Home » Archimedes archive » Acorn Computing » 1995 01.adf » 9501 » TechForum/TskAlrmBug/ReadMe
TechForum/TskAlrmBug/ReadMe
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 Computing » 1995 01.adf » 9501 |
| Filename: | TechForum/TskAlrmBug/ReadMe |
| Read OK: | ✔ |
| File size: | 0DE1 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
Is there a bug in RISC OS 3.10's version of !Alarm (module 2.37 24-Apr-1992), which prevents a task setting an alarm via Message_AlarmSet (prm 3-243)? Load !Alarm, then try running SetTskAlm which should set a task alarm for 1996 - if you manage to set the alarm, run RemTskAlm to cancel it - however I'll be surprised if you get that far & were able set an alarm in this way. **************************************************************************** When SetTskAlm is run, !Alarm seems to respond with an error 'Unexpected error :- Unknown or missing variable (5400)', refusing to set the alarm. If you load Resources:$.Resources.Alarm.!RunImage into an editor that can handle BASIC, such as !Edit or the PD !Zap (which is to be recommended), being careful not to renumber it as it is numbered in steps of 5, take a look at the code around line 5400 inside procedure Ab. This isn't easy to read, as it's been squashed, however we can deduce a few things. As pointed out by James Aylett, this code contains references to the variable dd%, but seems to ignore od% once it has been set up. Now, dd% is a variable local to other procedures - & hence also local to any other procs or fns which they call - but which may not be defined when line 5400 gets executed, which is concerned with setting up the time for the task alarm. On the other hand, od% is defined & contains the minutes component for the alarm time, which is clearly of importance. It is therefore rather surprising that this doesn't seem to be subsequently used within Ab. Does this reflect a typographical bug in writing of the source !RunImage program - should the reference to dd% actually be to od%? If so, how come it wasn't noticed when testing, or more recently? - Surely some other programmers have tried to use Message_AlarmSet, or have I just not come across a report of this bug before? To check out if this is the cause of the error we can try correcting for it. The resources file is contained within, & registered by, the !Alarm module. To modify the offending line, all we need to do is load the module from ROM into a suitable byte editor - again !Zap is highly recommended, as it can both grab & edit the data. Ensuring your copy of the grabbed module is version 2.37, locate the byte at offset &7ba3 & change it from &64 to &6f. Save the module to disc, & then load it in the RMA. Check the resources !RunImage file, line 5400, to make sure it has changed as expected - the section 'd%!zb%=dd%' should have become 'd%!zb%=od%'. Finally quit & reload the !Alarm application, then try running SetTaskAlm again. You should now find it works okay. This isn't conclusive proof that !Alarm is bugged as described, but it is pretty damning evidence. Assuming the bug is real & can be fixed as explained, providing a long term fix is not quite so easy, if you want to distribute an application which needs this facility to work, as the patched !Alarm module can't be distributed without permission. Whether Acorn provide an upgrade to be included in !System, or you write a utility to temporarily patch the faulty module when your application loads, you are still going to lose 51Kb of RAM on the end user's machine to hold the updated module in the RMA. That's a big chunk on a 1Mb machine. Please send any abusive mail directly to Acorn. As an afterword, if you don't have a copy of !Zap, but want one, you should be able to pick up the latest version from: The Archimedes Public Domain Library: 39 Knighton Park Road Sydenham London SE26 5RN
00000000 0a 49 73 20 74 68 65 72 65 20 61 20 62 75 67 20 |.Is there a bug | 00000010 69 6e 20 52 49 53 43 20 4f 53 20 33 2e 31 30 27 |in RISC OS 3.10'| 00000020 73 20 76 65 72 73 69 6f 6e 20 6f 66 20 21 41 6c |s version of !Al| 00000030 61 72 6d 20 28 6d 6f 64 75 6c 65 20 32 2e 33 37 |arm (module 2.37| 00000040 0a 32 34 2d 41 70 72 2d 31 39 39 32 29 2c 20 77 |.24-Apr-1992), w| 00000050 68 69 63 68 20 70 72 65 76 65 6e 74 73 20 61 20 |hich prevents a | 00000060 74 61 73 6b 20 73 65 74 74 69 6e 67 20 61 6e 20 |task setting an | 00000070 61 6c 61 72 6d 20 76 69 61 20 4d 65 73 73 61 67 |alarm via Messag| 00000080 65 5f 41 6c 61 72 6d 53 65 74 0a 28 70 72 6d 20 |e_AlarmSet.(prm | 00000090 33 2d 32 34 33 29 3f 0a 0a 4c 6f 61 64 20 21 41 |3-243)?..Load !A| 000000a0 6c 61 72 6d 2c 20 74 68 65 6e 20 74 72 79 20 72 |larm, then try r| 000000b0 75 6e 6e 69 6e 67 20 53 65 74 54 73 6b 41 6c 6d |unning SetTskAlm| 000000c0 20 77 68 69 63 68 20 73 68 6f 75 6c 64 20 73 65 | which should se| 000000d0 74 20 61 20 74 61 73 6b 20 61 6c 61 72 6d 20 66 |t a task alarm f| 000000e0 6f 72 0a 31 39 39 36 20 2d 20 69 66 20 79 6f 75 |or.1996 - if you| 000000f0 20 6d 61 6e 61 67 65 20 74 6f 20 73 65 74 20 74 | manage to set t| 00000100 68 65 20 61 6c 61 72 6d 2c 20 72 75 6e 20 52 65 |he alarm, run Re| 00000110 6d 54 73 6b 41 6c 6d 20 74 6f 20 63 61 6e 63 65 |mTskAlm to cance| 00000120 6c 20 69 74 20 2d 20 68 6f 77 65 76 65 72 0a 49 |l it - however.I| 00000130 27 6c 6c 20 62 65 20 73 75 72 70 72 69 73 65 64 |'ll be surprised| 00000140 20 69 66 20 79 6f 75 20 67 65 74 20 74 68 61 74 | if you get that| 00000150 20 66 61 72 20 26 20 77 65 72 65 20 61 62 6c 65 | far & were able| 00000160 20 73 65 74 20 61 6e 20 61 6c 61 72 6d 20 69 6e | set an alarm in| 00000170 20 74 68 69 73 20 77 61 79 2e 0a 0a 2a 2a 2a 2a | this way...****| 00000180 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 000001c0 2a 2a 2a 2a 2a 2a 2a 2a 0a 0a 57 68 65 6e 20 53 |********..When S| 000001d0 65 74 54 73 6b 41 6c 6d 20 69 73 20 72 75 6e 2c |etTskAlm is run,| 000001e0 20 21 41 6c 61 72 6d 20 73 65 65 6d 73 20 74 6f | !Alarm seems to| 000001f0 20 72 65 73 70 6f 6e 64 20 77 69 74 68 20 61 6e | respond with an| 00000200 20 65 72 72 6f 72 20 27 55 6e 65 78 70 65 63 74 | error 'Unexpect| 00000210 65 64 0a 65 72 72 6f 72 20 3a 2d 20 55 6e 6b 6e |ed.error :- Unkn| 00000220 6f 77 6e 20 6f 72 20 6d 69 73 73 69 6e 67 20 76 |own or missing v| 00000230 61 72 69 61 62 6c 65 20 28 35 34 30 30 29 27 2c |ariable (5400)',| 00000240 20 72 65 66 75 73 69 6e 67 20 74 6f 20 73 65 74 | refusing to set| 00000250 20 74 68 65 20 61 6c 61 72 6d 2e 0a 0a 49 66 20 | the alarm...If | 00000260 79 6f 75 20 6c 6f 61 64 20 52 65 73 6f 75 72 63 |you load Resourc| 00000270 65 73 3a 24 2e 52 65 73 6f 75 72 63 65 73 2e 41 |es:$.Resources.A| 00000280 6c 61 72 6d 2e 21 52 75 6e 49 6d 61 67 65 20 69 |larm.!RunImage i| 00000290 6e 74 6f 20 61 6e 20 65 64 69 74 6f 72 20 74 68 |nto an editor th| 000002a0 61 74 20 63 61 6e 0a 68 61 6e 64 6c 65 20 42 41 |at can.handle BA| 000002b0 53 49 43 2c 20 73 75 63 68 20 61 73 20 21 45 64 |SIC, such as !Ed| 000002c0 69 74 20 6f 72 20 74 68 65 20 50 44 20 21 5a 61 |it or the PD !Za| 000002d0 70 20 28 77 68 69 63 68 20 69 73 20 74 6f 20 62 |p (which is to b| 000002e0 65 20 72 65 63 6f 6d 6d 65 6e 64 65 64 29 2c 0a |e recommended),.| 000002f0 62 65 69 6e 67 20 63 61 72 65 66 75 6c 20 6e 6f |being careful no| 00000300 74 20 74 6f 20 72 65 6e 75 6d 62 65 72 20 69 74 |t to renumber it| 00000310 20 61 73 20 69 74 20 69 73 20 6e 75 6d 62 65 72 | as it is number| 00000320 65 64 20 69 6e 20 73 74 65 70 73 20 6f 66 20 35 |ed in steps of 5| 00000330 2c 20 74 61 6b 65 20 61 0a 6c 6f 6f 6b 20 61 74 |, take a.look at| 00000340 20 74 68 65 20 63 6f 64 65 20 61 72 6f 75 6e 64 | the code around| 00000350 20 6c 69 6e 65 20 35 34 30 30 20 69 6e 73 69 64 | line 5400 insid| 00000360 65 20 70 72 6f 63 65 64 75 72 65 20 41 62 2e 0a |e procedure Ab..| 00000370 0a 54 68 69 73 20 69 73 6e 27 74 20 65 61 73 79 |.This isn't easy| 00000380 20 74 6f 20 72 65 61 64 2c 20 61 73 20 69 74 27 | to read, as it'| 00000390 73 20 62 65 65 6e 20 73 71 75 61 73 68 65 64 2c |s been squashed,| 000003a0 20 68 6f 77 65 76 65 72 20 77 65 20 63 61 6e 20 | however we can | 000003b0 64 65 64 75 63 65 20 61 20 66 65 77 0a 74 68 69 |deduce a few.thi| 000003c0 6e 67 73 2e 0a 0a 41 73 20 70 6f 69 6e 74 65 64 |ngs...As pointed| 000003d0 20 6f 75 74 20 62 79 20 4a 61 6d 65 73 20 41 79 | out by James Ay| 000003e0 6c 65 74 74 2c 20 74 68 69 73 20 63 6f 64 65 20 |lett, this code | 000003f0 63 6f 6e 74 61 69 6e 73 20 72 65 66 65 72 65 6e |contains referen| 00000400 63 65 73 20 74 6f 20 74 68 65 0a 76 61 72 69 61 |ces to the.varia| 00000410 62 6c 65 20 64 64 25 2c 20 62 75 74 20 73 65 65 |ble dd%, but see| 00000420 6d 73 20 74 6f 20 69 67 6e 6f 72 65 20 6f 64 25 |ms to ignore od%| 00000430 20 6f 6e 63 65 20 69 74 20 68 61 73 20 62 65 65 | once it has bee| 00000440 6e 20 73 65 74 20 75 70 2e 0a 0a 4e 6f 77 2c 20 |n set up...Now, | 00000450 64 64 25 20 69 73 20 61 20 76 61 72 69 61 62 6c |dd% is a variabl| 00000460 65 20 6c 6f 63 61 6c 20 74 6f 20 6f 74 68 65 72 |e local to other| 00000470 20 70 72 6f 63 65 64 75 72 65 73 20 2d 20 26 20 | procedures - & | 00000480 68 65 6e 63 65 20 61 6c 73 6f 20 6c 6f 63 61 6c |hence also local| 00000490 20 74 6f 20 61 6e 79 0a 6f 74 68 65 72 20 70 72 | to any.other pr| 000004a0 6f 63 73 20 6f 72 20 66 6e 73 20 77 68 69 63 68 |ocs or fns which| 000004b0 20 74 68 65 79 20 63 61 6c 6c 20 2d 20 62 75 74 | they call - but| 000004c0 20 77 68 69 63 68 20 6d 61 79 20 6e 6f 74 20 62 | which may not b| 000004d0 65 20 64 65 66 69 6e 65 64 20 77 68 65 6e 20 6c |e defined when l| 000004e0 69 6e 65 0a 35 34 30 30 20 67 65 74 73 20 65 78 |ine.5400 gets ex| 000004f0 65 63 75 74 65 64 2c 20 77 68 69 63 68 20 69 73 |ecuted, which is| 00000500 20 63 6f 6e 63 65 72 6e 65 64 20 77 69 74 68 20 | concerned with | 00000510 73 65 74 74 69 6e 67 20 75 70 20 74 68 65 20 74 |setting up the t| 00000520 69 6d 65 20 66 6f 72 20 74 68 65 0a 74 61 73 6b |ime for the.task| 00000530 20 61 6c 61 72 6d 2e 0a 0a 4f 6e 20 74 68 65 20 | alarm...On the | 00000540 6f 74 68 65 72 20 68 61 6e 64 2c 20 6f 64 25 20 |other hand, od% | 00000550 69 73 20 64 65 66 69 6e 65 64 20 26 20 63 6f 6e |is defined & con| 00000560 74 61 69 6e 73 20 74 68 65 20 6d 69 6e 75 74 65 |tains the minute| 00000570 73 20 63 6f 6d 70 6f 6e 65 6e 74 20 66 6f 72 20 |s component for | 00000580 74 68 65 0a 61 6c 61 72 6d 20 74 69 6d 65 2c 20 |the.alarm time, | 00000590 77 68 69 63 68 20 69 73 20 63 6c 65 61 72 6c 79 |which is clearly| 000005a0 20 6f 66 20 69 6d 70 6f 72 74 61 6e 63 65 2e 20 | of importance. | 000005b0 49 74 20 69 73 20 74 68 65 72 65 66 6f 72 65 20 |It is therefore | 000005c0 72 61 74 68 65 72 0a 73 75 72 70 72 69 73 69 6e |rather.surprisin| 000005d0 67 20 74 68 61 74 20 74 68 69 73 20 64 6f 65 73 |g that this does| 000005e0 6e 27 74 20 73 65 65 6d 20 74 6f 20 62 65 20 73 |n't seem to be s| 000005f0 75 62 73 65 71 75 65 6e 74 6c 79 20 75 73 65 64 |ubsequently used| 00000600 20 77 69 74 68 69 6e 20 41 62 2e 0a 0a 44 6f 65 | within Ab...Doe| 00000610 73 20 74 68 69 73 20 72 65 66 6c 65 63 74 20 61 |s this reflect a| 00000620 20 74 79 70 6f 67 72 61 70 68 69 63 61 6c 20 62 | typographical b| 00000630 75 67 20 69 6e 20 77 72 69 74 69 6e 67 20 6f 66 |ug in writing of| 00000640 20 74 68 65 20 73 6f 75 72 63 65 20 21 52 75 6e | the source !Run| 00000650 49 6d 61 67 65 0a 70 72 6f 67 72 61 6d 20 2d 20 |Image.program - | 00000660 73 68 6f 75 6c 64 20 74 68 65 20 72 65 66 65 72 |should the refer| 00000670 65 6e 63 65 20 74 6f 20 64 64 25 20 61 63 74 75 |ence to dd% actu| 00000680 61 6c 6c 79 20 62 65 20 74 6f 20 6f 64 25 3f 0a |ally be to od%?.| 00000690 0a 49 66 20 73 6f 2c 20 68 6f 77 20 63 6f 6d 65 |.If so, how come| 000006a0 20 69 74 20 77 61 73 6e 27 74 20 6e 6f 74 69 63 | it wasn't notic| 000006b0 65 64 20 77 68 65 6e 20 74 65 73 74 69 6e 67 2c |ed when testing,| 000006c0 20 6f 72 20 6d 6f 72 65 20 72 65 63 65 6e 74 6c | or more recentl| 000006d0 79 3f 20 2d 0a 53 75 72 65 6c 79 20 73 6f 6d 65 |y? -.Surely some| 000006e0 20 6f 74 68 65 72 20 70 72 6f 67 72 61 6d 6d 65 | other programme| 000006f0 72 73 20 68 61 76 65 20 74 72 69 65 64 20 74 6f |rs have tried to| 00000700 20 75 73 65 20 4d 65 73 73 61 67 65 5f 41 6c 61 | use Message_Ala| 00000710 72 6d 53 65 74 2c 20 6f 72 20 68 61 76 65 20 49 |rmSet, or have I| 00000720 0a 6a 75 73 74 20 6e 6f 74 20 63 6f 6d 65 20 61 |.just not come a| 00000730 63 72 6f 73 73 20 61 20 72 65 70 6f 72 74 20 6f |cross a report o| 00000740 66 20 74 68 69 73 20 62 75 67 20 62 65 66 6f 72 |f this bug befor| 00000750 65 3f 0a 0a 54 6f 20 63 68 65 63 6b 20 6f 75 74 |e?..To check out| 00000760 20 69 66 20 74 68 69 73 20 69 73 20 74 68 65 20 | if this is the | 00000770 63 61 75 73 65 20 6f 66 20 74 68 65 20 65 72 72 |cause of the err| 00000780 6f 72 20 77 65 20 63 61 6e 20 74 72 79 20 63 6f |or we can try co| 00000790 72 72 65 63 74 69 6e 67 20 66 6f 72 20 69 74 2e |rrecting for it.| 000007a0 0a 54 68 65 20 72 65 73 6f 75 72 63 65 73 20 66 |.The resources f| 000007b0 69 6c 65 20 69 73 20 63 6f 6e 74 61 69 6e 65 64 |ile is contained| 000007c0 20 77 69 74 68 69 6e 2c 20 26 20 72 65 67 69 73 | within, & regis| 000007d0 74 65 72 65 64 20 62 79 2c 20 74 68 65 20 21 41 |tered by, the !A| 000007e0 6c 61 72 6d 20 6d 6f 64 75 6c 65 2e 0a 0a 54 6f |larm module...To| 000007f0 20 6d 6f 64 69 66 79 20 74 68 65 20 6f 66 66 65 | modify the offe| 00000800 6e 64 69 6e 67 20 6c 69 6e 65 2c 20 61 6c 6c 20 |nding line, all | 00000810 77 65 20 6e 65 65 64 20 74 6f 20 64 6f 20 69 73 |we need to do is| 00000820 20 6c 6f 61 64 20 74 68 65 20 6d 6f 64 75 6c 65 | load the module| 00000830 20 66 72 6f 6d 20 52 4f 4d 0a 69 6e 74 6f 20 61 | from ROM.into a| 00000840 20 73 75 69 74 61 62 6c 65 20 62 79 74 65 20 65 | suitable byte e| 00000850 64 69 74 6f 72 20 2d 20 61 67 61 69 6e 20 21 5a |ditor - again !Z| 00000860 61 70 20 69 73 20 68 69 67 68 6c 79 20 72 65 63 |ap is highly rec| 00000870 6f 6d 6d 65 6e 64 65 64 2c 20 61 73 20 69 74 20 |ommended, as it | 00000880 63 61 6e 0a 62 6f 74 68 20 67 72 61 62 20 26 20 |can.both grab & | 00000890 65 64 69 74 20 74 68 65 20 64 61 74 61 2e 0a 0a |edit the data...| 000008a0 45 6e 73 75 72 69 6e 67 20 79 6f 75 72 20 63 6f |Ensuring your co| 000008b0 70 79 20 6f 66 20 74 68 65 20 67 72 61 62 62 65 |py of the grabbe| 000008c0 64 20 6d 6f 64 75 6c 65 20 69 73 20 76 65 72 73 |d module is vers| 000008d0 69 6f 6e 20 32 2e 33 37 2c 20 6c 6f 63 61 74 65 |ion 2.37, locate| 000008e0 20 74 68 65 20 62 79 74 65 0a 61 74 20 6f 66 66 | the byte.at off| 000008f0 73 65 74 20 26 37 62 61 33 20 26 20 63 68 61 6e |set &7ba3 & chan| 00000900 67 65 20 69 74 20 66 72 6f 6d 20 26 36 34 20 74 |ge it from &64 t| 00000910 6f 20 26 36 66 2e 20 53 61 76 65 20 74 68 65 20 |o &6f. Save the | 00000920 6d 6f 64 75 6c 65 20 74 6f 20 64 69 73 63 2c 20 |module to disc, | 00000930 26 0a 74 68 65 6e 20 6c 6f 61 64 20 69 74 20 69 |&.then load it i| 00000940 6e 20 74 68 65 20 52 4d 41 2e 20 43 68 65 63 6b |n the RMA. Check| 00000950 20 74 68 65 20 72 65 73 6f 75 72 63 65 73 20 21 | the resources !| 00000960 52 75 6e 49 6d 61 67 65 20 66 69 6c 65 2c 20 6c |RunImage file, l| 00000970 69 6e 65 20 35 34 30 30 2c 20 74 6f 0a 6d 61 6b |ine 5400, to.mak| 00000980 65 20 73 75 72 65 20 69 74 20 68 61 73 20 63 68 |e sure it has ch| 00000990 61 6e 67 65 64 20 61 73 20 65 78 70 65 63 74 65 |anged as expecte| 000009a0 64 20 2d 20 74 68 65 20 73 65 63 74 69 6f 6e 20 |d - the section | 000009b0 27 64 25 21 7a 62 25 3d 64 64 25 27 20 73 68 6f |'d%!zb%=dd%' sho| 000009c0 75 6c 64 20 68 61 76 65 0a 62 65 63 6f 6d 65 20 |uld have.become | 000009d0 27 64 25 21 7a 62 25 3d 6f 64 25 27 2e 0a 0a 46 |'d%!zb%=od%'...F| 000009e0 69 6e 61 6c 6c 79 20 71 75 69 74 20 26 20 72 65 |inally quit & re| 000009f0 6c 6f 61 64 20 74 68 65 20 21 41 6c 61 72 6d 20 |load the !Alarm | 00000a00 61 70 70 6c 69 63 61 74 69 6f 6e 2c 20 74 68 65 |application, the| 00000a10 6e 20 74 72 79 20 72 75 6e 6e 69 6e 67 20 53 65 |n try running Se| 00000a20 74 54 61 73 6b 41 6c 6d 0a 61 67 61 69 6e 2e 20 |tTaskAlm.again. | 00000a30 59 6f 75 20 73 68 6f 75 6c 64 20 6e 6f 77 20 66 |You should now f| 00000a40 69 6e 64 20 69 74 20 77 6f 72 6b 73 20 6f 6b 61 |ind it works oka| 00000a50 79 2e 20 54 68 69 73 20 69 73 6e 27 74 20 63 6f |y. This isn't co| 00000a60 6e 63 6c 75 73 69 76 65 20 70 72 6f 6f 66 20 74 |nclusive proof t| 00000a70 68 61 74 0a 21 41 6c 61 72 6d 20 69 73 20 62 75 |hat.!Alarm is bu| 00000a80 67 67 65 64 20 61 73 20 64 65 73 63 72 69 62 65 |gged as describe| 00000a90 64 2c 20 62 75 74 20 69 74 20 69 73 20 70 72 65 |d, but it is pre| 00000aa0 74 74 79 20 64 61 6d 6e 69 6e 67 20 65 76 69 64 |tty damning evid| 00000ab0 65 6e 63 65 2e 0a 0a 41 73 73 75 6d 69 6e 67 20 |ence...Assuming | 00000ac0 74 68 65 20 62 75 67 20 69 73 20 72 65 61 6c 20 |the bug is real | 00000ad0 26 20 63 61 6e 20 62 65 20 66 69 78 65 64 20 61 |& can be fixed a| 00000ae0 73 20 65 78 70 6c 61 69 6e 65 64 2c 20 70 72 6f |s explained, pro| 00000af0 76 69 64 69 6e 67 20 61 20 6c 6f 6e 67 20 74 65 |viding a long te| 00000b00 72 6d 0a 66 69 78 20 69 73 20 6e 6f 74 20 71 75 |rm.fix is not qu| 00000b10 69 74 65 20 73 6f 20 65 61 73 79 2c 20 69 66 20 |ite so easy, if | 00000b20 79 6f 75 20 77 61 6e 74 20 74 6f 20 64 69 73 74 |you want to dist| 00000b30 72 69 62 75 74 65 20 61 6e 20 61 70 70 6c 69 63 |ribute an applic| 00000b40 61 74 69 6f 6e 20 77 68 69 63 68 0a 6e 65 65 64 |ation which.need| 00000b50 73 20 74 68 69 73 20 66 61 63 69 6c 69 74 79 20 |s this facility | 00000b60 74 6f 20 77 6f 72 6b 2c 20 61 73 20 74 68 65 20 |to work, as the | 00000b70 70 61 74 63 68 65 64 20 21 41 6c 61 72 6d 20 6d |patched !Alarm m| 00000b80 6f 64 75 6c 65 20 63 61 6e 27 74 20 62 65 0a 64 |odule can't be.d| 00000b90 69 73 74 72 69 62 75 74 65 64 20 77 69 74 68 6f |istributed witho| 00000ba0 75 74 20 70 65 72 6d 69 73 73 69 6f 6e 2e 0a 0a |ut permission...| 00000bb0 57 68 65 74 68 65 72 20 41 63 6f 72 6e 20 70 72 |Whether Acorn pr| 00000bc0 6f 76 69 64 65 20 61 6e 20 75 70 67 72 61 64 65 |ovide an upgrade| 00000bd0 20 74 6f 20 62 65 20 69 6e 63 6c 75 64 65 64 20 | to be included | 00000be0 69 6e 20 21 53 79 73 74 65 6d 2c 20 6f 72 20 79 |in !System, or y| 00000bf0 6f 75 20 77 72 69 74 65 20 61 0a 75 74 69 6c 69 |ou write a.utili| 00000c00 74 79 20 74 6f 20 74 65 6d 70 6f 72 61 72 69 6c |ty to temporaril| 00000c10 79 20 70 61 74 63 68 20 74 68 65 20 66 61 75 6c |y patch the faul| 00000c20 74 79 20 6d 6f 64 75 6c 65 20 77 68 65 6e 20 79 |ty module when y| 00000c30 6f 75 72 20 61 70 70 6c 69 63 61 74 69 6f 6e 20 |our application | 00000c40 6c 6f 61 64 73 2c 0a 79 6f 75 20 61 72 65 20 73 |loads,.you are s| 00000c50 74 69 6c 6c 20 67 6f 69 6e 67 20 74 6f 20 6c 6f |till going to lo| 00000c60 73 65 20 35 31 4b 62 20 6f 66 20 52 41 4d 20 6f |se 51Kb of RAM o| 00000c70 6e 20 74 68 65 20 65 6e 64 20 75 73 65 72 27 73 |n the end user's| 00000c80 20 6d 61 63 68 69 6e 65 20 74 6f 20 68 6f 6c 64 | machine to hold| 00000c90 0a 74 68 65 20 75 70 64 61 74 65 64 20 6d 6f 64 |.the updated mod| 00000ca0 75 6c 65 20 69 6e 20 74 68 65 20 52 4d 41 2e 20 |ule in the RMA. | 00000cb0 54 68 61 74 27 73 20 61 20 62 69 67 20 63 68 75 |That's a big chu| 00000cc0 6e 6b 20 6f 6e 20 61 20 31 4d 62 20 6d 61 63 68 |nk on a 1Mb mach| 00000cd0 69 6e 65 2e 0a 0a 50 6c 65 61 73 65 20 73 65 6e |ine...Please sen| 00000ce0 64 20 61 6e 79 20 61 62 75 73 69 76 65 20 6d 61 |d any abusive ma| 00000cf0 69 6c 20 64 69 72 65 63 74 6c 79 20 74 6f 20 41 |il directly to A| 00000d00 63 6f 72 6e 2e 0a 0a 41 73 20 61 6e 20 61 66 74 |corn...As an aft| 00000d10 65 72 77 6f 72 64 2c 20 69 66 20 79 6f 75 20 64 |erword, if you d| 00000d20 6f 6e 27 74 20 68 61 76 65 20 61 20 63 6f 70 79 |on't have a copy| 00000d30 20 6f 66 20 21 5a 61 70 2c 20 62 75 74 20 77 61 | of !Zap, but wa| 00000d40 6e 74 20 6f 6e 65 2c 20 79 6f 75 20 73 68 6f 75 |nt one, you shou| 00000d50 6c 64 0a 62 65 20 61 62 6c 65 20 74 6f 20 70 69 |ld.be able to pi| 00000d60 63 6b 20 75 70 20 74 68 65 20 6c 61 74 65 73 74 |ck up the latest| 00000d70 20 76 65 72 73 69 6f 6e 20 66 72 6f 6d 3a 0a 0a | version from:..| 00000d80 54 68 65 20 41 72 63 68 69 6d 65 64 65 73 20 50 |The Archimedes P| 00000d90 75 62 6c 69 63 20 44 6f 6d 61 69 6e 20 4c 69 62 |ublic Domain Lib| 00000da0 72 61 72 79 3a 0a 20 20 20 33 39 20 4b 6e 69 67 |rary:. 39 Knig| 00000db0 68 74 6f 6e 20 50 61 72 6b 20 52 6f 61 64 0a 20 |hton Park Road. | 00000dc0 20 20 53 79 64 65 6e 68 61 6d 0a 20 20 20 4c 6f | Sydenham. Lo| 00000dd0 6e 64 6f 6e 0a 20 20 20 53 45 32 36 20 35 52 4e |ndon. SE26 5RN| 00000de0 0a |.| 00000de1
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