First/programs/3d_renderer.asm

MOV $0xFF0000,%SP
#Set up vector mode
MOV $0xFFFC,%R4l
MOV $0x00FF,%R4h
MOV $0xFFFF,%R1l
MOV $0xFFFF,%R1h
MOV %R1,(%R4)
CALL $RENDER
MOV $>DATA_START,%R0l
MOV $<DATA_START,%R0h
MOV (%R0),%R1
MOV $0x3f4c,%R4h #0.8
MOV $0xcccd,%R4l
FADD %R4,%R1
MOV %R1,(%R0)
CALL $RENDER
MOV $>DATA_START,%R0l
MOV $<DATA_START,%R0h
MOV (%R0),%R1
MOV $0x3f4c,%R4h #0.8
MOV $0xcccd,%R4l
FADD %R4,%R1
MOV %R1,(%R0)
CALL $RENDER
HALT

:RENDER
MOV $>DATA_START,%R0l
MOV $<DATA_START,%R0h
MOV $0x000D,%R7l
MOV $0x0000,%R7h
MOV $0x0001,%R6l
MOV $0x0000,%R6h
MOV $0x0004,%R5l
MOV $0x0000,%R5h
MOV $0xFFFC,%R4l
MOV $0x00FF,%R4h
MOV $0x0002,%R1l
MOV $0x0000,%R1h #Clear the frame
MOV %R1,(%R4)
:RENDER_LOOP
MOV $0xFFFF,%R1l
MOV $0xFFFF,%R1h
MOV %R1,(%R4)
#Read in a point R1:x  R2:y  R3:z
MOV $0x3f4c,%R4h #0.8
MOV $0xcccd,%R4l
MOV (%R0),%R1
ADD %R5,%R0
MOV (%R0),%R2
ADD %R5,%R0
MOV (%R0),%R3
ADD %R5,%R0
FSUB %R4,%R1
FSUB %R4,%R2

MOV $0x3e99,%R4h
MOV $0x999a,%R4l
FADD %R4,%R3
FADD %R4,%R3
FADD %R4,%R1
FADD %R4,%R2
FDIV %R3,%R1
FDIV %R3,%R2
MOV $0xFFFC,%R4l
MOV $0x00FF,%R4h
MOV %R1,(%R4)
MOV %R2,(%R4)

MOV $0x3f4c,%R4h #0.8
MOV $0xcccd,%R4l
MOV (%R0),%R1
ADD %R5,%R0
MOV (%R0),%R2
ADD %R5,%R0
MOV (%R0),%R3
ADD %R5,%R0
FSUB %R4,%R1
FSUB %R4,%R2

MOV $0x3e99,%R4h
MOV $0x999a,%R4l
FADD %R4,%R3
FADD %R4,%R3
FADD %R4,%R1
FADD %R4,%R2
FDIV %R3,%R1
FDIV %R3,%R2
MOV $0xFFFC,%R4l
MOV $0x00FF,%R4h
MOV %R1,(%R4)
MOV %R2,(%R4)

SUB %R6,%R7
JMP,NZ $RENDER_LOOP
MOV $0x0003,%R1l
MOV $0x0000,%R1h #Display the frame
MOV %R1,(%R4)
RET



:DATA_START
#0,0,0
DDW $0x00000000
DDW $0x00000000
DDW $0x00000000

#0,0,1
DDW $0x00000000
DDW $0x00000000
DDW $0x3f800000



#0,0,0
DDW $0x00000000
DDW $0x00000000
DDW $0x00000000

#1,0,0
DDW $0x3f800000
DDW $0x00000000
DDW $0x00000000



#0,0,0
DDW $0x00000000
DDW $0x00000000
DDW $0x00000000

#0,1,0
DDW $0x00000000
DDW $0x3f800000
DDW $0x00000000



#1,1,1
DDW $0x3f800000
DDW $0x3f800000
DDW $0x3f800000

#1,1,0
DDW $0x3f800000
DDW $0x3f800000
DDW $0x00000000



#1,1,1
DDW $0x3f800000
DDW $0x3f800000
DDW $0x3f800000

#1,0,1
DDW $0x3f800000
DDW $0x00000000
DDW $0x3f800000



#1,1,1
DDW $0x3f800000
DDW $0x3f800000
DDW $0x3f800000

#0,1,1
DDW $0x00000000
DDW $0x3f800000
DDW $0x3f800000



#0,1,1
DDW $0x00000000
DDW $0x3f800000
DDW $0x3f800000

#0,1,0
DDW $0x00000000
DDW $0x3f800000
DDW $0x00000000



#0,1,1
DDW $0x00000000
DDW $0x3f800000
DDW $0x3f800000

#0,0,1
DDW $0x00000000
DDW $0x00000000
DDW $0x3f800000



#0,1,0
DDW $0x00000000
DDW $0x3f800000
DDW $0x00000000

#1,1,0
DDW $0x3f800000
DDW $0x3f800000
DDW $0x00000000



#0,1,0
DDW $0x00000000
DDW $0x3f800000
DDW $0x00000000

#1,1,0
DDW $0x3f800000
DDW $0x3f800000
DDW $0x00000000



#0,0,1
DDW $0x00000000
DDW $0x00000000
DDW $0x3f800000

#1,0,1
DDW $0x3f800000
DDW $0x00000000
DDW $0x3f800000



#1,0,0
DDW $0x3f800000
DDW $0x00000000
DDW $0x00000000

#1,1,0
DDW $0x3f800000
DDW $0x3f800000
DDW $0x00000000



#1,0,0
DDW $0x3f800000
DDW $0x00000000
DDW $0x00000000

#1,0,1
DDW $0x3f800000
DDW $0x00000000
DDW $0x3f800000