ASM source of that line draw demo [$6A]

More about ASM source of that line draw demo [$6A]

Runs only on DOS, using DEBUG
DEBUG DRAWLOOP.COM
RCX
0100
A100
MOV BX,0020
PUSH BX
CALL 0173
CALL 0116
POP BX
ADD BX,10
CMP BX,0100
JB 0103
JMP 017D
0116: PUSH CX
PUSH DX
CMP SP,8000
JA 0120
INT 20
0120: MOV AX,BX
ADD AX,BP
SHR AX,1
MOV CX,AX
MOV AX,SI
ADD AX,DI
SHR AX,1
MOV DX,AX
PUSH BX
MOV BX,0000
MOV AX,SP
MOV AH,0C
OR AL,01
INT 10
POP BX
CMP BX,CX
JNZ 0145
CMP DI,DX
JZ 150
0145: PUSH BP
PUSH DI
MOV BP,CX
MOV DI,DX
CALL 0116
POP DI
POP BP
0150: CMP BX,CX
JNZ 0150
CMP SI,DX
JZ 0163
0150: PUSH BX
PUSH SI
MOV BX,CX
MOV SI,DX
CALL 0116
POP SI
POP BX
NOP
POP DX
POP CX
RET
0173: MOV BP,0090
MOV SI,0020
MOV DI,0090
RET
017D: INT 20

W
Q
VIDMODE 4
DRAWLOOP
Don't try this under Windows :)