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Patch/ThePatch/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.

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Filename: Patch/ThePatch/ReadMe
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File contents
ReadMe for RISC OS 3.70 ROM Patches, 24-Oct-96
----------------------------------------------

Since release of the StrongARM upgrade and RISC OS 3.70, two minor
problems have been identified, and these are readily fixed with
the supplied simple patch utility.

Please read the following sections fully before using the patch.


Purpose of patches
------------------

The first problem occurs with the parallel port, when connected to
some Hewlett Packard printers. The symptom is that printing to file
is fine, but printing to the printer is extremely slow, or never
completes. With the patch, a wider range of Hewlett Packard printers
is supported.

The second problem can cause occasional errors with some
applications. This only affects RISC OS 3.70 when running on
StrongARM (SA110, revision less than 3). A typical symptom is an
occasional error including the message "No stack for trap handler".
However, remember that this rare problem is entirely unrelated to
errors caused by application incompatibility with RISC OS 3.70 or
with StrongARM.

For developers, there is technical information on the second problem,
and how it may affect their code, in the accompanying file, TechNote.
(Users can ignore TechNote.)


Installing the patches
----------------------

The patches are easily installed by copying the supplied Obey file
!!ROMPatch and the supplied directory (with contents) ROMPatch
into your

 !Boot.Choices.Boot.PreDesk

directory. To do this, open !Boot by holding down the Shift key
while double-clicking on !Boot. Next, double-click to open Choices,
then Boot, then Predesk. Now drag !!ROMPatch and ROMPatch into
Predesk.

Finally, restart your machine to activate the patches. You will
notice a new dynamic area 'ROM patches 3.70/1' in the task bar
display, if you click on the Acorn iconbar icon.


Distribution
------------

These patches may be freely distributed to others for use with RISC
OS 3.70, provided they are distributed unaltered and complete. The
complete distribution comprises:

  !!ROMPatch
  ReadMe      (this ReadMe file)
  ROMPatch    (and contents)
  TechNote

These patches must not be used with any other version of RISC OS.

00000000  0a 52 65 61 64 4d 65 20  66 6f 72 20 52 49 53 43  |.ReadMe for RISC|
00000010  20 4f 53 20 33 2e 37 30  20 52 4f 4d 20 50 61 74  | OS 3.70 ROM Pat|
00000020  63 68 65 73 2c 20 32 34  2d 4f 63 74 2d 39 36 0a  |ches, 24-Oct-96.|
00000030  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
*
00000050  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 0a 0a  |--------------..|
00000060  53 69 6e 63 65 20 72 65  6c 65 61 73 65 20 6f 66  |Since release of|
00000070  20 74 68 65 20 53 74 72  6f 6e 67 41 52 4d 20 75  | the StrongARM u|
00000080  70 67 72 61 64 65 20 61  6e 64 20 52 49 53 43 20  |pgrade and RISC |
00000090  4f 53 20 33 2e 37 30 2c  20 74 77 6f 20 6d 69 6e  |OS 3.70, two min|
000000a0  6f 72 0a 70 72 6f 62 6c  65 6d 73 20 68 61 76 65  |or.problems have|
000000b0  20 62 65 65 6e 20 69 64  65 6e 74 69 66 69 65 64  | been identified|
000000c0  2c 20 61 6e 64 20 74 68  65 73 65 20 61 72 65 20  |, and these are |
000000d0  72 65 61 64 69 6c 79 20  66 69 78 65 64 20 77 69  |readily fixed wi|
000000e0  74 68 0a 74 68 65 20 73  75 70 70 6c 69 65 64 20  |th.the supplied |
000000f0  73 69 6d 70 6c 65 20 70  61 74 63 68 20 75 74 69  |simple patch uti|
00000100  6c 69 74 79 2e 0a 0a 50  6c 65 61 73 65 20 72 65  |lity...Please re|
00000110  61 64 20 74 68 65 20 66  6f 6c 6c 6f 77 69 6e 67  |ad the following|
00000120  20 73 65 63 74 69 6f 6e  73 20 66 75 6c 6c 79 20  | sections fully |
00000130  62 65 66 6f 72 65 20 75  73 69 6e 67 20 74 68 65  |before using the|
00000140  20 70 61 74 63 68 2e 0a  0a 0a 50 75 72 70 6f 73  | patch....Purpos|
00000150  65 20 6f 66 20 70 61 74  63 68 65 73 0a 2d 2d 2d  |e of patches.---|
00000160  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 0a  |---------------.|
00000170  0a 54 68 65 20 66 69 72  73 74 20 70 72 6f 62 6c  |.The first probl|
00000180  65 6d 20 6f 63 63 75 72  73 20 77 69 74 68 20 74  |em occurs with t|
00000190  68 65 20 70 61 72 61 6c  6c 65 6c 20 70 6f 72 74  |he parallel port|
000001a0  2c 20 77 68 65 6e 20 63  6f 6e 6e 65 63 74 65 64  |, when connected|
000001b0  20 74 6f 0a 73 6f 6d 65  20 48 65 77 6c 65 74 74  | to.some Hewlett|
000001c0  20 50 61 63 6b 61 72 64  20 70 72 69 6e 74 65 72  | Packard printer|
000001d0  73 2e 20 54 68 65 20 73  79 6d 70 74 6f 6d 20 69  |s. The symptom i|
000001e0  73 20 74 68 61 74 20 70  72 69 6e 74 69 6e 67 20  |s that printing |
000001f0  74 6f 20 66 69 6c 65 0a  69 73 20 66 69 6e 65 2c  |to file.is fine,|
00000200  20 62 75 74 20 70 72 69  6e 74 69 6e 67 20 74 6f  | but printing to|
00000210  20 74 68 65 20 70 72 69  6e 74 65 72 20 69 73 20  | the printer is |
00000220  65 78 74 72 65 6d 65 6c  79 20 73 6c 6f 77 2c 20  |extremely slow, |
00000230  6f 72 20 6e 65 76 65 72  0a 63 6f 6d 70 6c 65 74  |or never.complet|
00000240  65 73 2e 20 57 69 74 68  20 74 68 65 20 70 61 74  |es. With the pat|
00000250  63 68 2c 20 61 20 77 69  64 65 72 20 72 61 6e 67  |ch, a wider rang|
00000260  65 20 6f 66 20 48 65 77  6c 65 74 74 20 50 61 63  |e of Hewlett Pac|
00000270  6b 61 72 64 20 70 72 69  6e 74 65 72 73 0a 69 73  |kard printers.is|
00000280  20 73 75 70 70 6f 72 74  65 64 2e 0a 0a 54 68 65  | supported...The|
00000290  20 73 65 63 6f 6e 64 20  70 72 6f 62 6c 65 6d 20  | second problem |
000002a0  63 61 6e 20 63 61 75 73  65 20 6f 63 63 61 73 69  |can cause occasi|
000002b0  6f 6e 61 6c 20 65 72 72  6f 72 73 20 77 69 74 68  |onal errors with|
000002c0  20 73 6f 6d 65 0a 61 70  70 6c 69 63 61 74 69 6f  | some.applicatio|
000002d0  6e 73 2e 20 54 68 69 73  20 6f 6e 6c 79 20 61 66  |ns. This only af|
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000002f0  37 30 20 77 68 65 6e 20  72 75 6e 6e 69 6e 67 20  |70 when running |
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00000350  72 72 6f 72 20 69 6e 63  6c 75 64 69 6e 67 20 74  |rror including t|
00000360  68 65 20 6d 65 73 73 61  67 65 20 22 4e 6f 20 73  |he message "No s|
00000370  74 61 63 6b 20 66 6f 72  20 74 72 61 70 20 68 61  |tack for trap ha|
00000380  6e 64 6c 65 72 22 2e 0a  48 6f 77 65 76 65 72 2c  |ndler"..However,|
00000390  20 72 65 6d 65 6d 62 65  72 20 74 68 61 74 20 74  | remember that t|
000003a0  68 69 73 20 72 61 72 65  20 70 72 6f 62 6c 65 6d  |his rare problem|
000003b0  20 69 73 20 65 6e 74 69  72 65 6c 79 20 75 6e 72  | is entirely unr|
000003c0  65 6c 61 74 65 64 20 74  6f 0a 65 72 72 6f 72 73  |elated to.errors|
000003d0  20 63 61 75 73 65 64 20  62 79 20 61 70 70 6c 69  | caused by appli|
000003e0  63 61 74 69 6f 6e 20 69  6e 63 6f 6d 70 61 74 69  |cation incompati|
000003f0  62 69 6c 69 74 79 20 77  69 74 68 20 52 49 53 43  |bility with RISC|
00000400  20 4f 53 20 33 2e 37 30  20 6f 72 0a 77 69 74 68  | OS 3.70 or.with|
00000410  20 53 74 72 6f 6e 67 41  52 4d 2e 0a 0a 46 6f 72  | StrongARM...For|
00000420  20 64 65 76 65 6c 6f 70  65 72 73 2c 20 74 68 65  | developers, the|
00000430  72 65 20 69 73 20 74 65  63 68 6e 69 63 61 6c 20  |re is technical |
00000440  69 6e 66 6f 72 6d 61 74  69 6f 6e 20 6f 6e 20 74  |information on t|
00000450  68 65 20 73 65 63 6f 6e  64 20 70 72 6f 62 6c 65  |he second proble|
00000460  6d 2c 0a 61 6e 64 20 68  6f 77 20 69 74 20 6d 61  |m,.and how it ma|
00000470  79 20 61 66 66 65 63 74  20 74 68 65 69 72 20 63  |y affect their c|
00000480  6f 64 65 2c 20 69 6e 20  74 68 65 20 61 63 63 6f  |ode, in the acco|
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000004a0  65 63 68 4e 6f 74 65 2e  0a 28 55 73 65 72 73 20  |echNote..(Users |
000004b0  63 61 6e 20 69 67 6e 6f  72 65 20 54 65 63 68 4e  |can ignore TechN|
000004c0  6f 74 65 2e 29 0a 0a 0a  49 6e 73 74 61 6c 6c 69  |ote.)...Installi|
000004d0  6e 67 20 74 68 65 20 70  61 74 63 68 65 73 0a 2d  |ng the patches.-|
000004e0  2d 2d 2d 2d 2d 2d 2d 2d  2d 2d 2d 2d 2d 2d 2d 2d  |----------------|
000004f0  2d 2d 2d 2d 2d 0a 0a 54  68 65 20 70 61 74 63 68  |-----..The patch|
00000500  65 73 20 61 72 65 20 65  61 73 69 6c 79 20 69 6e  |es are easily in|
00000510  73 74 61 6c 6c 65 64 20  62 79 20 63 6f 70 79 69  |stalled by copyi|
00000520  6e 67 20 74 68 65 20 73  75 70 70 6c 69 65 64 20  |ng the supplied |
00000530  4f 62 65 79 20 66 69 6c  65 0a 21 21 52 4f 4d 50  |Obey file.!!ROMP|
00000540  61 74 63 68 20 61 6e 64  20 74 68 65 20 73 75 70  |atch and the sup|
00000550  70 6c 69 65 64 20 64 69  72 65 63 74 6f 72 79 20  |plied directory |
00000560  28 77 69 74 68 20 63 6f  6e 74 65 6e 74 73 29 20  |(with contents) |
00000570  52 4f 4d 50 61 74 63 68  0a 69 6e 74 6f 20 79 6f  |ROMPatch.into yo|
00000580  75 72 0a 0a 20 21 42 6f  6f 74 2e 43 68 6f 69 63  |ur.. !Boot.Choic|
00000590  65 73 2e 42 6f 6f 74 2e  50 72 65 44 65 73 6b 0a  |es.Boot.PreDesk.|
000005a0  0a 64 69 72 65 63 74 6f  72 79 2e 20 54 6f 20 64  |.directory. To d|
000005b0  6f 20 74 68 69 73 2c 20  6f 70 65 6e 20 21 42 6f  |o this, open !Bo|
000005c0  6f 74 20 62 79 20 68 6f  6c 64 69 6e 67 20 64 6f  |ot by holding do|
000005d0  77 6e 20 74 68 65 20 53  68 69 66 74 20 6b 65 79  |wn the Shift key|
000005e0  0a 77 68 69 6c 65 20 64  6f 75 62 6c 65 2d 63 6c  |.while double-cl|
000005f0  69 63 6b 69 6e 67 20 6f  6e 20 21 42 6f 6f 74 2e  |icking on !Boot.|
00000600  20 4e 65 78 74 2c 20 64  6f 75 62 6c 65 2d 63 6c  | Next, double-cl|
00000610  69 63 6b 20 74 6f 20 6f  70 65 6e 20 43 68 6f 69  |ick to open Choi|
00000620  63 65 73 2c 0a 74 68 65  6e 20 42 6f 6f 74 2c 20  |ces,.then Boot, |
00000630  74 68 65 6e 20 50 72 65  64 65 73 6b 2e 20 4e 6f  |then Predesk. No|
00000640  77 20 64 72 61 67 20 21  21 52 4f 4d 50 61 74 63  |w drag !!ROMPatc|
00000650  68 20 61 6e 64 20 52 4f  4d 50 61 74 63 68 20 69  |h and ROMPatch i|
00000660  6e 74 6f 0a 50 72 65 64  65 73 6b 2e 0a 0a 46 69  |nto.Predesk...Fi|
00000670  6e 61 6c 6c 79 2c 20 72  65 73 74 61 72 74 20 79  |nally, restart y|
00000680  6f 75 72 20 6d 61 63 68  69 6e 65 20 74 6f 20 61  |our machine to a|
00000690  63 74 69 76 61 74 65 20  74 68 65 20 70 61 74 63  |ctivate the patc|
000006a0  68 65 73 2e 20 59 6f 75  20 77 69 6c 6c 0a 6e 6f  |hes. You will.no|
000006b0  74 69 63 65 20 61 20 6e  65 77 20 64 79 6e 61 6d  |tice a new dynam|
000006c0  69 63 20 61 72 65 61 20  27 52 4f 4d 20 70 61 74  |ic area 'ROM pat|
000006d0  63 68 65 73 20 33 2e 37  30 2f 31 27 20 69 6e 20  |ches 3.70/1' in |
000006e0  74 68 65 20 74 61 73 6b  20 62 61 72 0a 64 69 73  |the task bar.dis|
000006f0  70 6c 61 79 2c 20 69 66  20 79 6f 75 20 63 6c 69  |play, if you cli|
00000700  63 6b 20 6f 6e 20 74 68  65 20 41 63 6f 72 6e 20  |ck on the Acorn |
00000710  69 63 6f 6e 62 61 72 20  69 63 6f 6e 2e 0a 0a 0a  |iconbar icon....|
00000720  44 69 73 74 72 69 62 75  74 69 6f 6e 0a 2d 2d 2d  |Distribution.---|
00000730  2d 2d 2d 2d 2d 2d 2d 2d  2d 0a 0a 54 68 65 73 65  |---------..These|
00000740  20 70 61 74 63 68 65 73  20 6d 61 79 20 62 65 20  | patches may be |
00000750  66 72 65 65 6c 79 20 64  69 73 74 72 69 62 75 74  |freely distribut|
00000760  65 64 20 74 6f 20 6f 74  68 65 72 73 20 66 6f 72  |ed to others for|
00000770  20 75 73 65 20 77 69 74  68 20 52 49 53 43 0a 4f  | use with RISC.O|
00000780  53 20 33 2e 37 30 2c 20  70 72 6f 76 69 64 65 64  |S 3.70, provided|
00000790  20 74 68 65 79 20 61 72  65 20 64 69 73 74 72 69  | they are distri|
000007a0  62 75 74 65 64 20 75 6e  61 6c 74 65 72 65 64 20  |buted unaltered |
000007b0  61 6e 64 20 63 6f 6d 70  6c 65 74 65 2e 20 54 68  |and complete. Th|
000007c0  65 0a 63 6f 6d 70 6c 65  74 65 20 64 69 73 74 72  |e.complete distr|
000007d0  69 62 75 74 69 6f 6e 20  63 6f 6d 70 72 69 73 65  |ibution comprise|
000007e0  73 3a 0a 0a 20 20 21 21  52 4f 4d 50 61 74 63 68  |s:..  !!ROMPatch|
000007f0  0a 20 20 52 65 61 64 4d  65 20 20 20 20 20 20 28  |.  ReadMe      (|
00000800  74 68 69 73 20 52 65 61  64 4d 65 20 66 69 6c 65  |this ReadMe file|
00000810  29 0a 20 20 52 4f 4d 50  61 74 63 68 20 20 20 20  |).  ROMPatch    |
00000820  28 61 6e 64 20 63 6f 6e  74 65 6e 74 73 29 0a 20  |(and contents). |
00000830  20 54 65 63 68 4e 6f 74  65 0a 0a 54 68 65 73 65  | TechNote..These|
00000840  20 70 61 74 63 68 65 73  20 6d 75 73 74 20 6e 6f  | patches must no|
00000850  74 20 62 65 20 75 73 65  64 20 77 69 74 68 20 61  |t be used with a|
00000860  6e 79 20 6f 74 68 65 72  20 76 65 72 73 69 6f 6e  |ny other version|
00000870  20 6f 66 20 52 49 53 43  20 4f 53 2e 0a 0a        | of RISC OS...|
0000087e