diff options
Diffstat (limited to 'mubios/arch')
| -rw-r--r-- | mubios/arch/irq.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/mubios/arch/irq.S b/mubios/arch/irq.S new file mode 100644 index 0000000..6eea350 --- /dev/null +++ b/mubios/arch/irq.S @@ -0,0 +1,51 @@ +# RCC-Project +# +# Copyright (C) 2026 Richard Qin +# +# This file is part of RCC-Project. +# +# RCC-Project is free software; you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free +# Software Foundation; either version 3 of the License, or (at your option) any +# later version. +# +# RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY +# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR +# A PARTICULAR PURPOSE. See the GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along with +# RCC-Project; see the file COPYING. If not see +# <http://www.gnu.org/licenses/>. + + .intel_syntax noprefix + .code16 + + .section .text16.irq, "ax" + + .global irq0_entry + .type irq0_entry, @function + +irq0_entry: + push ax + + # Acknowledge IRQ0 on the master PIC. + mov al, 0x20 + out 0x20, al + + pop ax + iret + + .global irq1_entry + .type irq1_entry, @function + +irq1_entry: + push ax + + # Read the PS/2 scan code before sending EOI. + in al, 0x60 + + mov al, 0x20 + out 0x20, al + + pop ax + iret |