Compuprint MDP40B Programmer Manual - Manual (Page 170)

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G G r r a a p p h h i i c c s s
ESC 1
9 pin Bit Image Mode. (Olivetti PR2, PR40+)
ASCII Code ESC 1 p m n
Hexadecimal Value 1B 31 p m n
Decimal Value 27 49 p m n
Sets the machine to print in 9 pin Bit Image Mode. The type of graphic print, 9 pin or
24 pin, is selected with the ESC ! G n command. The bits of parameter p identify the
print modes selected:
b8: = 0 fixed
b7: = 1 fixed
b6: = 0 fixed
b5: = 0 fixed
b4: = 0 fixed
b3: = 0 Print in positive
= 1 Print in negative
b2: = 0 parameter m does not follow
= 1 parameter m follows
b1: = 0 parameter n does not follow
= 1 parameter n follows
Printing in positive prints a dot when the bit received is equal to 1 and does not print
when it is equal to 0, while printing in negative does the exact opposite. The decimal
value of parameter m defines the length of the print line, expressed as a number of
dots.