source: buchla-68k/ram/etloc.c@ 8c8b4e5

/*
   =============================================================================
        etloc.c -- location field handlers
        Version 11 -- 1988-07-13 -- D.N. Lynx Crowe
   =============================================================================
*/

#include "ram.h"

/*
   =============================================================================
        et_loc() -- load edit buffer
   =============================================================================
*/

int16_t et_loc(int16_t n)
{
        ebuf[0] =grploc[n] + 1 + '0';
        ebuf[1] = '\0';
        ebflag = TRUE;
        return(SUCCESS);
}

/*
   =============================================================================
        setloc() -- set location
   =============================================================================
*/

void setloc(int16_t grp, int16_t loc)
{
        int16_t g, i, val;
        volatile uint16_t *fpu;
        struct idfnhdr *fp;
        uint16_t fpmant, fpexp;
        int16_t oldsr;
        int16_t nop;

        grploc[grp] = loc;
        val = (loctab[loc] << 1) ^ 0x8000;
        g = grp + 1;

        fpmant = (((int32_t)curintp & 0x0000FFF0L) *
                  ((int32_t)timemlt & 0x0000FFFFL)) >> 15;

        fpexp = expbit[curintp & 0x000F];


        for (i = 0; i < 12; i++)
                if (g EQ vce2grp[i]) {

                        fp = &vbufs[i].idhfnc[4];
                        fpu = io_fpu + FPU_OFNC + (i << 8) + 0x0040;

                        oldsr = setsr(0x2200);

/* ++++++++++++++++++++++++++++ FPU interrupts disabled +++++++++++++++++++++ */

                        fp->idftmd ^= I_NVBITS;

                        *(fpu + (int32_t)FPU_TMNT) = fpmant;
                        ++nop;  ++nop;  ++nop;
                        *(fpu + (int32_t)FPU_TEXP) = fpexp;
                        ++nop;  ++nop;  ++nop;

                        if (fp->idftmd & I_VNSUBN)
                                *(fpu + (int32_t)FPU_TNV1) = val;
                        else
                                *(fpu + (int32_t)FPU_TNV0) = val;

                        ++nop;  ++nop;  ++nop;

                        *(fpu + (int32_t)FPU_TCTL) =
                                (fp->idftmd & (I_NRATIO | I_NVBITS)) | 0x0001;

                        setsr(oldsr);

/* ++++++++++++++++++++++++++++ Interrupts restored +++++++++++++++++++++++++ */

                }
}

/*
   =============================================================================
        ef_loc() -- parse edit buffer
   =============================================================================
*/

int16_t ef_loc(int16_t n)
{
        register int16_t ival;
        register struct s_entry *ep;

        ebuf[1] = '\0';
        ival = ebuf[0] - '0';
        ebflag = FALSE;

        if (ival EQ 0)
                return(FAILURE);

        --ival;

        setloc(n, ival);

        if (recsw AND grpstat[n] AND (2 EQ grpmode[n])) {

                if (E_NULL NE (ep = findev(p_cur, t_cur, EV_LOCN, n, -1))) {

                        ep->e_data2 = ival;

                } else if (E_NULL NE (ep = e_alc(E_SIZE2))) {

                        ep->e_type  = EV_LOCN;
                        ep->e_data1 = n;
                        ep->e_data2 = ival;
                        ep->e_time  = t_cur;
                        p_cur = e_ins(ep, ep_adj(p_cur, 0, t_cur))->e_fwd;
                        eh_ins(ep, EH_LOCN);
                        ctrsw = TRUE;
                        se_disp(ep, D_FWD, gdstbc, 1);
                        scupd();
                }
        }

        return(SUCCESS);
}

/*
   =============================================================================
        rd_loc() -- (re)display the field
   =============================================================================
*/

int16_t rd_loc(int16_t n)
{
        if (v_regs[5] & 0x0180)
                vbank(0);

        vputc(obj8, 4, 8+(n*5), (grploc[n] + 1 + '0'), SDW11ATR);

        return(SUCCESS);
}

/*
   =============================================================================
        ds_loc() -- display all location to group assignments
   =============================================================================
*/

void ds_loc(void)
{
        register int16_t i;

        for (i = 0; i < 12; i++)
                rd_loc(i);
}

/*
   =============================================================================
        nd_loc() -- data entry function
   =============================================================================
*/

int16_t nd_loc(int16_t n, int16_t k)
{
        (void)n;

        ebuf[0]  = k + '0';

        if (v_regs[5] & 0x0180)
                vbank(0);

        vputc(obj8, 4, stccol, k + '0', SDW11DEA);
        advscur();

        return(SUCCESS);
}