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PDP11: Add default CPU BOOT to ROM if ROM is enabled and reasonably configured

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This commit is contained in:
Mark Pizzolato 2021-05-30 15:51:15 -07:00
parent cf1ac44d4a
commit 4ce23275e0
1 changed files with 42 additions and 1 deletions
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43
PDP11/pdp11_cpu.c
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@ -326,6 +326,7 @@ extern CPUTAB cpu_tab[];
t_stat cpu_ex (t_value *vptr, t_addr addr, UNIT *uptr, int32 sw);
t_stat cpu_dep (t_value val, t_addr addr, UNIT *uptr, int32 sw);
t_stat cpu_reset (DEVICE *dptr);
t_stat cpu_boot (int32 unitno, DEVICE *dptr);
t_bool cpu_is_pc_a_subroutine_call (t_addr **ret_addrs);
t_stat cpu_set_hist (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
t_stat cpu_show_hist (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
@ -681,7 +682,7 @@ DEVICE cpu_dev = {
"CPU", &cpu_unit, cpu_reg, cpu_mod,
1, 8, 22, 2, 8, 16,
&cpu_ex, &cpu_dep, &cpu_reset,
NULL, NULL, NULL,
&cpu_boot, NULL, NULL,
NULL, DEV_DYNM, 0,
NULL, &cpu_set_size, NULL,
NULL, NULL, NULL, NULL,
@ -3348,6 +3349,45 @@ static const char *pdp11_clock_precalibrate_commands[] = {
"PC 100",
NULL};
/* Special boot command - linked into SCP by initial reset
Syntax: BOOT {CPU}
*/
t_stat pdp11_boot (int32 flag, CONST char *ptr)
{
char gbuf[CBUFSIZE];
if ((ptr = get_sim_sw (ptr)) == NULL) /* get switches */
return SCPE_INVSW;
get_glyph (ptr, gbuf, 0); /* get glyph */
if (gbuf[0] && strcmp (gbuf, "CPU"))
return run_cmd (flag, gbuf); /* use specified device/unit */
return run_cmd (flag, "CPU");
}
/* Special boot command, overrides regular boot */
CTAB pdp11_cmd[] = {
{ "BOOT", &pdp11_boot, RU_BOOT,
"bo{ot} {unit} boot simulator\n", NULL, &run_cmd_message },
{ NULL }
};
t_stat cpu_boot (int32 unitno, DEVICE *dptr)
{
DEVICE *rom = find_dev ("ROM");
if ((rom == NULL) ||
((rom->flags & DEV_DIS) != 0) ||
(SCPE_NOFNC == rom->boot (unitno, rom)));
return SCPE_2FARG;
return SCPE_OK;
}
/* Reset routine */
t_stat cpu_reset (DEVICE *dptr)
@ -3384,6 +3424,7 @@ if (pcq_r)
else
return SCPE_IERR;
set_r_display (0, MD_KER);
sim_vm_cmd = pdp11_cmd;
return build_dib_tab (); /* build, chk dib_tab */
}