IBM 7090 User Manual

S 1 234 5 678 91011121314151617181920212223242526272829303132333435
10001111:110;01 oio 0 0:0 0 010 0 010 0 0:001;011;01 oio 011
00000-
Read Select
Channel A Card Reader
10 0 011 0 1 i1 0 0:0 0 oio 0 0;0 0 010 0 010 0 0;0 0 0;0 0 0;0 0 1:0 01
00001-
Reset Channel A Registers and Load a Command From Location 00012
10 0 010 0 0:1 1 oio 0 0;0 0 0;0 0 010 0 010 0 0;0 0 0:0 0 010 0 oio 01
00002-
While Channel A is In Operation, Take the Next Instruction From Location 00002
10 0 011 0 110 0 0:0 0 0:0 0 0;0 0 010 0 010 0 0:0 0 0;0 0 0:0 0 1: 1 0 01
00003-
Clear the AC and Enter the Contents of Location 00014 (A)
10 0 011 0 0;0 a 0;0 a 0iO a 0;0 a 010 a 010 a 0;0 a 0;0 a 010 a 1: 1 a 1 I
00004-
Add to the Contents of the AC From Location 00015 (B)
10 a a 11
0;0 a oio a 1 :0 0 0;0 a 010 a 010 a 0;0 a 0:0 0 oio a 1:0 a 1 I
00005-
Store the Contents of the AC at Location 00011 (C)
10 0 a 11 oio a oio a 010 a 010 a 0;0 a 1:0 1 1:1
0;0 01
00006-
Write Select
Channel A Printer
10 a 01101110 oio 0 010 a 0:0 0 010 a 010 0 0:0 0 oio 0 olo 01:0 11
00007-
Reset Channel A Registers and Load a Command From Location 00013
10 0 010 0 oio 0 0:0 0 oio 0 oio 0 010 0 010 0 oio 0 oio 0 0;0 0 0:0 a 01
00010- Halt CPU Operation. When Started Again, Take the Next Instruction From Location 00000
00011- This Location is Reserved for C.
1
0
0 010 0 OiO 0 0:0 0 0:0 0 0;0 1 010 a 010 a ala 0 oio 0 0:0 0 1: 1 a 01
00012- Run the Selected I/o Unit for Only Two Words, Starting at Location 00014 (Read A and B)
10 0 010 0 0;0 a 0:0 a 0;0 0 0:0 a 110 a 010 0 0;0 a 0:0 a 0;0 a 1io a 1 I
00013-
Run the Selected I/O Unit for Only One Word, Located at 00011 (Print C)
FIGURE 2.4-1. PROGRAM WORDS FOR A + B = C, PRINT C
19

IBM 7090 Specifications

General

Category	Mainframe Computer
Introduced	1959
Transistor-based	Yes
Word Length	36 bits
Add Time	4.8 microseconds
Memory	Core memory
Memory (words)	32, 768 words