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!AWDec94/Goodies/DrawBasic/!DrawBasic/Library/Examples/Chapter/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.

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Filename: !AWDec94/Goodies/DrawBasic/!DrawBasic/Library/Examples/Chapter/ReadMe
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File size: 057C bytes
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Exec address: 0000
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File contents
 � The program "Error" in this directory has a deliberate error. 

 � You can use this to try out error throwback with DrawBasic.


  STEP 1      Make sure !Edit is on the iconbar (or other appropriate editor�)
  STEP 2      Double-click the program file "Error"
  STEP 3      After the throwback window opens click the button marked
              "Throwback"
  STEP 4      Remember to close the throwback window. Each such window
              uses 32K memory.


Footnotes:
----------
             � All Error throwback does is to automate the process:

               � Open an editor window containing the offending program
               � Then press the "GO TO" key F5
               � Type in the (logical) number of the offending line
               � Press the "OK" button (equivalent to pressing RETURN)
               � Mark the line
                       
               Error throwback sends the appropriate commands to perform
               this. It works with most editors which conform to the
               "standard" configigurations of function keys etc. E.g.
                   
                            � !Edit
                            � !StrongEd  (Tested version 2.50)
                            � !DeskEdit  (Tested version 2.02)

                Unfortunately throwback does not work with the
                excellent editor !Zap (tested version 0.80)
               

00000000  0a 20 8f 20 54 68 65 20  70 72 6f 67 72 61 6d 20  |. . The program |
00000010  22 45 72 72 6f 72 22 20  69 6e 20 74 68 69 73 20  |"Error" in this |
00000020  64 69 72 65 63 74 6f 72  79 20 68 61 73 20 61 20  |directory has a |
00000030  64 65 6c 69 62 65 72 61  74 65 20 65 72 72 6f 72  |deliberate error|
00000040  2e 20 0a 0a 20 8f 20 59  6f 75 20 63 61 6e 20 75  |. .. . You can u|
00000050  73 65 20 74 68 69 73 20  74 6f 20 74 72 79 20 6f  |se this to try o|
00000060  75 74 20 65 72 72 6f 72  20 74 68 72 6f 77 62 61  |ut error throwba|
00000070  63 6b 20 77 69 74 68 20  44 72 61 77 42 61 73 69  |ck with DrawBasi|
00000080  63 2e 0a 0a 0a 20 20 53  54 45 50 20 31 20 20 20  |c....  STEP 1   |
00000090  20 20 20 4d 61 6b 65 20  73 75 72 65 20 21 45 64  |   Make sure !Ed|
000000a0  69 74 20 69 73 20 6f 6e  20 74 68 65 20 69 63 6f  |it is on the ico|
000000b0  6e 62 61 72 20 28 6f 72  20 6f 74 68 65 72 20 61  |nbar (or other a|
000000c0  70 70 72 6f 70 72 69 61  74 65 20 65 64 69 74 6f  |ppropriate edito|
000000d0  72 b9 29 0a 20 20 53 54  45 50 20 32 20 20 20 20  |r.).  STEP 2    |
000000e0  20 20 44 6f 75 62 6c 65  2d 63 6c 69 63 6b 20 74  |  Double-click t|
000000f0  68 65 20 70 72 6f 67 72  61 6d 20 66 69 6c 65 20  |he program file |
00000100  22 45 72 72 6f 72 22 0a  20 20 53 54 45 50 20 33  |"Error".  STEP 3|
00000110  20 20 20 20 20 20 41 66  74 65 72 20 74 68 65 20  |      After the |
00000120  74 68 72 6f 77 62 61 63  6b 20 77 69 6e 64 6f 77  |throwback window|
00000130  20 6f 70 65 6e 73 20 63  6c 69 63 6b 20 74 68 65  | opens click the|
00000140  20 62 75 74 74 6f 6e 20  6d 61 72 6b 65 64 0a 20  | button marked. |
00000150  20 20 20 20 20 20 20 20  20 20 20 20 20 22 54 68  |             "Th|
00000160  72 6f 77 62 61 63 6b 22  0a 20 20 53 54 45 50 20  |rowback".  STEP |
00000170  34 20 20 20 20 20 20 52  65 6d 65 6d 62 65 72 20  |4      Remember |
00000180  74 6f 20 63 6c 6f 73 65  20 74 68 65 20 74 68 72  |to close the thr|
00000190  6f 77 62 61 63 6b 20 77  69 6e 64 6f 77 2e 20 45  |owback window. E|
000001a0  61 63 68 20 73 75 63 68  20 77 69 6e 64 6f 77 0a  |ach such window.|
000001b0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 75 73  |              us|
000001c0  65 73 20 33 32 4b 20 6d  65 6d 6f 72 79 2e 0a 0a  |es 32K memory...|
000001d0  0a 46 6f 6f 74 6e 6f 74  65 73 3a 0a 2d 2d 2d 2d  |.Footnotes:.----|
000001e0  2d 2d 2d 2d 2d 2d 0a 20  20 20 20 20 20 20 20 20  |------.         |
000001f0  20 20 20 20 b9 20 41 6c  6c 20 45 72 72 6f 72 20  |    . All Error |
00000200  74 68 72 6f 77 62 61 63  6b 20 64 6f 65 73 20 69  |throwback does i|
00000210  73 20 74 6f 20 61 75 74  6f 6d 61 74 65 20 74 68  |s to automate th|
00000220  65 20 70 72 6f 63 65 73  73 3a 0a 0a 20 20 20 20  |e process:..    |
00000230  20 20 20 20 20 20 20 20  20 20 20 8f 20 4f 70 65  |           . Ope|
00000240  6e 20 61 6e 20 65 64 69  74 6f 72 20 77 69 6e 64  |n an editor wind|
00000250  6f 77 20 63 6f 6e 74 61  69 6e 69 6e 67 20 74 68  |ow containing th|
00000260  65 20 6f 66 66 65 6e 64  69 6e 67 20 70 72 6f 67  |e offending prog|
00000270  72 61 6d 0a 20 20 20 20  20 20 20 20 20 20 20 20  |ram.            |
00000280  20 20 20 8f 20 54 68 65  6e 20 70 72 65 73 73 20  |   . Then press |
00000290  74 68 65 20 22 47 4f 20  54 4f 22 20 6b 65 79 20  |the "GO TO" key |
000002a0  46 35 0a 20 20 20 20 20  20 20 20 20 20 20 20 20  |F5.             |
000002b0  20 20 8f 20 54 79 70 65  20 69 6e 20 74 68 65 20  |  . Type in the |
000002c0  28 6c 6f 67 69 63 61 6c  29 20 6e 75 6d 62 65 72  |(logical) number|
000002d0  20 6f 66 20 74 68 65 20  6f 66 66 65 6e 64 69 6e  | of the offendin|
000002e0  67 20 6c 69 6e 65 0a 20  20 20 20 20 20 20 20 20  |g line.         |
000002f0  20 20 20 20 20 20 8f 20  50 72 65 73 73 20 74 68  |      . Press th|
00000300  65 20 22 4f 4b 22 20 62  75 74 74 6f 6e 20 28 65  |e "OK" button (e|
00000310  71 75 69 76 61 6c 65 6e  74 20 74 6f 20 70 72 65  |quivalent to pre|
00000320  73 73 69 6e 67 20 52 45  54 55 52 4e 29 0a 20 20  |ssing RETURN).  |
00000330  20 20 20 20 20 20 20 20  20 20 20 20 20 8f 20 4d  |             . M|
00000340  61 72 6b 20 74 68 65 20  6c 69 6e 65 0a 20 20 20  |ark the line.   |
00000350  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00000360  20 20 20 20 0a 20 20 20  20 20 20 20 20 20 20 20  |    .           |
00000370  20 20 20 20 45 72 72 6f  72 20 74 68 72 6f 77 62  |    Error throwb|
00000380  61 63 6b 20 73 65 6e 64  73 20 74 68 65 20 61 70  |ack sends the ap|
00000390  70 72 6f 70 72 69 61 74  65 20 63 6f 6d 6d 61 6e  |propriate comman|
000003a0  64 73 20 74 6f 20 70 65  72 66 6f 72 6d 0a 20 20  |ds to perform.  |
000003b0  20 20 20 20 20 20 20 20  20 20 20 20 20 74 68 69  |             thi|
000003c0  73 2e 20 49 74 20 77 6f  72 6b 73 20 77 69 74 68  |s. It works with|
000003d0  20 6d 6f 73 74 20 65 64  69 74 6f 72 73 20 77 68  | most editors wh|
000003e0  69 63 68 20 63 6f 6e 66  6f 72 6d 20 74 6f 20 74  |ich conform to t|
000003f0  68 65 0a 20 20 20 20 20  20 20 20 20 20 20 20 20  |he.             |
00000400  20 20 22 73 74 61 6e 64  61 72 64 22 20 63 6f 6e  |  "standard" con|
00000410  66 69 67 69 67 75 72 61  74 69 6f 6e 73 20 6f 66  |figigurations of|
00000420  20 66 75 6e 63 74 69 6f  6e 20 6b 65 79 73 20 65  | function keys e|
00000430  74 63 2e 20 45 2e 67 2e  0a 20 20 20 20 20 20 20  |tc. E.g..       |
00000440  20 20 20 20 20 20 20 20  20 20 20 20 0a 20 20 20  |            .   |
00000450  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00000460  20 20 20 20 20 20 20 20  20 8f 20 21 45 64 69 74  |         . !Edit|
00000470  0a 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |.               |
00000480  20 20 20 20 20 20 20 20  20 20 20 20 20 8f 20 21  |             . !|
00000490  53 74 72 6f 6e 67 45 64  20 20 28 54 65 73 74 65  |StrongEd  (Teste|
000004a0  64 20 76 65 72 73 69 6f  6e 20 32 2e 35 30 29 0a  |d version 2.50).|
000004b0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
000004c0  20 20 20 20 20 20 20 20  20 20 20 20 8f 20 21 44  |            . !D|
000004d0  65 73 6b 45 64 69 74 20  20 28 54 65 73 74 65 64  |eskEdit  (Tested|
000004e0  20 76 65 72 73 69 6f 6e  20 32 2e 30 32 29 0a 0a  | version 2.02)..|
000004f0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
00000500  55 6e 66 6f 72 74 75 6e  61 74 65 6c 79 20 74 68  |Unfortunately th|
00000510  72 6f 77 62 61 63 6b 20  64 6f 65 73 20 6e 6f 74  |rowback does not|
00000520  20 77 6f 72 6b 20 77 69  74 68 20 74 68 65 0a 20  | work with the. |
00000530  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 65  |               e|
00000540  78 63 65 6c 6c 65 6e 74  20 65 64 69 74 6f 72 20  |xcellent editor |
00000550  21 5a 61 70 20 28 74 65  73 74 65 64 20 76 65 72  |!Zap (tested ver|
00000560  73 69 6f 6e 20 30 2e 38  30 29 0a 20 20 20 20 20  |sion 0.80).     |
00000570  20 20 20 20 20 20 20 20  20 20 0a 0a              |          ..|
0000057c