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

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Character bit position 84 Tape movement• • • • • • • • • • • • • • • •1• • • • • • • • • • • • • • • • • • •Character bit position 1Character bit 1positions10011381 8 1 8 1i1000 0010 0001 1100 0100 '0010Storage address 0 Storage address 18001018 2 1 1 C 4 2 2\Figure 9-3. IPL from 5028 tape readerThe operator station is programmed using <strong>the</strong> prepare I/O command as described inChapter 4 under "Input/Output Instruction." Data is transferred between <strong>the</strong> processorand <strong>the</strong> operator station adapter by immediate read and immediate write commands. Thesetting of <strong>the</strong> modifier field bits in an immediate command fur<strong>the</strong>r defines <strong>the</strong> operationto be performed.<strong>All</strong> I/O commands to <strong>the</strong> operator station must have a device address of 001000 and amodule address of 000000.Characters are stored into, or transmitted from, bits 8 to 15 of an index register oraccumulator; bits 0 to 7 are not affected.PRINIMPRIPPII nIPi I 1 1 MP I

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