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| author | Kartik K. Agaram <vc@akkartik.com> | 2021-06-29 21:37:06 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2021-06-29 21:37:06 -0700 |
| commit | f25b8e6e4180e214eec4cbc14eafa79a843c5da2 (patch) | |
| tree | 710f1ce1dcc2fa84faa2a13cd732996b924636b4 | |
| parent | f9888786c387c0a4709915772e36a3f9bed2e06f (diff) | |
| download | mu-f25b8e6e4180e214eec4cbc14eafa79a843c5da2.tar.gz | |
poking at the broken timer interrupt handler again
| -rw-r--r-- | boot.subx | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/boot.subx b/boot.subx index 31d79d4f..35e15c11 100644 --- a/boot.subx +++ b/boot.subx @@ -302,7 +302,7 @@ idt_start: # https://wiki.osdev.org/index.php?title=Interrupts&oldid=25102#Default_PC_Interrupt_Vector_Assignment # entry 8: https://wiki.osdev.org/Programmable_Interval_Timer - timer-interrupt-handler/imm16 # target[0:16] + null-interrupt-handler/imm16 # target[0:16] 8/imm16 # segment selector (gdt_code) 00 # unused 8e # 1/p 00/dpl 0 1110/type/32-bit-interrupt-gate @@ -360,24 +360,6 @@ $null-interrupt-handler:epilogue: fb/enable-interrupts cf/return-from-interrupt -timer-interrupt-handler: - # prologue - # Don't disable interrupts; the timer has the highest priority anyway, - # and this interrupt triggers extremely frequently. - fa/disable-interrupts - 60/push-all-registers - 9c/push-flags - # acknowledge interrupt - b0/copy-to-al 0x20/imm8 - e6/write-al-into-port 0x20/imm8 - 31/xor %eax 0/r32/eax -$timer-interrupt-handler:epilogue: - # epilogue - 9d/pop-flags - 61/pop-all-registers - fb/enable-interrupts - cf/return-from-interrupt - keyboard-interrupt-handler: # prologue fa/disable-interrupts |