The IBM 370 printer was used on the IBM 305 RAMAC computer system, introduced by IBM on September 14, 1956. The 370 was connected to the 305 by a serial data line from the S track of the computer's drum memory and printed 80-columns with a punched tape controlled carriage. Line formatting was programmed by inserting wire jumpers into a plugboard control panel.
The printer mechanism used an eight sided, seven position (56 character) print slug in a horizontal orientation. The X, O, and 2 bits of the character code rotate the slug and the 1, 4, and 8 bits selected the position. The platen hammer then struck the paper from behind, causing the selected character to print. Of the 56 characters on the print slug, only 47 were printable with the standard valid character set of the IBM 305 computer—the complete alphabet, numbers 0–9, and eleven special characters (48 characters, including the blank character).
Famous quotes containing the word printer:
“Although then a printer by trade, he listed himself in this early directory as an antiquarian. When he was asked the reason for this he replied that he always thought every town should have at least one antiquarian, and since none appeared for the post, he volunteered.”
—For the State of Iowa, U.S. public relief program (1935-1943)