Olivetti DE 520 Series Manual Download Page 1 | Manualshive

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Summary of Contents for DE 520 Series

Page 1: ...DE 520 SYSTEM and Magnetic Tapes 9 M t t fs l i p lU r J tA J s l r I l i i The Centre for Computing History www ConiputingHistofy org uk n 7i I n I f i r_...

Page 2: ...THE DE 520 SYSTEM AND MAGNETIC TAPES C c Produced by IDP Software British Olivetti Limited 30 Berkeley Square London W1X 6AH...

Page 3: ...ette Option 2 Computer Compatible Tape Option The manual is split into two sections The first section Cassettes System details the operations that can apply to both cassette and computer tape options...

Page 4: ...Verify Mode 9 Search Under Batch Mode JO Error Messages THE DE 523 AND COMPUTER MAGNETIC TAPE 14 Introduction 4 TAPE OPERATIONS 15 Read IS Backspace 15 Write S Write File 15 Rewind 15 Insert 15 TERMI...

Page 5: ...a bit parity check Two possible inter record gap sizes are available 0 75 inch and 1 5 inch CRR IB compatible The 0 75 inch ihter record gap is standard on the DE 520 System the 1 5 inch inter record...

Page 6: ...CRT BRILLIANCE CONTROL lii I I ji j i hIIIIIHIIIll ll U it lo il A Y V rV iV I M 4 f f f Xj j j ii f TONE CONTROL ON OFF SWITCH RESET BUTTON...

Page 7: ......

Page 8: ...ng on record size 216 80 characters respectively and the size of inter record gaps RECORD HANDLING TECHNIQUES I The cassette recorder feature provides the terminal with the ability to read write I bac...

Page 9: ...thout an error indication Ifthe cassette recorder is non operational the operation is terminated without an error indication WRITE The Write operation transfers the data in the specified buffe onto th...

Page 10: ...ical to the Read operation REWIND The Rewind operation rewinds the selected cassette tape until the beginning of tape BOT Clear Leader is sensed If the tape is positioned on a Clear Leader at the time...

Page 11: ...format programs if used are usually stored on one of the two cassettes This cassette is therefore encoded as the format device in the assignment code MANUAL CONTROL Manual control of cassette recorde...

Page 12: ...put operation to a protected tape corrective action 1 To accept record depress the Error Reset key 2 To re read record depress Back Red Adv Red and Error Reset keys 3 To skip record depress Adv Red ke...

Page 13: ...haracter APPENDIX D TYPICAL COMPUTER TAPE FORMAT ON THE DE 523 SYSTEM Forward tape motion N B i For an End of Tape Record no CRC is present ii With a 7 track tape no CRC is present z Inter Record Gap...

Page 14: ...Amount 1 Key in the format program see DE 520 General Manual pages 16 19 F D P y D 2 Depress Fmat Device Control key 3 Depress Write key 4 Depress Back Red key 5 Depress Adv Red key The format progra...

Page 15: ...trol of entry should be by the format program in program 1 buffer and not by the description in program 2 buffer Note The first line of the format program and the first line of the description are dis...

Page 16: ...be placed in the same position as they would appear in the required record c Character positions not to be compared are filled with SKIP characters when keying the search format d If searching for a...

Page 17: ...made to in put or output to the second cassette recorder which is not provided on the terminal e g en coding a 2 as an input or output device on the DE 521 11 corrective action 1 To accept record depr...

Page 18: ...ad or Write head with tape stationary Q Short Distance Start Delay Start of Record _ Mark Transition Four Character Spaces Bit Data Record vx Tape Record FIG 2 NOMINAL RECORD 12 Stop Distance Stop Del...

Page 19: ...s of data 8 bits of data L 1 0 1 1 0 0 1 0 1 1 1 0 1 0 1 0 1 0 A 0 1 0 0 1 1 0 1 0 0 0 1 0 1 0 1 0 1 B Tape data byte C D A Data Track B Parallel Parity Track C Data Track Flux D Parallel Parity Track...

Page 20: ...The magnetic tape option consists of a set of programs for controlling the option a tape interface a connecting cable and tape transport The programs for controlling the option and the ASCII BCD or AS...

Page 21: ...on the screen The clear leader and tail of the cassette correspond tothe BOT and EOT markers of the computer magnetic tape errors correspond to those of the cassette write operation WRITE FILE The Wri...

Page 22: ...ewind the computer tape to the beginning OPERATIONAL MODES USING THE COMPUTER TAPE Computer tape systems usually incorporate cassettes For example a cassette as an input device and the computer tape a...

Page 23: ...ppear within the record For example a To search for a record with a 6 in position four and an F in position eight ___6___FBi b To transfer all records onto output tape The COMP H character initiates t...

Page 24: ...041 I 052 n 042 f t 057 043 013 043 044 053 045 034 050 046 060 053 t 047 t 077 137 050 034 050 051 074 052 054 053 060 053 054 033 055 040 056 073 057 021 0 060 0 012 1 061 1 001 2 062 2 002 3 063 3...

Page 25: ...ES EBCDIC CODES GRAPHIC OCTAL HEX GRAPHIC OCTAL HEX BS 010 08 BS 026 16 HT 011 09 HT 005 05 LF 012 OA LF 045 25 VT 013 OB VT 013 OB FF 014 OC FF 014 OC CR 015 OD CR 015 OD EM 031 19 EM 031 19 ESC 033...

Page 26: ...4 60 046 26 120 50 f 047 27 9 175 7D 050 28 115 4D 051 29 135 5D 052 2A 134 5C 053 2B 116 4E 054 20 153 6B 055 2D 140 60 056 2E 113 4B 057 2G 141 61 0 060 30 0 360 FO 1 061 31 1 361 F1 2 062 32 2 362...

Page 27: ...6 C6 G 107 47 G 307 C7 H 110 48 H 310 C8 1 111 49 1 311 C9 J 112 4A J 321 D1 K 113 4B K 322 D2 L 114 4C L 323 D3 M 115 4D M 324 D4 N 116 4E N 325 05 0 117 4F 0 326 D6 P 120 50 P 327 07 0 121 51 Q 330...

Page 28: ...107 G 067 H 110 H 070 1 111 1 071 J 112 J 041 K 113 K 042 L 114 L 043 M 115 M 044 N 116 N 045 0 117 0 046 P 120 P 047 Q 121 Q 050 R 122 R 051 S 123 S 022 T 124 T 023 U 125 U 024 V 126 V 025 w 127 w 0...

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