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CDP1802 cpu core:

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- improved register layout
- randomized register contents on initialization
This commit is contained in:
Curt Coder 2009-01-12 14:26:56 +00:00
parent de81d24aab
commit bd0d0269ff
1 changed files with 17 additions and 3 deletions
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20
src/emu/cpu/cdp1802/cdp1802.c
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@ -71,14 +71,14 @@ static const cpu_state_entry state_array[] =
{ {
CDP1802_STATE_ENTRY(GENPC, "%04X", fake_pc, 0xffff, CPUSTATE_NOSHOW | CPUSTATE_IMPORT | CPUSTATE_EXPORT) CDP1802_STATE_ENTRY(GENPC, "%04X", fake_pc, 0xffff, CPUSTATE_NOSHOW | CPUSTATE_IMPORT | CPUSTATE_EXPORT)
CDP1802_STATE_ENTRY(P, "%02X", p, 0xff, 0) CDP1802_STATE_ENTRY(P, "%01X", p, 0xf, 0)
CDP1802_STATE_ENTRY(X, "%02X", x, 0xff, 0) CDP1802_STATE_ENTRY(X, "%01X", x, 0xf, 0)
CDP1802_STATE_ENTRY(D, "%02X", d, 0xff, 0) CDP1802_STATE_ENTRY(D, "%02X", d, 0xff, 0)
CDP1802_STATE_ENTRY(B, "%02X", b, 0xff, 0) CDP1802_STATE_ENTRY(B, "%02X", b, 0xff, 0)
CDP1802_STATE_ENTRY(T, "%02X", t, 0xff, 0) CDP1802_STATE_ENTRY(T, "%02X", t, 0xff, 0)
CDP1802_STATE_ENTRY(N, "%01X", n, 0xf, 0)
CDP1802_STATE_ENTRY(I, "%01X", i, 0xf, 0) CDP1802_STATE_ENTRY(I, "%01X", i, 0xf, 0)
CDP1802_STATE_ENTRY(N, "%01X", n, 0xf, 0)
CDP1802_STATE_ENTRY(R0, "%04X", r[0], 0xffff, 0) CDP1802_STATE_ENTRY(R0, "%04X", r[0], 0xffff, 0)
CDP1802_STATE_ENTRY(R1, "%04X", r[1], 0xffff, 0) CDP1802_STATE_ENTRY(R1, "%04X", r[1], 0xffff, 0)
@ -941,6 +941,7 @@ static CPU_RESET( cdp1802 )
static CPU_INIT( cdp1802 ) static CPU_INIT( cdp1802 )
{ {
cdp1802_state *cpustate = device->token; cdp1802_state *cpustate = device->token;
int i;
cpustate->intf = (cdp1802_interface *) device->static_config; cpustate->intf = (cdp1802_interface *) device->static_config;
@ -957,6 +958,19 @@ static CPU_INIT( cdp1802 )
/* set initial values */ /* set initial values */
cpustate->p = mame_rand(device->machine) & 0x0f;
cpustate->x = mame_rand(device->machine) & 0x0f;
cpustate->d = mame_rand(device->machine);
cpustate->b = mame_rand(device->machine);
cpustate->t = mame_rand(device->machine);
cpustate->n = mame_rand(device->machine) & 0x0f;
cpustate->i = mame_rand(device->machine) & 0x0f;
for (i = 0; i < 16; i++)
{
cpustate->r[i] = mame_rand(device->machine);
}
cpustate->mode = CDP1802_MODE_RESET; cpustate->mode = CDP1802_MODE_RESET;
cpustate->prevmode = cpustate->mode; cpustate->prevmode = cpustate->mode;
cpustate->irq = CLEAR_LINE; cpustate->irq = CLEAR_LINE;