2021-06-08 12:25:17 +00:00
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;Reads a keypress and prints its BIOS keycode.
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2021-05-30 16:12:19 +00:00
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keycode:
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;Read a keypress
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mov ah, 0x0
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int 0x16
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;Store the keycode
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mov [.scan], ah
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mov [.ascii], al
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;Print the prefix
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mov si, .prefix
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call printstr
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;Convert the scancode to a hex string
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2021-06-10 15:16:14 +00:00
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mov al, [.scan]
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2021-05-30 16:12:19 +00:00
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mov di, .keycode
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2021-06-06 16:56:54 +00:00
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call byte2hex
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2021-05-30 16:12:19 +00:00
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;Convert the ascii value to a hex string
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2021-06-10 15:16:14 +00:00
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mov al, [.ascii]
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2021-05-30 16:12:19 +00:00
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mov di, .keycode
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add di, 0x2
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2021-06-06 16:56:54 +00:00
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call byte2hex
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2021-05-30 16:12:19 +00:00
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;Print the keycode
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mov si, .keycode
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call println
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ret
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2021-06-10 15:16:14 +00:00
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.prefix db "0x", 0x0
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2021-05-30 16:12:19 +00:00
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2021-06-10 15:16:14 +00:00
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.scan db 0x0
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.ascii db 0x0
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2021-05-30 16:12:19 +00:00
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2021-06-10 15:16:14 +00:00
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.keycode times 0x5 db 0x0
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