36 lines
699 B
NASM
36 lines
699 B
NASM
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; mouse cursor routines
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enable_cursor:
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push r0
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push r1
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push r31
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; write the cursor bitmap to the overlay framebuffer
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mov r0, CURSOR_FRAMEBUFFER_PTR
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mov r1, mouse_cursor
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mov r31, 96 ; 8x12
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enable_cursor_loop:
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mov [r0], [r1]
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add r0, 4
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add r1, 4
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loop enable_cursor_loop
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; set properties of overlay 31
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mov r0, 0x8000011F ; overlay 31: size
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mov.16 r1, CURSOR_HEIGHT
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sla r1, 16
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mov.16 r1, CURSOR_WIDTH
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out r0, r1
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mov r0, 0x8000021F ; overlay 31: framebuffer pointer
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mov r1, CURSOR_FRAMEBUFFER_PTR
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out r0, r1
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; enable overlay 31 (cursor)
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mov r0, 0x8000031F
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out r0, 1
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pop r31
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pop r1
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pop r0
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ret
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