105 lines
2.3 KiB
Text
105 lines
2.3 KiB
Text
.load 0x2C00
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.fixed 1024, 0xFF
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.entry _kernel0_main
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.header KERNEL0_BOOT
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@include <sdk/bios_api.dss>
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@include <../drivers/display_driver.dss>
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@include <../drivers/keyboard_driver.dss>
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@include <memory.dss>
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## =========================================================================================================================
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.data
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$test_str "Hello DragonOS! :)"
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$cursor_x:1
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## =========================================================================================================================
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## =========================================================================================================================
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.code
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_kernel0_main:
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push DefaultPalette.Black
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push 1
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call $_clear_screen
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push $test_str
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push 1
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call $_print_string
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## debug_break
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_infinite_loop_0:
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## jmp $_infinite_loop_0
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mov [$cursor_x], 0
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## Init Memory Handler
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push 0
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call $_init_memory_handler
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## Init Display driver
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push 0
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call $_init_display_driver
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## Init Keyboard driver
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push $_key_pressed ## KeyPressed handler address passed to the _init_keyboard subroutine
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push 1
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call $_init_keyboard_driver
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_infinite_loop:
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jmp $_infinite_loop
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hlt
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## =========================================================================================================================
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## =========================================================================================================================
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_key_pressed:
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debug_break
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mov R1, [Keyboard_Registers.KEYCODE]
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mov ACC, KeyCodes.Return
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jeq $_key_pressed_enter, R1
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push R1
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push 1
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call $_is_char_printable
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mov ACC, RV
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jne $_key_pressed_end, 1
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push R1
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mov R2, [$cursor_x]
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push R2
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push 1
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push DefaultPalette.Red
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push 4
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call $_print_char
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inc R2
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mov [$cursor_x], R2
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jmp $_key_pressed_end
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_key_pressed_enter:
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mov [$cursor_x], 0
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mov R10, 0x25
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int 0x30
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jmp $_key_pressed_end
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_key_pressed_end:
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ret
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_is_char_printable:
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arg R9
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mov ACC, KeyCodes.Spacebar
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jls $_is_char_printable_false, R9
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mov ACC, KeyCodes.LowerCase_z
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jgr $_is_char_printable_false, R9
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mov RV, 1
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ret
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_is_char_printable_false:
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mov RV, 0
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ret
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## =========================================================================================================================
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