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69 lines
1.1 KiB
69 lines
1.1 KiB
/*[
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das.c
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LOCAL CHAR SccsID[]="@(#)das.c 1.5 02/09/94";
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DAS CPU functions.
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------------------
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]*/
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#include <insignia.h>
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#include <host_def.h>
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#include <xt.h>
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#include <c_main.h>
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#include <c_addr.h>
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#include <c_bsic.h>
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#include <c_prot.h>
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#include <c_seg.h>
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#include <c_stack.h>
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#include <c_xcptn.h>
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#include <c_reg.h>
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#include <das.h>
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/*
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=====================================================================
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EXTERNAL ROUTINES STARTS HERE.
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=====================================================================
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*/
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GLOBAL VOID
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DAS()
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{
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IU8 temp_al;
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temp_al = GET_AL();
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if ( (temp_al & 0xf) > 9 || GET_AF() )
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{
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temp_al -= 6;
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SET_AF(1);
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}
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if ( GET_AL() > 0x99 || GET_CF() )
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{
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temp_al -= 0x60;
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SET_CF(1);
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}
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else if ( temp_al > 0x9f )
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{
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SET_CF(1);
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}
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SET_AL(temp_al);
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/* set ZF,SF,PF according to result */
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SET_ZF(temp_al == 0);
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SET_SF((temp_al & BIT7_MASK) != 0);
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SET_PF(pf_table[temp_al]);
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/* Set undefined flag(s) */
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#ifdef SET_UNDEFINED_FLAG
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SET_OF(UNDEFINED_FLAG);
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#endif
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}
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