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

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

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11 11 1111111111 1 111111111111111111111111111111111111 p 1111111111111111111 1111111■ III ■ 111111•111111.11111•11 1111111111111111101 -• Output Belt Image 1011. This command starts <strong>the</strong> transfer of beltimage data from main storage to <strong>the</strong> printer attachment. The belt image data fieldincludes <strong>the</strong> representation of <strong>the</strong> printable characters in <strong>the</strong> order <strong>the</strong>y appear on<strong>the</strong> print belt. The belt image is 100 words and <strong>the</strong> following format:0 7 8 1501 1 29596979899100189 190191 192BlankrepresentationCharacterset lengthZero(0100 for belt cleaning modeliZeroCheck sum— Words 01 thru 96. These locations contain <strong>the</strong> 192 positions of <strong>the</strong> belt image:a. 48 character set contained 4 times.b. 64 character set contained 3 times.c. 96 character set contained 2 times.d. 128 character set contained 1 and 1/2 times.Note. Refer to Figure 17-8 for <strong>the</strong> relative belt positions, characters, and EBCDICreference numbers for <strong>the</strong> four character sets.—Blank Representation. The representation of <strong>the</strong> character used to print a blankcharacter.Character Set Length. A value, of 47, 63, 95, or 127 normally is in <strong>the</strong> low orderbyte. This represents <strong>the</strong> number of characters detected between home pulses. Thiscount is unpredictable after power on reset until <strong>the</strong> print belt is brought up tospeed and into sync.CharactersonbeltValue in characterset length fieldHexBinary48 2F 0010111164 3F 0011111196 5F 01011111128 7F 01111111— Word 98. If this word contains a hex value of 0100, a 128 character set mode isforced for belt cleaning purposes.— Check Sum. The checksum algorithm for <strong>the</strong> belt image begins with <strong>the</strong> hex valueof X'FFFF' and consecutively exclusive OR's (V) <strong>the</strong> first 99 words of <strong>the</strong> belt image.This is shown in <strong>the</strong> following format: Checksum = X`FFFF'VW01VW02VW03....VW99

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