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AltairZ80: Add sim_clock_precalibrate_commands

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Used to initialize SCP timers to prevent problems during simulator startup
when THROTTLE is being used.

/*
 * This sequence of instructions is a mix that mimics
 * a resonable instruction set that is a close estimate
 * to the calibrated result.
 */

static const char *cpu_clock_precalibrate_commands[] = {
    "-m 100 LXI H,200H",
    "-m 103 MVI B,0",
    "-m 105 DCR B",
    "-m 106 MOV M,B",
    "-m 107 INX H",
    "-m 108 JNZ 0105H",
    "-m 10B JMP 0100H",
    "PC 100",
    NULL};
This commit is contained in:
Patrick Linstruth 2023-02-26 20:31:21 -08:00 • committed by Paul Koning
parent 86b19c767b
commit 825a505083
1 changed files with 18 additions and 0 deletions
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18
AltairZ80/altairz80_cpu.c
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@ -6383,6 +6383,23 @@ static t_stat sim_instr_mmu (void) {
return reason;
}
/*
* This sequence of instructions is a mix that mimics
* a resonable instruction set that is a close estimate
* to the calibrated result.
*/
static const char *cpu_clock_precalibrate_commands[] = {
"-m 100 LXI H,200H",
"-m 103 MVI B,0",
"-m 105 DCR B",
"-m 106 MOV M,B",
"-m 107 INX H",
"-m 108 JNZ 0105H",
"-m 10B JMP 0100H",
"PC 100",
NULL};
/* reset routine */
static t_stat cpu_reset(DEVICE *dptr) {
@ -6400,6 +6417,7 @@ static t_stat cpu_reset(DEVICE *dptr) {
setBankSelect(0);
cpu8086reset();
m68k_cpu_reset();
sim_clock_precalibrate_commands = cpu_clock_precalibrate_commands;
sim_brk_types = (SWMASK('E') | SWMASK('I') | SWMASK('M'));
sim_brk_dflt = SWMASK('E');
for (i = 0; i < PCQ_SIZE; i++)