8(t);
SET_Z8(t);
if( t==0 )
SETC;
else
SET_C8( ~t );
tms7000_icount -= 11;
}
static void swap_r_exl( void )
{
UINT8 a,b,r;
UINT16 t;
IMMBYTE(r);
if (r == 0)
{ /* opcode D7 00 (LVDP) mostly equivalent to MOVP P46,A??? (timings must
be different, possibly the microcode polls the state of the VDP RDY
line prior to doing the transfer) */
t=RM(0x012e);
WRA(t);
CLR_NZC;
SET_N8(t);
SET_Z8(t);
tms7000_icount -= 9; /* ?????? */
}
else
{ /* stright swap Rn instruction */
a = b = RM(r);
a <<= 4;
b >>= 4;
t = a+b;
WM(r,t);
CLR_NZC;
pSR|=((t&0x0001)<<7);
SET_N8(t);
SET_Z8(t);
tms7000_icount -=8;
}
}
static void swap_r( void )
{
UINT8 a,b,r;
UINT16 t;
IMMBYTE(r);
a = b = RM(r);
a <<= 4;
b >>= 4;
t = a+b;
WM(r,t);
CLR_NZC;
pSR|=((t&0x0001)<<7);
SET_N8(t);
SET_Z8(t);
tms7000_icount -=8;
}
static void rlc_r( void )
{
UINT16 t;
UINT8 r;
int old_carry;
old_carry = (pSR & SR_C);
IMMBYTE(r);
t = RM(r) << 1;
CLR_NZC;
SET_C8(t);
if( old_carry )
t |= 0x01;
SET_N8(t);
SET_Z8(t);
WM(r,t);
tms7000_icount -= 7;
}
/* $ca ORB immediate -**0- */
INLINE void orb_im( void )
{
UINT8 t;
IMMBYTE(t); B |= t;
CLR_NZV; SET_NZ8(B);
}
/* $c5 BITB immediate -**0- */
INLINE void bitb_im( void )
{
UINT8 t,r;
IMMBYTE(t); r = B&t;
CLR_NZV; SET_NZ8(r);
}
/* $c6 LDB immediate -**0- */
INLINE void ldb_im( void )
{
IMMBYTE(B);
CLR_NZV; SET_NZ8(B);
}
/* $c1 CMPB immediate ?**** */
INLINE void cmpb_im( void )
{
UINT16 t,r;
IMMBYTE(t); r = B-t;
CLR_NZVC; SET_FLAGS8(B,t,r);
}
/* $c4 ANDB immediate -**0- */
INLINE void andb_im( void )
{
UINT8 t;
IMMBYTE(t); B &= t;
CLR_NZV; SET_NZ8(B);
}
/* $86 LDA immediate -**0- */
INLINE void lda_im( void )
{
IMMBYTE(A);
CLR_NZV; SET_NZ8(A);
}
/* $8a ORA immediate -**0- */
INLINE void ora_im( void )
{
UINT8 t;
IMMBYTE(t); A |= t;
CLR_NZV; SET_NZ8(A);
}
/* $84 ANDA immediate -**0- */
INLINE void anda_im( void )
{
UINT8 t;
IMMBYTE(t); A &= t;
CLR_NZV; SET_NZ8(A);
}
/* $81 CMPA immediate ?**** */
INLINE void cmpa_im( void )
{
UINT16 t,r;
IMMBYTE(t); r = A-t;
CLR_NZVC; SET_FLAGS8(A,t,r);
}
/* $c8 EORB immediate -**0- */
M6800_INLINE void eorb_im( void )
{
UINT8 t;
IMMBYTE(t); B ^= t;
CLR_NZV; SET_NZ8(B);
}
/* $21 BRN relative ----- */
INLINE void brn( void )
{
UINT8 t;
IMMBYTE(t);
}
/* $88 EORA immediate -**0- */
M6800_INLINE void eora_im( void )
{
UINT8 t;
IMMBYTE(t); A ^= t;
CLR_NZV; SET_NZ8(A);
}
INLINE void fetch_effective_address( void )
{
UINT8 postbyte = ROP_ARG(PCD);
PC++;
switch(postbyte)
{
case 0x00: EA=X; break;
case 0x01: EA=X+1; break;
case 0x02: EA=X+2; break;
case 0x03: EA=X+3; break;
case 0x04: EA=X+4; break;
case 0x05: EA=X+5; break;
case 0x06: EA=X+6; break;
case 0x07: EA=X+7; break;
case 0x08: EA=X+8; break;
case 0x09: EA=X+9; break;
case 0x0a: EA=X+10; break;
case 0x0b: EA=X+11; break;
case 0x0c: EA=X+12; break;
case 0x0d: EA=X+13; break;
case 0x0e: EA=X+14; break;
case 0x0f: EA=X+15; break;
case 0x10: EA=X-16; break;
case 0x11: EA=X-15; break;
case 0x12: EA=X-14; break;
case 0x13: EA=X-13; break;
case 0x14: EA=X-12; break;
case 0x15: EA=X-11; break;
case 0x16: EA=X-10; break;
case 0x17: EA=X-9; break;
case 0x18: EA=X-8; break;
case 0x19: EA=X-7; break;
case 0x1a: EA=X-6; break;
case 0x1b: EA=X-5; break;
case 0x1c: EA=X-4; break;
case 0x1d: EA=X-3; break;
case 0x1e: EA=X-2; break;
case 0x1f: EA=X-1; break;
case 0x20: EA=Y; break;
case 0x21: EA=Y+1; break;
case 0x22: EA=Y+2; break;
case 0x23: EA=Y+3; break;
case 0x24: EA=Y+4; break;
case 0x25: EA=Y+5; break;
case 0x26: EA=Y+6; break;
case 0x27: EA=Y+7; break;
case 0x28: EA=Y+8; break;
case 0x29: EA=Y+9; break;
case 0x2a: EA=Y+10; break;
case 0x2b: EA=Y+11; break;
case 0x2c: EA=Y+12; break;
case 0x2d: EA=Y+13; break;
case 0x2e: EA=Y+14; break;
case 0x2f: EA=Y+15; break;
case 0x30: EA=Y-16; break;
case 0x31: EA=Y-15; break;
case 0x32: EA=Y-14; break;
case 0x33: EA=Y-13; break;
case 0x34: EA=Y-12; break;
case 0x35: EA=Y-11; break;
case 0x36: EA=Y-10; break;
case 0x37: EA=Y-9; break;
case 0x38: EA=Y-8; break;
case 0x39: EA=Y-7; break;
case 0x3a: EA=Y-6; break;
case 0x3b: EA=Y-5; break;
case 0x3c: EA=Y-4; break;
case 0x3d: EA=Y-3; break;
case 0x3e: EA=Y-2; break;
case 0x3f: EA=Y-1; break;
case 0x40: EA=U; break;
case 0x41: EA=U+1; break;
case 0x42: EA=U+2; break;
case 0x43: EA=U+3; break;
case 0x44: EA=U+4; break;
case 0x45: EA=U+5; break;
case 0x46: EA=U+6; break;
case 0x47: EA=U+7; break;
case 0x48: EA=U+8; break;
case 0x49: EA=U+9; break;
case 0x4a: EA=U+10; break;
case 0x4b: EA=U+11; break;
case 0x4c: EA=U+12; break;
case 0x4d: EA=U+13; break;
case 0x4e: EA=U+14; break;
case 0x4f: EA=U+15; break;
case 0x50: EA=U-16; break;
case 0x51: EA=U-15; break;
case 0x52: EA=U-14; break;
case 0x53: EA=U-13; break;
case 0x54: EA=U-12; break;
case 0x55: EA=U-11; break;
case 0x56: EA=U-10; break;
case 0x57: EA=U-9; break;
case 0x58: EA=U-8; break;
case 0x59: EA=U-7; break;
case 0x5a: EA=U-6; break;
case 0x5b: EA=U-5; break;
case 0x5c: EA=U-4; break;
case 0x5d: EA=U-3; break;
case 0x5e: EA=U-2; break;
case 0x5f: EA=U-1; break;
case 0x60: EA=S; break;
case 0x61: EA=S+1; break;
case 0x62: EA=S+2; break;
case 0x63: EA=S+3; break;
case 0x64: EA=S+4; break;
case 0x65: EA=S+5; break;
case 0x66: EA=S+6; break;
case 0x67: EA=S+7; break;
case 0x68: EA=S+8; break;
case 0x69: EA=S+9; break;
case 0x6a: EA=S+10; break;
case 0x6b: EA=S+11; break;
case 0x6c: EA=S+12; break;
case 0x6d: EA=S+13; break;
case 0x6e: EA=S+14; break;
case 0x6f: EA=S+15; break;
case 0x70: EA=S-16; break;
case 0x71: EA=S-15; break;
case 0x72: EA=S-14; break;
case 0x73: EA=S-13; break;
case 0x74: EA=S-12; break;
case 0x75: EA=S-11; break;
case 0x76: EA=S-10; break;
case 0x77: EA=S-9; break;
case 0x78: EA=S-8; break;
case 0x79: EA=S-7; break;
case 0x7a: EA=S-6; break;
case 0x7b: EA=S-5; break;
case 0x7c: EA=S-4; break;
case 0x7d: EA=S-3; break;
case 0x7e: EA=S-2; break;
case 0x7f: EA=S-1; break;
case 0x80: EA=X; X++; break;
case 0x81: EA=X; X+=2; break;
case 0x82: X--; EA=X; break;
case 0x83: X-=2; EA=X; break;
case 0x84: EA=X; break;
case 0x85: EA=X+SIGNED(B); break;
case 0x86: EA=X+SIGNED(A); break;
case 0x87: EA=X+SIGNED(E); break;
case 0x88: IMMBYTE(EA); EA=X+SIGNED(EA); break;
case 0x89: IMMWORD(ea); EA+=X; break;
case 0x8a: EA=X+SIGNED(F); break;
case 0x8b: EA=X+D; break;
case 0x8c: IMMBYTE(EA); EA=PC+SIGNED(EA); break;
case 0x8d: IMMWORD(ea); EA+=PC; break;
case 0x8e: EA=X+W; break;
case 0x8f: EA=W; break;
case 0x90: EA=W; EAD=RM16(EAD); break;
case 0x91: EA=X; X+=2; EAD=RM16(EAD); break;
case 0x92: IIError(); break;
case 0x93: X-=2; EA=X; EAD=RM16(EAD); break;
case 0x94: EA=X; EAD=RM16(EAD); break;
case 0x95: EA=X+SIGNED(B); EAD=RM16(EAD); break;
case 0x96: EA=X+SIGNED(A); EAD=RM16(EAD); break;
case 0x97: EA=X+SIGNED(E); EAD=RM16(EAD); break;
case 0x98: IMMBYTE(EA); EA=X+SIGNED(EA); EAD=RM16(EAD); break;
case 0x99: IMMWORD(ea); EA+=X; EAD=RM16(EAD); break;
case 0x9a: EA=X+SIGNED(F); EAD=RM16(EAD); break;
case 0x9b: EA=X+D; EAD=RM16(EAD); break;
case 0x9c: IMMBYTE(EA); EA=PC+SIGNED(EA); EAD=RM16(EAD); break;
case 0x9d: IMMWORD(ea); EA+=PC; EAD=RM16(EAD); break;
case 0x9e: EA=X+W; EAD=RM16(EAD); break;
case 0x9f: IMMWORD(ea); EAD=RM16(EAD); break;
case 0xa0: EA=Y; Y++; break;
case 0xa1: EA=Y; Y+=2; break;
case 0xa2: Y--; EA=Y; break;
case 0xa3: Y-=2; EA=Y; break;
case 0xa4: EA=Y; break;
case 0xa5: EA=Y+SIGNED(B); break;
case 0xa6: EA=Y+SIGNED(A); break;
case 0xa7: EA=Y+SIGNED(E); break;
case 0xa8: IMMBYTE(EA); EA=Y+SIGNED(EA); break;
case 0xa9: IMMWORD(ea); EA+=Y; break;
case 0xaa: EA=Y+SIGNED(F); break;
case 0xab: EA=Y+D; break;
case 0xac: IMMBYTE(EA); EA=PC+SIGNED(EA); break;
case 0xad: IMMWORD(ea); EA+=PC; break;
case 0xae: EA=Y+W; break;
case 0xaf: IMMWORD(ea); EA+=W; break;
case 0xb0: IMMWORD(ea); EA+=W; EAD=RM16(EAD); break;
case 0xb1: EA=Y; Y+=2; EAD=RM16(EAD); break;
case 0xb2: IIError(); break;
case 0xb3: Y-=2; EA=Y; EAD=RM16(EAD); break;
case 0xb4: EA=Y; EAD=RM16(EAD); break;
case 0xb5: EA=Y+SIGNED(B); EAD=RM16(EAD); break;
case 0xb6: EA=Y+SIGNED(A); EAD=RM16(EAD); break;
case 0xb7: EA=Y+SIGNED(E); EAD=RM16(EAD); break;
case 0xb8: IMMBYTE(EA); EA=Y+SIGNED(EA); EAD=RM16(EAD); break;
case 0xb9: IMMWORD(ea); EA+=Y; EAD=RM16(EAD); break;
case 0xba: EA=Y+SIGNED(F); EAD=RM16(EAD); break;
case 0xbb: EA=Y+D; EAD=RM16(EAD); break;
case 0xbc: IMMBYTE(EA); EA=PC+SIGNED(EA); EAD=RM16(EAD); break;
case 0xbd: IMMWORD(ea); EA+=PC; EAD=RM16(EAD); break;
case 0xbe: EA=Y+W; EAD=RM16(EAD); break;
case 0xbf: IIError(); break;
case 0xc0: EA=U; U++; break;
case 0xc1: EA=U; U+=2; break;
case 0xc2: U--; EA=U; break;
case 0xc3: U-=2; EA=U; break;
case 0xc4: EA=U; break;
case 0xc5: EA=U+SIGNED(B); break;
case 0xc6: EA=U+SIGNED(A); break;
case 0xc7: EA=U+SIGNED(E); break;
case 0xc8: IMMBYTE(EA); EA=U+SIGNED(EA); break;
case 0xc9: IMMWORD(ea); EA+=U; break;
case 0xca: EA=U+SIGNED(F); break;
case 0xcb: EA=U+D; break;
case 0xcc: IMMBYTE(EA); EA=PC+SIGNED(EA); break;
case 0xcd: IMMWORD(ea); EA+=PC; break;
case 0xce: EA=U+W; break;
case 0xcf: EA=W; W+=2; break;
case 0xd0: EA=W; W+=2; EAD=RM16(EAD); break;
case 0xd1: EA=U; U+=2; EAD=RM16(EAD); break;
case 0xd2: IIError(); break;
case 0xd3: U-=2; EA=U; EAD=RM16(EAD); break;
case 0xd4: EA=U; EAD=RM16(EAD); break;
case 0xd5: EA=U+SIGNED(B); EAD=RM16(EAD); break;
case 0xd6: EA=U+SIGNED(A); EAD=RM16(EAD); break;
case 0xd7: EA=U+SIGNED(E); EAD=RM16(EAD); break;
case 0xd8: IMMBYTE(EA); EA=U+SIGNED(EA); EAD=RM16(EAD); break;
case 0xd9: IMMWORD(ea); EA+=U; EAD=RM16(EAD); break;
case 0xda: EA=U+SIGNED(F); EAD=RM16(EAD); break;
case 0xdb: EA=U+D; EAD=RM16(EAD); break;
case 0xdc: IMMBYTE(EA); EA=PC+SIGNED(EA); EAD=RM16(EAD); break;
case 0xdd: IMMWORD(ea); EA+=PC; EAD=RM16(EAD); break;
case 0xde: EA=U+W; EAD=RM16(EAD); break;
case 0xdf: IIError(); break;
case 0xe0: EA=S; S++; break;
case 0xe1: EA=S; S+=2; break;
case 0xe2: S--; EA=S; break;
case 0xe3: S-=2; EA=S; break;
case 0xe4: EA=S; break;
case 0xe5: EA=S+SIGNED(B); break;
case 0xe6: EA=S+SIGNED(A); break;
case 0xe7: EA=S+SIGNED(E); break;
case 0xe8: IMMBYTE(EA); EA=S+SIGNED(EA); break;
case 0xe9: IMMWORD(ea); EA+=S; break;
case 0xea: EA=S+SIGNED(F); break;
case 0xeb: EA=S+D; break;
case 0xec: IMMBYTE(EA); EA=PC+SIGNED(EA); break;
case 0xed: IMMWORD(ea); EA+=PC; break;
case 0xee: EA=S+W; break;
case 0xef: W-=2; EA=W; break;
case 0xf0: W-=2; EA=W; EAD=RM16(EAD); break;
case 0xf1: EA=S; S+=2; EAD=RM16(EAD); break;
case 0xf2: IIError(); break;
case 0xf3: S-=2; EA=S; EAD=RM16(EAD); break;
case 0xf4: EA=S; EAD=RM16(EAD); break;
case 0xf5: EA=S+SIGNED(B); EAD=RM16(EAD); break;
case 0xf6: EA=S+SIGNED(A); EAD=RM16(EAD); break;
case 0xf7: EA=S+SIGNED(E); EAD=RM16(EAD); break;
case 0xf8: IMMBYTE(EA); EA=S+SIGNED(EA); EAD=RM16(EAD); break;
case 0xf9: IMMWORD(ea); EA+=S; EAD=RM16(EAD); break;
case 0xfa: EA=S+SIGNED(F); EAD=RM16(EAD); break;
case 0xfb: EA=S+D; EAD=RM16(EAD); break;
case 0xfc: IMMBYTE(EA); EA=PC+SIGNED(EA); EAD=RM16(EAD); break;
case 0xfd: IMMWORD(ea); EA+=PC; EAD=RM16(EAD); break;
case 0xfe: EA=S+W; EAD=RM16(EAD); break;
case 0xff: IIError(); break;
}
hd6309_ICount -= index_cycle[postbyte];
}
/* $85 BITA immediate -**0- */
M6800_INLINE void bita_im( void )
{
UINT8 t,r;
IMMBYTE(t); r = A&t;
CLR_NZV; SET_NZ8(r);
}
