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SDS: Allow specifying breakpoints as being in monitor, user or normal mode only

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Breakpoint logic now allows four execution-type breakpoints:
 -E  as before, break if PC equals address, unqualified by mode
 -M break if PC equals address and machine is in monitor mode
 -N break if PC equals address and machine is in normal (SDS 930) mode
 -U break if PC equals address and machine is in user mode
This commit is contained in:
Mark Emmer 2014-03-02 22:47:39 -06:00
parent 614fe87af4
commit 396e78cb26
3 changed files with 35 additions and 6 deletions
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31
SDS/sds_cpu.c
View file

@ -428,9 +428,31 @@ while (reason == 0) { /* loop until halted */
int_reqhi = api_findreq (); /* recalc int req */
}
else { /* normal instr */
if (sim_brk_summ && sim_brk_test (P, SWMASK ('E'))) { /* breakpoint? */
reason = STOP_IBKPT; /* stop simulation */
break;
if (sim_brk_summ) {
uint32 btyp = SWMASK ('E');
if (nml_mode)
btyp = SWMASK ('E') | SWMASK ('N');
else
btyp = usr_mode ? SWMASK ('E') | SWMASK ('U')
: SWMASK ('E') | SWMASK ('M');
btyp = sim_brk_test (P, btyp);
if (btyp) {
if (btyp & SWMASK ('E')) /* unqualified breakpoint? */
reason = STOP_IBKPT; /* stop simulation */
else switch (btyp) { /* qualified breakpoint */
case SWMASK ('M'): /* monitor mode */
reason = STOP_MBKPT; /* stop simulation */
break;
case SWMASK ('N'): /* normal (SDS 930) mode */
reason = STOP_NBKPT; /* stop simulation */
break;
case SWMASK ('U'): /* user mode */
reason = STOP_UBKPT; /* stop simulation */
break;
}
break;
}
}
reason = Read (save_P = P, &inst); /* get instr */
P = (P + 1) & VA_MASK; /* incr PC */
@ -1473,7 +1495,8 @@ pcq_r = find_reg ("PCQ", NULL, dptr);
if (pcq_r)
pcq_r->qptr = 0;
else return SCPE_IERR;
sim_brk_types = sim_brk_dflt = SWMASK ('E');
sim_brk_dflt = SWMASK ('E');
sim_brk_types = SWMASK ('E') | SWMASK ('M') | SWMASK ('N') | SWMASK ('U');
return SCPE_OK;
}

5
SDS/sds_defs.h
View file

@ -1,4 +1,4 @@
/* sds_defs.h: SDS 940 simulator definitions
/* sds_defs.h: SDS 940 simulator definitions
Copyright (c) 2001-2010, Robert M. Supnik
@ -52,6 +52,9 @@
#define STOP_RTCINS 12 /* rtc inst not MIN/SKR */
#define STOP_ILLVEC 13 /* zero vector */
#define STOP_CCT 14 /* runaway CCT */
#define STOP_MBKPT 15 /* monitor-mode breakpoint */
#define STOP_NBKPT 16 /* normal-mode breakpoint */
#define STOP_UBKPT 17 /* user-mode breakpoint */
/* Trap codes */

5
SDS/sds_sys.c
View file

@ -96,7 +96,10 @@ const char *sim_stop_messages[] = {
"Trap instruction not BRM",
"RTC instruction not MIN or SKR",
"Interrupt vector zero",
"Runaway carriage control tape"
"Runaway carriage control tape",
"Monitor-mode Breakpoint",
"Normal-mode Breakpoint",
"User-mode Breakpoint"
};
/* Character conversion tables */