IBM System/7 Functional Characteristics - All about the IBM 1130 ...

IMP P 1111,1111.11,11311111 I MP 111111111111111111111111P 1111111111111111, RUPPLINE PRINTERThe printer operates at 6 lines per inch at 40, 80, 120, or 155 lines per minute depending oncharacter set lengths of 128, 96, 64, or 48 characters respectively. There are 132 printpositions. Printing is accomplished by 66 rear double-wide hammers which selectively forcethe paper against an inked ribbon and print belt. The print belt is a 48-inch continuous steelbelt with 192 etched characters.The pin feed carriage handles up to six part forms. Use of continuous card stock formsis not permited. A single line space takes 34ms and the carriage skip speed is 12 inches persecond. The printer is controlled by a cycle stealing attachment which contains a print linebuffer and a belt image buffer. Printing and carriage movement are accomplished throughthe use of common logic controls and a print hammer and control the buffer/driver. Theattachment is code independent and can accept EBCDIC, ASCII, or any other 8 bit code.The print belt is operator interchangeable and the adapter will accept allstandard 5024 print belts. The user must supply the attachment with the proper beltimage.The carriage is controlled by an electronic Vertical Forms Control (VFC). Theuser program supplies forms length and overflow line information. Once the forms arealigned by the operator, the carriage can skip to any line on the form or space up to123 lines.Initiate I/OThe printer attachment is programmed via the Initiate I/O command. When an InitiateI/O command is issued, the printer attachment cycle steals the command word from theIOTB to determine what data will be transferred from main storage to the printer. If themodule address (MA) is not zero a program check occurs. The initiate I/O has the followingformat:0 0 017-18 GA34-0003