R * &FFE0
S * &FFE3
 ORG 84
 LDAIM G-E
 TAY
O TAX
C LDAZX E-1
 BMI D
L JSR S
 INY
 BMI L
D TAY
 DEX
 BNE C
 STXZ W
 CPXZ H
 LDAIM 128+(F-E)
 ROLA
P ROLA
 TAX
 LDAZX G-((F-E)*4)
 JSR S
 TXA
 LSRA
 RORZ W
 INY
 BNE P
 LSRA
 RORZ H
 LSRZX W-((F-E)*4)-1
 BCC O
 JMP R
E = &ED,32,&F5,13
W
F = "/O\ ",&ED,13,&FA,4,22
G = " !-+"
H = 0
 END
