x86-bare-metal-examples/pit.S

/* https://github.com/cirosantilli/x86-bare-metal-examples#pit */

#include "common.h"

BEGIN
    IVT_PIT_SETUP
    PIT_GENERATE_FREQUENCY
    PIT_SET_MIN_FREQ
    /* If we comment out sti, nothing happens, because the PIT interrupts are maskable. */
    sti
    jmp .
handler:
    cli
    PUTC $'a
    PUTC $'\n
    /* EOI: it will not fire again unless we reset it. */
    PIC_EOI
    sti
    iret
Fix example header links that were left empty 2019-07-19 00:00:00 +00:00			`/* https://github.com/cirosantilli/x86-bare-metal-examples#pit */`
link all examples to header 2018-12-04 09:46:27 +00:00
rtc 2015-09-29 23:55:54 +02:00			`#include "common.h"`
Bochs works, failed PIT and beep attempts 2015-09-30 19:03:23 +02:00
rtc 2015-09-29 23:55:54 +02:00			`BEGIN`
DRY out PIT and make one that fires only once, get nsectors from linker script 2015-11-09 12:15:15 +01:00			`IVT_PIT_SETUP`
Use the IDT handler stub 2015-11-10 20:43:08 +01:00			`PIT_GENERATE_FREQUENCY`
DRY out PIT and make one that fires only once, get nsectors from linker script 2015-11-09 12:15:15 +01:00			`PIT_SET_MIN_FREQ`
			`/* If we comment out sti, nothing happens, because the PIT interrupts are maskable. */`
bios_disk_load works 2015-10-04 19:59:15 +02:00			`sti`
PIT works! 2015-10-30 15:24:06 +01:00			`jmp .`
bios_disk_load works 2015-10-04 19:59:15 +02:00			`handler:`
PIT works! 2015-10-30 15:24:06 +01:00			`cli`
Uniformized macros: push save all registers, and use only GAS macros, no CPP 2015-10-21 15:55:27 +02:00			`PUTC $'a`
PIT works! 2015-10-30 15:24:06 +01:00			`PUTC $'\n`
			`/* EOI: it will not fire again unless we reset it. */`
DRY out PIT and make one that fires only once, get nsectors from linker script 2015-11-09 12:15:15 +01:00			`PIC_EOI`
PIT works! 2015-10-30 15:24:06 +01:00			`sti`
bios_disk_load works 2015-10-04 19:59:15 +02:00			`iret`