IBM 610 Manual Of Operation

Also see for 610: Technical overview and introduction

38 IBM 6 10Figure 36 shows the wiring of a fairly complexdecision problem, the selection of any one of fourresponse classes, depending upon the sign of the con-tents of register 14 and register 23. The table, below,lists the possible combinations of + or — using tworegisters, and the response class to be chosen.Miscellaneous HubsThe remaining hubs on the control panel are thefollowing:WO ENDRegister 14positivepositivenegativenegativeRegister 23positivenegativepositivenegativeComputerResponse Class12310 II 12 13 14 19 16 17 IS 20 21 22A-22 e-ZZ C-22 D-22^A-23 ^B-23 ^C-23 0-23A-24 B-24 C-24 D-24A-25 B-25 C-25 D-25020 070 0|2030 O80 0130040 090 or4o050 o 100 o 150o—o 0—0 o-^^ o-^^£-24 F-24 G-24 H-24O O 0~—O Q O O—^cS^ ct?5, ,£1?, cttJiFigure 36. Multiple Response Class ControlFigure 37. Word-End Hubs (AE 13, 14)Word End (Figure 37)(Located at the lower right-hand corner of thegroup of sequence hubs on the control panel.) When-ever numerical information is recorded on the datatapes by the computer, the end of the number isautomatically indicated by the punching of a spe-cial word-end code on the tape (tape section). Whena number is read by the data tape reader, the read-ing of the word-end code causes the word-end hubto emit an impulse. This impulse notifies the com-puter that the entry from the tape is completed; theimpulse can then be wired to a function hub tocause the desired program source to take control. Ifthe control is to go to the program tape reader, theWORD-END hub is wired to the ptr hub. If the controlis to go to the keyboard, the word-end hub is wiredto the KB function hub. If control is to go to the con-trol panel, the word-end hub is wired to the cp huband the computer takes the next program step as in-dicated on the calculator light panel. However, ifthe programmer wishes to begin with a specific pro-gram step, he wires to the in of a prog skip and wiresfrom the our of that prog skip to the program stephub just preceding the first program step he wishesto be executed in a sub-routine wired on the controlpanel.I DIGFigure 38. Single Digit Read-Out (D, 21, 22)Single-Digit Read-Out (Figure 38)At the lower right-hand corner of the group offunction hubs is a connected pair labeled 1 dig. Whenimpulsed, these cause the IBM 610 to read out onedigit at a time, thus allowing for variable word-sizeoutput. If the operator wishes to read out more than