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PIT: add alternative faster PIT

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This is enabled by default on 486+ CPUs and can be forced disabled/enabled with pit_mode=0/1
This commit is contained in:
Adrien Moulin
2022-07-23 13:38:10 +02:00
parent 23e082aeea
commit 2aa5d8f5b2
26 changed files with 968 additions and 108 deletions
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4
src/machine/m_xt_t1000.c
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@@ -911,7 +911,7 @@ machine_xt_t1000_init(const machine_t *model)
machine_common_init(model);
pit_ctr_set_out_func(&pit->counters[1], pit_refresh_timer_xt);
pit_devs[0].set_out_func(pit_devs[0].data, 1, pit_refresh_timer_xt);
device_add(&keyboard_xt_device);
t1000.fdc = device_add(&fdc_xt_device);
nmi_init();
@@ -979,7 +979,7 @@ machine_xt_t1200_init(const machine_t *model)
write_t1200_nvram, NULL, NULL,
NULL, MEM_MAPPING_EXTERNAL, &t1000);
pit_ctr_set_out_func(&pit->counters[1], pit_refresh_timer_xt);
pit_devs[0].set_out_func(pit_devs[0].data, 1, pit_refresh_timer_xt);
device_add(&keyboard_xt_device);
t1000.fdc = device_add(&fdc_xt_t1x00_device);
nmi_init();