Home » Archimedes archive » Acorn User » AU 1996-01.adf » Regulars » Education/netscrap/ScrapTxT
Education/netscrap/ScrapTxT
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Acorn User » AU 1996-01.adf » Regulars |
| Filename: | Education/netscrap/ScrapTxT |
| Read OK: | ✔ |
| File size: | 0FD1 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
Dear Geoff After reading Bill Lamin's article 'Turbocharging the network' I thought that we had a more refined solution so I have enclosed an article for your perusal which may be of interest to your readers. I think that this would probably be of great benefit to Mr. Lamin on his network and we will send you a copy of !NetScrap to put on the disc if you wish. Hope this is OK and if there is anything else I can do please get in touch. Allan ----------------------------------------------------------------------------- Network GTI Allan Kealey Like Bill Lamin we have also been struggling with an Acorn Ethernet network but have come up with a different approach to the !Scrap problem. I did not relish the thought of copying !Scrap into every pupils user area on our network and toyed with several ideas. The most outlandish involved getting the network boot up routine to create a RAM disc on the users machine when that machine logged onto the network. This would have !Scrap loaded into it which would then be moved on to the users network area. This seemed very complicated and not really worth the effort. The process that is described below works on our network and has, touch wood, never caused any problems at all! The Network Our network has a main fileserver which runs Level 4, CD Net II and !Netgain, a very much ignored but very efficient application server. In a similar way to Bill Lamin's network when client stations are first switched on they log onto the network and various management issues are dealt with i.e. !Alarms and !Configure are unplugged, a backdrop with useful programs pinned to it is loaded, the floppy disc icon is removed from the icon bar and the Netgain module is loaded. This ensures that there are no viruses or games etc to bother about! We also run a file transfer service for pupils who wish to bring work from home. Netgain is a read only filing system and all the applications that the pupils used are stored in it. The access most of these programs through the Apps folder on the icon bar the most popular ones are pinned to the backdrop to make the system even easier to use. We only have 700 users but we quickly realised that the memory overheads from the !Scrap application alone was more than we could stand plus we also could foresee problems if a pupil deleted this important application. We developed !NetScrap. !NetScrap We try to run a tidy network and feel that we should lead by example so we make sure that all the applications the pupils use are organised in a Directory tree i.e. all the Word Processors together, Design Processor in a folder on its own etc. Certain applications require !Scrap whilst others do not so a copy of !NetScrap is put into each of these directories i.e. the Printers directory contains !Printers, !EcoPrint and !NetScrap. All pupils are encouraged to log on every time they use the network so the problem of the scrap directory then becomes an easy one to solve. One unexpected advantage from this was that pupils cannot print if they are not logged on, this prevents random printing! !NetScrap creates a dummy !Scrap directory in the users network area if one does not already exist and points all the users of !Scrap to this dummy directory. If the pupils delete this directory then !NetScrap will automatically recreate this directory the next time !NetScrap is seen. The memory overheads are non-existant. Files are occasionally left behind in the dummy scrap directory but this is usually due to some error with the application using scrap. I counted the memory requirements of theses dummy directories of twenty of our network users and found it to be a massive 0K! The application itself is only 5K so we are justifiably satisfied with our solution. There is one unforeseen niggle. The first time the dummy scrap directory is created an error message 'Expression is a String' is generated. If the user clicks on Cancel everything just works! I must acknowledge D. Taylor of Room 20 software for his assistance.
00000000 44 65 61 72 20 47 65 6f 66 66 0a 41 66 74 65 72 |Dear Geoff.After| 00000010 20 72 65 61 64 69 6e 67 20 42 69 6c 6c 20 4c 61 | reading Bill La| 00000020 6d 69 6e 27 73 20 61 72 74 69 63 6c 65 20 27 54 |min's article 'T| 00000030 75 72 62 6f 63 68 61 72 67 69 6e 67 20 74 68 65 |urbocharging the| 00000040 20 6e 65 74 77 6f 72 6b 27 20 49 20 74 68 6f 75 | network' I thou| 00000050 67 68 74 20 74 68 61 74 20 77 65 20 68 61 64 20 |ght that we had | 00000060 61 20 6d 6f 72 65 20 72 65 66 69 6e 65 64 20 73 |a more refined s| 00000070 6f 6c 75 74 69 6f 6e 20 73 6f 20 49 20 68 61 76 |olution so I hav| 00000080 65 20 65 6e 63 6c 6f 73 65 64 20 61 6e 20 61 72 |e enclosed an ar| 00000090 74 69 63 6c 65 20 66 6f 72 20 79 6f 75 72 20 70 |ticle for your p| 000000a0 65 72 75 73 61 6c 20 77 68 69 63 68 20 6d 61 79 |erusal which may| 000000b0 20 62 65 20 6f 66 20 69 6e 74 65 72 65 73 74 20 | be of interest | 000000c0 74 6f 20 79 6f 75 72 20 72 65 61 64 65 72 73 2e |to your readers.| 000000d0 20 20 49 20 74 68 69 6e 6b 20 74 68 61 74 20 74 | I think that t| 000000e0 68 69 73 20 77 6f 75 6c 64 20 70 72 6f 62 61 62 |his would probab| 000000f0 6c 79 20 62 65 20 6f 66 20 67 72 65 61 74 20 62 |ly be of great b| 00000100 65 6e 65 66 69 74 20 74 6f 20 4d 72 2e 20 4c 61 |enefit to Mr. La| 00000110 6d 69 6e 20 6f 6e 20 68 69 73 20 6e 65 74 77 6f |min on his netwo| 00000120 72 6b 20 61 6e 64 20 77 65 20 77 69 6c 6c 20 73 |rk and we will s| 00000130 65 6e 64 20 79 6f 75 20 61 20 63 6f 70 79 20 6f |end you a copy o| 00000140 66 20 21 4e 65 74 53 63 72 61 70 20 74 6f 20 70 |f !NetScrap to p| 00000150 75 74 20 6f 6e 20 74 68 65 20 64 69 73 63 20 69 |ut on the disc i| 00000160 66 20 79 6f 75 20 77 69 73 68 2e 20 20 48 6f 70 |f you wish. Hop| 00000170 65 20 74 68 69 73 20 69 73 20 4f 4b 20 61 6e 64 |e this is OK and| 00000180 20 69 66 20 74 68 65 72 65 20 69 73 20 61 6e 79 | if there is any| 00000190 74 68 69 6e 67 20 65 6c 73 65 20 49 20 63 61 6e |thing else I can| 000001a0 20 64 6f 20 70 6c 65 61 73 65 20 67 65 74 20 69 | do please get i| 000001b0 6e 20 74 6f 75 63 68 2e 0a 0a 41 6c 6c 61 6e 0a |n touch...Allan.| 000001c0 0a 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |.---------------| 000001d0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------| * 00000200 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a |--------------..| 00000210 4e 65 74 77 6f 72 6b 20 47 54 49 20 20 20 20 20 |Network GTI | 00000220 09 09 41 6c 6c 61 6e 20 4b 65 61 6c 65 79 0a 0a |..Allan Kealey..| 00000230 4c 69 6b 65 20 42 69 6c 6c 20 4c 61 6d 69 6e 20 |Like Bill Lamin | 00000240 77 65 20 68 61 76 65 20 61 6c 73 6f 20 62 65 65 |we have also bee| 00000250 6e 20 73 74 72 75 67 67 6c 69 6e 67 20 77 69 74 |n struggling wit| 00000260 68 20 61 6e 20 41 63 6f 72 6e 20 45 74 68 65 72 |h an Acorn Ether| 00000270 6e 65 74 20 6e 65 74 77 6f 72 6b 20 62 75 74 20 |net network but | 00000280 68 61 76 65 20 63 6f 6d 65 20 75 70 20 77 69 74 |have come up wit| 00000290 68 20 61 20 64 69 66 66 65 72 65 6e 74 20 61 70 |h a different ap| 000002a0 70 72 6f 61 63 68 20 74 6f 20 74 68 65 20 21 53 |proach to the !S| 000002b0 63 72 61 70 20 70 72 6f 62 6c 65 6d 2e 20 20 49 |crap problem. I| 000002c0 20 64 69 64 20 6e 6f 74 20 72 65 6c 69 73 68 20 | did not relish | 000002d0 74 68 65 20 74 68 6f 75 67 68 74 20 6f 66 20 63 |the thought of c| 000002e0 6f 70 79 69 6e 67 20 21 53 63 72 61 70 20 69 6e |opying !Scrap in| 000002f0 74 6f 20 65 76 65 72 79 20 70 75 70 69 6c 73 20 |to every pupils | 00000300 75 73 65 72 20 61 72 65 61 20 6f 6e 20 6f 75 72 |user area on our| 00000310 20 6e 65 74 77 6f 72 6b 20 61 6e 64 20 74 6f 79 | network and toy| 00000320 65 64 20 77 69 74 68 20 73 65 76 65 72 61 6c 20 |ed with several | 00000330 69 64 65 61 73 2e 20 20 54 68 65 20 6d 6f 73 74 |ideas. The most| 00000340 20 6f 75 74 6c 61 6e 64 69 73 68 20 69 6e 76 6f | outlandish invo| 00000350 6c 76 65 64 20 67 65 74 74 69 6e 67 20 74 68 65 |lved getting the| 00000360 20 6e 65 74 77 6f 72 6b 20 62 6f 6f 74 20 75 70 | network boot up| 00000370 20 72 6f 75 74 69 6e 65 20 74 6f 20 63 72 65 61 | routine to crea| 00000380 74 65 20 61 20 52 41 4d 20 64 69 73 63 20 6f 6e |te a RAM disc on| 00000390 20 74 68 65 20 75 73 65 72 73 20 6d 61 63 68 69 | the users machi| 000003a0 6e 65 20 77 68 65 6e 20 74 68 61 74 20 6d 61 63 |ne when that mac| 000003b0 68 69 6e 65 20 6c 6f 67 67 65 64 20 6f 6e 74 6f |hine logged onto| 000003c0 20 74 68 65 20 6e 65 74 77 6f 72 6b 2e 20 20 54 | the network. T| 000003d0 68 69 73 20 77 6f 75 6c 64 20 68 61 76 65 20 21 |his would have !| 000003e0 53 63 72 61 70 20 6c 6f 61 64 65 64 20 69 6e 74 |Scrap loaded int| 000003f0 6f 20 69 74 20 77 68 69 63 68 20 77 6f 75 6c 64 |o it which would| 00000400 20 74 68 65 6e 20 62 65 20 6d 6f 76 65 64 20 6f | then be moved o| 00000410 6e 20 74 6f 20 74 68 65 20 75 73 65 72 73 20 6e |n to the users n| 00000420 65 74 77 6f 72 6b 20 61 72 65 61 2e 20 20 54 68 |etwork area. Th| 00000430 69 73 20 73 65 65 6d 65 64 20 76 65 72 79 20 63 |is seemed very c| 00000440 6f 6d 70 6c 69 63 61 74 65 64 20 61 6e 64 20 6e |omplicated and n| 00000450 6f 74 20 72 65 61 6c 6c 79 20 77 6f 72 74 68 20 |ot really worth | 00000460 74 68 65 20 65 66 66 6f 72 74 2e 20 20 54 68 65 |the effort. The| 00000470 20 70 72 6f 63 65 73 73 20 74 68 61 74 20 69 73 | process that is| 00000480 20 64 65 73 63 72 69 62 65 64 20 62 65 6c 6f 77 | described below| 00000490 20 77 6f 72 6b 73 20 6f 6e 20 6f 75 72 20 6e 65 | works on our ne| 000004a0 74 77 6f 72 6b 20 61 6e 64 20 68 61 73 2c 20 74 |twork and has, t| 000004b0 6f 75 63 68 20 77 6f 6f 64 2c 20 6e 65 76 65 72 |ouch wood, never| 000004c0 20 63 61 75 73 65 64 20 61 6e 79 20 70 72 6f 62 | caused any prob| 000004d0 6c 65 6d 73 20 61 74 20 61 6c 6c 21 0a 0a 54 68 |lems at all!..Th| 000004e0 65 20 4e 65 74 77 6f 72 6b 0a 4f 75 72 20 6e 65 |e Network.Our ne| 000004f0 74 77 6f 72 6b 20 68 61 73 20 61 20 6d 61 69 6e |twork has a main| 00000500 20 66 69 6c 65 73 65 72 76 65 72 20 77 68 69 63 | fileserver whic| 00000510 68 20 72 75 6e 73 20 4c 65 76 65 6c 20 34 2c 20 |h runs Level 4, | 00000520 43 44 20 4e 65 74 20 49 49 20 61 6e 64 20 21 4e |CD Net II and !N| 00000530 65 74 67 61 69 6e 2c 20 61 20 76 65 72 79 20 6d |etgain, a very m| 00000540 75 63 68 20 69 67 6e 6f 72 65 64 20 62 75 74 20 |uch ignored but | 00000550 76 65 72 79 20 65 66 66 69 63 69 65 6e 74 20 61 |very efficient a| 00000560 70 70 6c 69 63 61 74 69 6f 6e 20 73 65 72 76 65 |pplication serve| 00000570 72 2e 20 20 49 6e 20 61 20 73 69 6d 69 6c 61 72 |r. In a similar| 00000580 20 77 61 79 20 74 6f 20 42 69 6c 6c 20 4c 61 6d | way to Bill Lam| 00000590 69 6e 27 73 20 6e 65 74 77 6f 72 6b 20 77 68 65 |in's network whe| 000005a0 6e 20 63 6c 69 65 6e 74 20 73 74 61 74 69 6f 6e |n client station| 000005b0 73 20 61 72 65 20 66 69 72 73 74 20 73 77 69 74 |s are first swit| 000005c0 63 68 65 64 20 6f 6e 20 74 68 65 79 20 6c 6f 67 |ched on they log| 000005d0 20 6f 6e 74 6f 20 74 68 65 20 6e 65 74 77 6f 72 | onto the networ| 000005e0 6b 20 61 6e 64 20 76 61 72 69 6f 75 73 20 6d 61 |k and various ma| 000005f0 6e 61 67 65 6d 65 6e 74 20 69 73 73 75 65 73 20 |nagement issues | 00000600 61 72 65 20 64 65 61 6c 74 20 77 69 74 68 20 69 |are dealt with i| 00000610 2e 65 2e 20 21 41 6c 61 72 6d 73 20 61 6e 64 20 |.e. !Alarms and | 00000620 21 43 6f 6e 66 69 67 75 72 65 20 61 72 65 20 75 |!Configure are u| 00000630 6e 70 6c 75 67 67 65 64 2c 20 61 20 62 61 63 6b |nplugged, a back| 00000640 64 72 6f 70 20 77 69 74 68 20 75 73 65 66 75 6c |drop with useful| 00000650 20 70 72 6f 67 72 61 6d 73 20 70 69 6e 6e 65 64 | programs pinned| 00000660 20 74 6f 20 69 74 20 69 73 20 6c 6f 61 64 65 64 | to it is loaded| 00000670 2c 20 74 68 65 20 66 6c 6f 70 70 79 20 64 69 73 |, the floppy dis| 00000680 63 20 69 63 6f 6e 20 69 73 20 72 65 6d 6f 76 65 |c icon is remove| 00000690 64 20 66 72 6f 6d 20 74 68 65 20 69 63 6f 6e 20 |d from the icon | 000006a0 62 61 72 20 61 6e 64 20 74 68 65 20 4e 65 74 67 |bar and the Netg| 000006b0 61 69 6e 20 6d 6f 64 75 6c 65 20 69 73 20 6c 6f |ain module is lo| 000006c0 61 64 65 64 2e 20 20 54 68 69 73 20 65 6e 73 75 |aded. This ensu| 000006d0 72 65 73 20 74 68 61 74 20 74 68 65 72 65 20 61 |res that there a| 000006e0 72 65 20 6e 6f 20 76 69 72 75 73 65 73 20 6f 72 |re no viruses or| 000006f0 20 67 61 6d 65 73 20 65 74 63 20 74 6f 20 62 6f | games etc to bo| 00000700 74 68 65 72 20 61 62 6f 75 74 21 20 20 57 65 20 |ther about! We | 00000710 61 6c 73 6f 20 72 75 6e 20 61 20 66 69 6c 65 20 |also run a file | 00000720 74 72 61 6e 73 66 65 72 20 73 65 72 76 69 63 65 |transfer service| 00000730 20 66 6f 72 20 70 75 70 69 6c 73 20 77 68 6f 20 | for pupils who | 00000740 77 69 73 68 20 74 6f 20 62 72 69 6e 67 20 77 6f |wish to bring wo| 00000750 72 6b 20 66 72 6f 6d 20 68 6f 6d 65 2e 0a 4e 65 |rk from home..Ne| 00000760 74 67 61 69 6e 20 69 73 20 61 20 72 65 61 64 20 |tgain is a read | 00000770 6f 6e 6c 79 20 66 69 6c 69 6e 67 20 73 79 73 74 |only filing syst| 00000780 65 6d 20 61 6e 64 20 61 6c 6c 20 74 68 65 20 61 |em and all the a| 00000790 70 70 6c 69 63 61 74 69 6f 6e 73 20 74 68 61 74 |pplications that| 000007a0 20 74 68 65 20 70 75 70 69 6c 73 20 75 73 65 64 | the pupils used| 000007b0 20 61 72 65 20 73 74 6f 72 65 64 20 69 6e 20 69 | are stored in i| 000007c0 74 2e 20 20 54 68 65 20 61 63 63 65 73 73 20 6d |t. The access m| 000007d0 6f 73 74 20 6f 66 20 74 68 65 73 65 20 70 72 6f |ost of these pro| 000007e0 67 72 61 6d 73 20 74 68 72 6f 75 67 68 20 74 68 |grams through th| 000007f0 65 20 41 70 70 73 20 66 6f 6c 64 65 72 20 6f 6e |e Apps folder on| 00000800 20 74 68 65 20 69 63 6f 6e 20 62 61 72 20 74 68 | the icon bar th| 00000810 65 20 6d 6f 73 74 20 70 6f 70 75 6c 61 72 20 6f |e most popular o| 00000820 6e 65 73 20 61 72 65 20 70 69 6e 6e 65 64 20 74 |nes are pinned t| 00000830 6f 20 74 68 65 20 62 61 63 6b 64 72 6f 70 20 74 |o the backdrop t| 00000840 6f 20 6d 61 6b 65 20 74 68 65 20 73 79 73 74 65 |o make the syste| 00000850 6d 20 65 76 65 6e 20 65 61 73 69 65 72 20 74 6f |m even easier to| 00000860 20 75 73 65 2e 20 20 57 65 20 6f 6e 6c 79 20 68 | use. We only h| 00000870 61 76 65 20 37 30 30 20 75 73 65 72 73 20 62 75 |ave 700 users bu| 00000880 74 20 77 65 20 71 75 69 63 6b 6c 79 20 72 65 61 |t we quickly rea| 00000890 6c 69 73 65 64 20 74 68 61 74 20 74 68 65 20 6d |lised that the m| 000008a0 65 6d 6f 72 79 20 6f 76 65 72 68 65 61 64 73 20 |emory overheads | 000008b0 66 72 6f 6d 20 74 68 65 20 21 53 63 72 61 70 20 |from the !Scrap | 000008c0 61 70 70 6c 69 63 61 74 69 6f 6e 20 61 6c 6f 6e |application alon| 000008d0 65 20 77 61 73 20 6d 6f 72 65 20 74 68 61 6e 20 |e was more than | 000008e0 77 65 20 63 6f 75 6c 64 20 73 74 61 6e 64 20 70 |we could stand p| 000008f0 6c 75 73 20 77 65 20 61 6c 73 6f 20 63 6f 75 6c |lus we also coul| 00000900 64 20 66 6f 72 65 73 65 65 20 70 72 6f 62 6c 65 |d foresee proble| 00000910 6d 73 20 69 66 20 61 20 70 75 70 69 6c 20 64 65 |ms if a pupil de| 00000920 6c 65 74 65 64 20 74 68 69 73 20 69 6d 70 6f 72 |leted this impor| 00000930 74 61 6e 74 20 61 70 70 6c 69 63 61 74 69 6f 6e |tant application| 00000940 2e 20 20 57 65 20 64 65 76 65 6c 6f 70 65 64 20 |. We developed | 00000950 21 4e 65 74 53 63 72 61 70 2e 0a 0a 21 4e 65 74 |!NetScrap...!Net| 00000960 53 63 72 61 70 0a 57 65 20 74 72 79 20 74 6f 20 |Scrap.We try to | 00000970 72 75 6e 20 61 20 74 69 64 79 20 6e 65 74 77 6f |run a tidy netwo| 00000980 72 6b 20 61 6e 64 20 66 65 65 6c 20 74 68 61 74 |rk and feel that| 00000990 20 77 65 20 73 68 6f 75 6c 64 20 6c 65 61 64 20 | we should lead | 000009a0 62 79 20 65 78 61 6d 70 6c 65 20 73 6f 20 77 65 |by example so we| 000009b0 20 6d 61 6b 65 20 73 75 72 65 20 74 68 61 74 20 | make sure that | 000009c0 61 6c 6c 20 74 68 65 20 61 70 70 6c 69 63 61 74 |all the applicat| 000009d0 69 6f 6e 73 20 74 68 65 20 70 75 70 69 6c 73 20 |ions the pupils | 000009e0 75 73 65 20 61 72 65 20 6f 72 67 61 6e 69 73 65 |use are organise| 000009f0 64 20 69 6e 20 61 20 44 69 72 65 63 74 6f 72 79 |d in a Directory| 00000a00 20 74 72 65 65 20 69 2e 65 2e 20 61 6c 6c 20 74 | tree i.e. all t| 00000a10 68 65 20 57 6f 72 64 20 50 72 6f 63 65 73 73 6f |he Word Processo| 00000a20 72 73 20 74 6f 67 65 74 68 65 72 2c 20 44 65 73 |rs together, Des| 00000a30 69 67 6e 20 50 72 6f 63 65 73 73 6f 72 20 69 6e |ign Processor in| 00000a40 20 61 20 66 6f 6c 64 65 72 20 6f 6e 20 69 74 73 | a folder on its| 00000a50 20 6f 77 6e 20 65 74 63 2e 20 20 43 65 72 74 61 | own etc. Certa| 00000a60 69 6e 20 61 70 70 6c 69 63 61 74 69 6f 6e 73 20 |in applications | 00000a70 72 65 71 75 69 72 65 20 21 53 63 72 61 70 20 77 |require !Scrap w| 00000a80 68 69 6c 73 74 20 6f 74 68 65 72 73 20 64 6f 20 |hilst others do | 00000a90 6e 6f 74 20 73 6f 20 61 20 63 6f 70 79 20 6f 66 |not so a copy of| 00000aa0 20 21 4e 65 74 53 63 72 61 70 20 69 73 20 70 75 | !NetScrap is pu| 00000ab0 74 20 69 6e 74 6f 20 65 61 63 68 20 6f 66 20 74 |t into each of t| 00000ac0 68 65 73 65 20 64 69 72 65 63 74 6f 72 69 65 73 |hese directories| 00000ad0 20 69 2e 65 2e 20 74 68 65 20 50 72 69 6e 74 65 | i.e. the Printe| 00000ae0 72 73 20 64 69 72 65 63 74 6f 72 79 20 63 6f 6e |rs directory con| 00000af0 74 61 69 6e 73 20 21 50 72 69 6e 74 65 72 73 2c |tains !Printers,| 00000b00 20 21 45 63 6f 50 72 69 6e 74 20 61 6e 64 20 21 | !EcoPrint and !| 00000b10 4e 65 74 53 63 72 61 70 2e 0a 41 6c 6c 20 70 75 |NetScrap..All pu| 00000b20 70 69 6c 73 20 61 72 65 20 65 6e 63 6f 75 72 61 |pils are encoura| 00000b30 67 65 64 20 74 6f 20 6c 6f 67 20 6f 6e 20 65 76 |ged to log on ev| 00000b40 65 72 79 20 74 69 6d 65 20 74 68 65 79 20 75 73 |ery time they us| 00000b50 65 20 74 68 65 20 6e 65 74 77 6f 72 6b 20 73 6f |e the network so| 00000b60 20 74 68 65 20 70 72 6f 62 6c 65 6d 20 6f 66 20 | the problem of | 00000b70 74 68 65 20 73 63 72 61 70 20 64 69 72 65 63 74 |the scrap direct| 00000b80 6f 72 79 20 74 68 65 6e 20 62 65 63 6f 6d 65 73 |ory then becomes| 00000b90 20 61 6e 20 65 61 73 79 20 6f 6e 65 20 74 6f 20 | an easy one to | 00000ba0 73 6f 6c 76 65 2e 20 20 4f 6e 65 20 75 6e 65 78 |solve. One unex| 00000bb0 70 65 63 74 65 64 20 61 64 76 61 6e 74 61 67 65 |pected advantage| 00000bc0 20 66 72 6f 6d 20 74 68 69 73 20 77 61 73 20 74 | from this was t| 00000bd0 68 61 74 20 70 75 70 69 6c 73 20 63 61 6e 6e 6f |hat pupils canno| 00000be0 74 20 70 72 69 6e 74 20 69 66 20 74 68 65 79 20 |t print if they | 00000bf0 61 72 65 20 6e 6f 74 20 6c 6f 67 67 65 64 20 6f |are not logged o| 00000c00 6e 2c 20 74 68 69 73 20 70 72 65 76 65 6e 74 73 |n, this prevents| 00000c10 20 72 61 6e 64 6f 6d 20 70 72 69 6e 74 69 6e 67 | random printing| 00000c20 21 20 20 0a 21 4e 65 74 53 63 72 61 70 20 63 72 |! .!NetScrap cr| 00000c30 65 61 74 65 73 20 61 20 64 75 6d 6d 79 20 21 53 |eates a dummy !S| 00000c40 63 72 61 70 20 64 69 72 65 63 74 6f 72 79 20 69 |crap directory i| 00000c50 6e 20 74 68 65 20 75 73 65 72 73 20 6e 65 74 77 |n the users netw| 00000c60 6f 72 6b 20 61 72 65 61 20 69 66 20 6f 6e 65 20 |ork area if one | 00000c70 64 6f 65 73 20 6e 6f 74 20 61 6c 72 65 61 64 79 |does not already| 00000c80 20 65 78 69 73 74 20 61 6e 64 20 70 6f 69 6e 74 | exist and point| 00000c90 73 20 61 6c 6c 20 74 68 65 20 75 73 65 72 73 20 |s all the users | 00000ca0 6f 66 20 21 53 63 72 61 70 20 74 6f 20 74 68 69 |of !Scrap to thi| 00000cb0 73 20 64 75 6d 6d 79 20 64 69 72 65 63 74 6f 72 |s dummy director| 00000cc0 79 2e 20 20 49 66 20 74 68 65 20 70 75 70 69 6c |y. If the pupil| 00000cd0 73 20 64 65 6c 65 74 65 20 74 68 69 73 20 64 69 |s delete this di| 00000ce0 72 65 63 74 6f 72 79 20 74 68 65 6e 20 21 4e 65 |rectory then !Ne| 00000cf0 74 53 63 72 61 70 20 77 69 6c 6c 20 61 75 74 6f |tScrap will auto| 00000d00 6d 61 74 69 63 61 6c 6c 79 20 72 65 63 72 65 61 |matically recrea| 00000d10 74 65 20 74 68 69 73 20 64 69 72 65 63 74 6f 72 |te this director| 00000d20 79 20 74 68 65 20 6e 65 78 74 20 74 69 6d 65 20 |y the next time | 00000d30 21 4e 65 74 53 63 72 61 70 20 69 73 20 73 65 65 |!NetScrap is see| 00000d40 6e 2e 20 20 54 68 65 20 6d 65 6d 6f 72 79 20 6f |n. The memory o| 00000d50 76 65 72 68 65 61 64 73 20 61 72 65 20 6e 6f 6e |verheads are non| 00000d60 2d 65 78 69 73 74 61 6e 74 2e 20 20 46 69 6c 65 |-existant. File| 00000d70 73 20 61 72 65 20 6f 63 63 61 73 69 6f 6e 61 6c |s are occasional| 00000d80 6c 79 20 6c 65 66 74 20 62 65 68 69 6e 64 20 69 |ly left behind i| 00000d90 6e 20 74 68 65 20 64 75 6d 6d 79 20 73 63 72 61 |n the dummy scra| 00000da0 70 20 64 69 72 65 63 74 6f 72 79 20 62 75 74 20 |p directory but | 00000db0 74 68 69 73 20 69 73 20 75 73 75 61 6c 6c 79 20 |this is usually | 00000dc0 64 75 65 20 74 6f 20 73 6f 6d 65 20 65 72 72 6f |due to some erro| 00000dd0 72 20 77 69 74 68 20 74 68 65 20 61 70 70 6c 69 |r with the appli| 00000de0 63 61 74 69 6f 6e 20 75 73 69 6e 67 20 73 63 72 |cation using scr| 00000df0 61 70 2e 20 20 49 20 63 6f 75 6e 74 65 64 20 74 |ap. I counted t| 00000e00 68 65 20 6d 65 6d 6f 72 79 20 72 65 71 75 69 72 |he memory requir| 00000e10 65 6d 65 6e 74 73 20 6f 66 20 74 68 65 73 65 73 |ements of theses| 00000e20 20 64 75 6d 6d 79 20 64 69 72 65 63 74 6f 72 69 | dummy directori| 00000e30 65 73 20 6f 66 20 74 77 65 6e 74 79 20 6f 66 20 |es of twenty of | 00000e40 6f 75 72 20 6e 65 74 77 6f 72 6b 20 75 73 65 72 |our network user| 00000e50 73 20 61 6e 64 20 66 6f 75 6e 64 20 69 74 20 74 |s and found it t| 00000e60 6f 20 62 65 20 61 20 6d 61 73 73 69 76 65 20 30 |o be a massive 0| 00000e70 4b 21 20 20 54 68 65 20 61 70 70 6c 69 63 61 74 |K! The applicat| 00000e80 69 6f 6e 20 69 74 73 65 6c 66 20 69 73 20 6f 6e |ion itself is on| 00000e90 6c 79 20 35 4b 20 73 6f 20 77 65 20 61 72 65 20 |ly 5K so we are | 00000ea0 6a 75 73 74 69 66 69 61 62 6c 79 20 73 61 74 69 |justifiably sati| 00000eb0 73 66 69 65 64 20 77 69 74 68 20 6f 75 72 20 73 |sfied with our s| 00000ec0 6f 6c 75 74 69 6f 6e 2e 0a 0a 54 68 65 72 65 20 |olution...There | 00000ed0 69 73 20 6f 6e 65 20 75 6e 66 6f 72 65 73 65 65 |is one unforesee| 00000ee0 6e 20 6e 69 67 67 6c 65 2e 20 20 54 68 65 20 66 |n niggle. The f| 00000ef0 69 72 73 74 20 74 69 6d 65 20 74 68 65 20 64 75 |irst time the du| 00000f00 6d 6d 79 20 73 63 72 61 70 20 64 69 72 65 63 74 |mmy scrap direct| 00000f10 6f 72 79 20 69 73 20 63 72 65 61 74 65 64 20 61 |ory is created a| 00000f20 6e 20 65 72 72 6f 72 20 6d 65 73 73 61 67 65 20 |n error message | 00000f30 27 45 78 70 72 65 73 73 69 6f 6e 20 69 73 20 61 |'Expression is a| 00000f40 20 53 74 72 69 6e 67 27 20 69 73 20 67 65 6e 65 | String' is gene| 00000f50 72 61 74 65 64 2e 20 20 49 66 20 74 68 65 20 75 |rated. If the u| 00000f60 73 65 72 20 63 6c 69 63 6b 73 20 6f 6e 20 43 61 |ser clicks on Ca| 00000f70 6e 63 65 6c 20 65 76 65 72 79 74 68 69 6e 67 20 |ncel everything | 00000f80 6a 75 73 74 20 77 6f 72 6b 73 21 0a 0a 49 20 6d |just works!..I m| 00000f90 75 73 74 20 61 63 6b 6e 6f 77 6c 65 64 67 65 20 |ust acknowledge | 00000fa0 44 2e 20 54 61 79 6c 6f 72 20 6f 66 20 52 6f 6f |D. Taylor of Roo| 00000fb0 6d 20 32 30 20 73 6f 66 74 77 61 72 65 20 66 6f |m 20 software fo| 00000fc0 72 20 68 69 73 20 61 73 73 69 73 74 61 6e 63 65 |r his assistance| 00000fd0 2e |.| 00000fd1
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