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PDP11, VAX: Support explicit deregistering of I/O space addresses

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This commit is contained in:
Mark Pizzolato 2018-09-10 06:04:50 -07:00
parent ac40e513cb
commit 0051082dc9
1 changed files with 8 additions and 6 deletions
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14
PDP11/pdp11_io_lib.c
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@ -381,7 +381,7 @@ for (i = 0; i < dibp->vnum; i++) { /* loop thru vec */
int_vec[ilvl][ibit] = vec;
}
}
/* Register I/O space address and check for conflicts */
/* Register(Deregister) I/O space address and check for conflicts */
for (i = 0; i < (int32) dibp->lnt; i = i + 2) { /* create entries */
idx = ((dibp->ba + i) & IOPAGEMASK) >> 1; /* index into disp */
if ((iodispR[idx] && dibp->rd && /* conflict? */
@ -411,11 +411,13 @@ for (i = 0; i < (int32) dibp->lnt; i = i + 2) { /* create entries */
"Device %s address conflict with %s at 0%o\n",
sim_dname (dptr), cdname, (int)dibp->ba);
}
if (dibp->rd) /* set rd dispatch */
iodispR[idx] = dibp->rd;
if (dibp->wr) /* set wr dispatch */
iodispW[idx] = dibp->wr;
iodibp[idx] = dibp; /* remember DIB */
if ((dibp->rd == NULL) && (dibp->wr == NULL) && (dibp->vnum == 0))
iodibp[idx] = NULL; /* deregister DIB */
else {
iodispR[idx] = dibp->rd; /* set rd dispatch */
iodispW[idx] = dibp->wr; /* set wr dispatch */
iodibp[idx] = dibp; /* remember DIB */
}
}
return SCPE_OK;
}