mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 20:39:01 +00:00
145 lines
2.2 KiB
NASM
145 lines
2.2 KiB
NASM
DebugStub_ComAddr dd 0x03F8
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DebugStub_InitSerial:
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Mov DX, [DebugStub_ComAddr]
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Mov BX, DX
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Add DX, 1
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Mov AL, 0
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Out DX, AL
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Mov DX, BX
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Add DX, 3
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Mov AL, 0x80
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Out DX, AL
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Mov DX, BX
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Mov AL, 0x01
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Out DX, AL
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Mov DX, BX
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Add DX, 1
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Mov AL, 0x00
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Out DX, AL
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Mov DX, BX
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Add DX, 3
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Mov AL, 0x03
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Out DX, AL
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Mov DX, BX
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Add DX, 2
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Mov AL, 0xC7
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Out DX, AL
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Mov DX, BX
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Add DX, 4
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Mov AL, 0x03
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Out DX, AL
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DebugStub_InitSerial_Exit:
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Ret
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DebugStub_ComReadAL:
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Mov DX, [DebugStub_ComAddr]
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Add DX, 5
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DebugStub_ComReadAL_Wait:
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In AL, DX
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Test AL, 0x01
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JZ DebugStub_ComReadAL_Wait
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Mov DX, [DebugStub_ComAddr]
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In AL, DX
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DebugStub_ComReadAL_Exit:
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Ret
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DebugStub_ComReadEAX:
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Call DebugStub_ComReadAL
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ROR EAX, 8
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Call DebugStub_ComReadAL
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ROR EAX, 8
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Call DebugStub_ComReadAL
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ROR EAX, 8
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Call DebugStub_ComReadAL
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ROR EAX, 8
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DebugStub_ComReadEAX_Exit:
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Ret
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DebugStub_ComRead8:
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Call DebugStub_ComReadAL
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Mov [EDI + 0], AL
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Add EDI, 1
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DebugStub_ComRead8_Exit:
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Ret
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DebugStub_ComRead16:
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Call DebugStub_ComRead8
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Call DebugStub_ComRead8
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DebugStub_ComRead16_Exit:
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Ret
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DebugStub_ComRead32:
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Call DebugStub_ComRead8
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Call DebugStub_ComRead8
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Call DebugStub_ComRead8
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Call DebugStub_ComRead8
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DebugStub_ComRead32_Exit:
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Ret
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DebugStub_ComWriteAL:
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Push EAX
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Mov ESI, ESP
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Call DebugStub_ComWrite8
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Pop EAX
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DebugStub_ComWriteAL_Exit:
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Ret
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DebugStub_ComWriteAX:
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Push EAX
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Mov ESI, ESP
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Call DebugStub_ComWrite16
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Pop EAX
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DebugStub_ComWriteAX_Exit:
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Ret
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DebugStub_ComWriteEAX:
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Push EAX
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Mov ESI, ESP
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Call DebugStub_ComWrite32
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Pop EAX
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DebugStub_ComWriteEAX_Exit:
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Ret
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DebugStub_ComWrite8:
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Mov DX, [DebugStub_ComAddr]
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Add DX, 5
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DebugStub_ComWrite8_Wait:
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In AL, DX
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Test AL, 0x20
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JZ DebugStub_ComWrite8_Wait
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Mov DX, 0x03F8
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Mov AL, [ESI + 0]
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Out DX, AL
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Inc ESI
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DebugStub_ComWrite8_Exit:
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Ret
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DebugStub_ComWrite16:
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Call DebugStub_ComWrite8
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Call DebugStub_ComWrite8
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DebugStub_ComWrite16_Exit:
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Ret
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DebugStub_ComWrite32:
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Call DebugStub_ComWrite8
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Call DebugStub_ComWrite8
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Call DebugStub_ComWrite8
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Call DebugStub_ComWrite8
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DebugStub_ComWrite32_Exit:
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Ret
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DebugStub_ComWriteX:
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DebugStub_ComWriteX_More:
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Call DebugStub_ComWrite8
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Dec ECX
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JNZ DebugStub_ComWriteX_More
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DebugStub_ComWriteX_Exit:
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Ret
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