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59 lines
1.1 KiB
NASM
59 lines
1.1 KiB
NASM
; draw_spin.asm -- CONTROL payload: draw the same three boxes, then freeze.
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;
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; It proves the coordinates and the renderer mapping (the boxes appear in the
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; next dumped frame). It deliberately does NOT return, so the OS is dead from
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; this point. Compare with draw_box.asm, which returns and leaves the OS alive
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; and whose boxes are gone by the next dumped frame: the OS repaints.
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;
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; Linked at bit 01840000h by dwt/visual/build.sh.
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.text
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_start:
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setf 16, 0, 0
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setf 32, 0, 1
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movi 0FFFFh, a0, L
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; box A (50,50)
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movi 0400C832h, a2, L
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movi 32, a3, L
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movi 2, a4, L
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rowA:
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move a4, a5
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wordA:
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move a0, *a2+, 0
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dsjs a5, wordA
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addi 03E0h, a2
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dsjs a3, rowA
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; box B (250,400)
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movi 040640FAh, a2, L
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movi 32, a3, L
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movi 2, a4, L
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rowB:
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move a4, a5
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wordB:
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move a0, *a2+, 0
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dsjs a5, wordB
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addi 03E0h, a2
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dsjs a3, rowB
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; box C (930,750)
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movi 040BBBA2h, a2, L
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movi 32, a3, L
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movi 2, a4, L
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rowC:
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move a4, a5
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wordC:
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move a0, *a2+, 0
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dsjs a5, wordC
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addi 03E0h, a2
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dsjs a3, rowC
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movi 05B5Bh, a0, L
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move a0, @01850020h, 0 ; SPIN_MARK = 5B5B
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dint
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spin:
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nop
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jruc spin
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.end
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