2019-07-19 00:00:00 +00:00
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/* https://github.com/cirosantilli/x86-bare-metal-examples#pit_sleep_ticks */
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2018-12-04 09:46:27 +00:00
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2015-11-11 12:12:40 +01:00
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#include "common.h"
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BEGIN
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STAGE2
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CLEAR
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PROTECTED_MODE
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IDT_SETUP_48_ISRS
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REMAP_PIC_32
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PIT_GENERATE_FREQUENCY
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PIT_SET_FREQ 1000
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sti
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loop:
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VGA_PRINT_STRING $message
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PIT_SLEEP_TICKS $500
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jmp loop
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IDT_48_ENTRIES
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PIT_SLEEP_TICKS_GLOBALS
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interrupt_handler:
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cmp PIT_ISR_NUMBER, 4(%esp)
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jne not_pit
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PIT_SLEEP_TICKS_HANDLER_UPDATE
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not_pit:
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ret
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message:
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.asciz "a"
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