75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
/* z80_ops.c: Process the next opcode
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Copyright (c) 1999-2005 Philip Kendall, Witold Filipczyk
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$Id: z80_ops.c 4624 2012-01-09 20:59:35Z pak21 $
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Author contact information:
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E-mail: philip-fuse@shadowmagic.org.uk
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*/
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#include "z80.h"
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#include "z80_macros.h"
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static int iline = 0;
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void z80_set_interrupt(int set)
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{
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iline = set;
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}
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int z80_do_opcode( void )
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{
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if(iline)
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{
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if(z80_interrupt())
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{
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int ret = z80_tstates - last_z80_tstates;
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last_z80_tstates = z80_tstates;
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return(ret);
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}
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}
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uint8 opcode;
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/* Check to see if M1 cycles happen on even z80_tstates */
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//if( z80_tstates & 1 )
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// z80_tstates++;
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//uint16 lastpc = PC;
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opcode = Z80_RB_MACRO( PC );
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//printf("Z80-op: %04x, %02x\n", PC, opcode);
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z80_tstates++;
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PC++;
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R++;
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switch(opcode)
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{
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#include "opcodes_base.c"
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}
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int ret = z80_tstates - last_z80_tstates;
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last_z80_tstates = z80_tstates;
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//printf("PC: %04x, %02x, time=%d\n", lastpc, opcode, ret);
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return(ret);
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}
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