79 lines
1.2 KiB
Ruby
79 lines
1.2 KiB
Ruby
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# main.asm.rb
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$gp0 = 0x1F801810
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$gp1 = 0x1F801814
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jmp l_start
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nop
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label :hello_world
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string "ello wrld!\n"
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label :printf
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addiu r0, 0xa0, at # address of bios func
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jr at
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addiu r0, 0x3f, t1 # printf number
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label :draw_line
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# todo: draw line function, take args in a0 - a3
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# tood: implement shift left so we can use that
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lwi $gp0, t0
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lwi 0x40_ffffff, t1 # monochrome line, color ffffff
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sw t1, 0, t0
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# lwi st, t1 # line vert 1
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sw t1, 0, t0
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# lwi en, t1 # line vert 2
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sw t1, 0, t0
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label :start
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nop ; nop ; nop ; nop
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# THIS IS NEEDED
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lwi $gp1, t0
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lwi 0x03_00_00_00, t1 # display enable
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sw t1, 0, t0
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lwi $gp0, t0
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lwi 0xe1_000000 + 0b0_0_0_1_0_01_00_0_0000, t1
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sw t1, 0, t0
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# THIS IS NEEDED
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lwi 0xe4_000000 + (640) + (480 << 10), t1 # Drawing Area bottom right
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sw t1, 0, t0
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def line(st, en)
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lwi 0x40_ffffff, t1 # monochrome line, color ffffff
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sw t1, 0, t0
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lwi st, t1 # line vert 1
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sw t1, 0, t0
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lwi en, t1 # line vert 2
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sw t1, 0, t0
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end
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line 0x0010_0010, 0x0030_0030
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line 0x0030_0030, 0x0060_0000
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line 0x0060_000a, 0x00f0_0060
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lwi l_hello_world, a0
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jal l_printf
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addiu sp, -16, sp # delay slot
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addiu sp, 16, sp
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label :end_loop
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lwi l_end_loop, t9
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jr t9
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nop
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