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3b2: Improved sim_load procedure

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The previous implementation of sim_load was riddled with little errors.
This change fixes those errors, improves user feedback, and limits the
allowable flags to '-r' and '-o'.
This commit is contained in:
Seth Morabito 2022-11-08 09:49:02 -08:00 • committed by Paul Koning
parent 3719b46524
commit f6cf886454
1 changed files with 17 additions and 14 deletions
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23
3B2/3b2_sys.c
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@ -68,21 +68,26 @@ t_stat sim_load(FILE *fileref, CONST char *cptr, CONST char *fnam, int flag)
int32 cnt = 0; int32 cnt = 0;
if (flag) { if (flag) {
return sim_messagef(SCPE_NOFNC, "Command not implemented."); return sim_messagef(SCPE_NOFNC, "Command not implemented.\n");
} }
if (sim_switches & SWMASK('R')) { if (sim_switches & SWMASK('R')) {
origin = ROM_BASE;
limit = ROM_BASE + ROM_SIZE; limit = ROM_BASE + ROM_SIZE;
} else { origin = ROM_BASE;
origin = 0; } else if (sim_switches & SWMASK('O')) {
limit = (uint32) cpu_unit.capac; limit = PHYS_MEM_BASE + (uint32) cpu_unit.capac;
if (sim_switches & SWMASK('O')) {
origin = (uint32) get_uint(cptr, 16, 0xffffffff, &r); origin = (uint32) get_uint(cptr, 16, 0xffffffff, &r);
if (r != SCPE_OK) { if (r != SCPE_OK) {
return SCPE_ARG; return SCPE_ARG;
} }
if (origin < PHYS_MEM_BASE) {
return sim_messagef(SCPE_ARG,
"Address not in RAM.\n");
} }
} else {
return sim_messagef(SCPE_ARG,
"Flag not understood. Use -r to load ROM "
"or -o to load RAM.\n");
} }
while ((i = Fgetc (fileref)) != EOF) { while ((i = Fgetc (fileref)) != EOF) {
@ -100,12 +105,10 @@ t_stat sim_load(FILE *fileref, CONST char *cptr, CONST char *fnam, int flag)
if (sim_switches & SWMASK('R')) { if (sim_switches & SWMASK('R')) {
rom_loaded = TRUE; rom_loaded = TRUE;
sim_messagef(SCPE_OK, "%d bytes loaded into ROM\n", cnt); return sim_messagef(SCPE_OK, "%d bytes loaded into ROM\n", cnt);
} else { } else {
sim_messagef(SCPE_OK, "%d bytes loaded at address 0x%08x\n", cnt, origin - cnt); return sim_messagef(SCPE_OK, "%d bytes loaded at address 0x%08x\n", cnt, origin - cnt);
} }
return SCPE_OK;
} }
t_stat parse_sym(CONST char *cptr, t_addr exta, UNIT *uptr, t_value *val, int32 sw) t_stat parse_sym(CONST char *cptr, t_addr exta, UNIT *uptr, t_value *val, int32 sw)