github.com/simh.simh
1
0
Fork 0
mirror of https://github.com/simh/simh.git synced 2026-01-28 04:48:05 +00:00
Code Releases Activity

Imlac: Set core memory size.

Browse Source 
This adds new modifiers to the CPU device: 4k, 8k, and 16k.
This commit is contained in:
Lars Brinkhoff
2025-06-02 10:15:41 +02:00
committed by Mark Pizzolato
parent a3777d6235
commit 1c792f8309
1 changed files with 14 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
imlac/imlac_cpu.c
View File

@@ -39,6 +39,9 @@
#define ROM_STTY 2
#define ROM_PTR 3
#define UNIT_V_MSIZE (UNIT_V_UF + 0)
#define UNIT_MSIZE (07 << UNIT_V_MSIZE)
/* CPU state. */
static uint16 PC;
static uint16 AC;
@@ -77,6 +80,7 @@ static t_stat cpu_show_hist (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
static t_stat cpu_ex (t_value *vptr, t_addr ea, UNIT *uptr, int32 sw);
static t_stat cpu_dep (t_value val, t_addr ea, UNIT *uptr, int32 sw);
static t_stat cpu_reset (DEVICE *dptr);
static t_stat cpu_set_size (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
static uint16 irq_iot (uint16, uint16);
static t_stat rom_set_type (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
static t_stat rom_show_type (FILE *st, UNIT *up, int32 v, CONST void *dp);
@@ -95,6 +99,9 @@ REG cpu_reg[] = {
};
static MTAB cpu_mod[] = {
{ UNIT_MSIZE, 1, "4K", "4K", &cpu_set_size },
{ UNIT_MSIZE, 2, "8K", "8K", &cpu_set_size },
{ UNIT_MSIZE, 4, "16K", "16K", &cpu_set_size },
{ MTAB_XTD|MTAB_VDV, 0, "IDLE", "IDLE", &sim_set_idle, &sim_show_idle },
{ MTAB_XTD|MTAB_VDV, 0, NULL, "NOIDLE", &sim_clr_idle, NULL },
{ MTAB_XTD|MTAB_VDV|MTAB_NMO|MTAB_SHP, 0, "HISTORY", "HISTORY",
@@ -693,3 +700,10 @@ cpu_set_switches (unsigned long p1, unsigned long p2)
{
DS = p1 & 0177777;
}
static t_stat cpu_set_size (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
{
cpu_unit.capac = (uint32)val * 4096;
memmask = cpu_unit.capac - 1;
return SCPE_OK;
}