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PDP11: RP11: Interrupt on IE+RESET+GO #389

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Jun 17, 2024
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PDP11: RP11: Interrupt on IE+RESET+GO #389

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15 changes: 10 additions & 5 deletions PDP11/pdp11_rr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -522,7 +522,7 @@ just want to know where the CSR is located, so they auto-calculate the range.
The original RP11 had the following differences: it responded to the address
range 17776710 - 17776746: RPM3 was followed by 3 buffer registers RPB1-RPB3,
then 3 locations (42-46) were unused. RPCA was both the cylinder address in the
lower 8 bits <00:07> (read-write), and the selected unit current cylinder address
lower 8 bits <00:07> (read-write), and the Selected Unit current cylinder address
(a la SUCA in RP11-C) in the higher 8 bits <08:15> (read-only). Since only the
RP02 disk drives were supported, it only required 8 bits for cylinder addresses.
There was no separate SUCA register (the location was occupied by RPB1). The
Expand Down Expand Up @@ -623,7 +623,7 @@ static t_stat rr_wr (int32 data, int32 PA, int32 access)
rpds &= ~(data & RPDS_ATTN); /* clr attention bits */
if (!(rpds & RPDS_ATTN) && (rpcs & RPCS_AIE)
&& (!(rpcs & CSR_IE) || !(rpcs & CSR_DONE))) {
sim_debug(RRDEB_INT, &rr_dev, "rr_wr(ATT:CLR_INT)\n");
sim_debug(RRDEB_INT, &rr_dev, "rr_wr(ATTN:CLR_INT)\n");
CLR_INT(RR); /* clr int request */
}
}
Expand Down Expand Up @@ -715,7 +715,7 @@ static void rr_go (int16 func)
if (func == RPCS_RESET) { /* control reset? */
rpds = 0;
rper = 0;
rpcs = CSR_DONE;
rpcs = CSR_DONE | (rpcs & CSR_IE);
rpwc = 0;
rpba = 0;
rpca = 0;
Expand All @@ -729,8 +729,13 @@ static void rr_go (int16 func)
uptr->STATUS = 0;
uptr->FUNC = 0;
}
sim_debug(RRDEB_INT, &rr_dev, "rr_go(RESET:CLR_INT)\n");
CLR_INT(RR); /* clr int request */
if (rpcs & CSR_IE) {
sim_debug(RRDEB_INT, &rr_dev, "rr_go(RESET:SET_INT)\n");
SET_INT(RR); /* set int request */
} else {
sim_debug(RRDEB_INT, &rr_dev, "rr_go(RESET:CLR_INT)\n");
CLR_INT(RR); /* clr int request */
}
return;
}

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