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setpatch_readme
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1993-11-11
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Copyright (C) 1993 Commodore Electronics Ltd.
The following information may only be reproduced and used in accordance
with the requirements and limitations set forth below. This information
may be used by licensees of Amiga DOS in combination with their lawful
use of licensed copies of Amiga DOS. Reproduction of this information
is limited to that reasonably required for the use of AmigaDOS in
accordance with such license. All reproduction of this information,
in whole or in part, must retain this copyright notice as well as the
warranty disclaimers and limitation of liability as set forth below.
All Other Rights are Reserved.
Commodore makes no warranties or representations, either express, or implied,
with respect to the information set forth herein, which information is being
supplied on an "AS IS" basis, expressly subject to change without notice.
The entire risk as to the use of this information is assumed by the user.
IN NO EVENT WILL COMMODORE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY CLAIM ARISING OUT OF THE
INFORMATION PRESENTED HEREIN, EVEN IF IT HAS BEEN ADVISED OF THE
POSSIBILITIES OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE LIMITATION
OF IMPLIED WARRANTIES OR DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY.
SetPatch (c) Copyright 1990-1993, Commodore-Amiga, Inc. All Rights Reserved.
SetPatch 40.14 is designed to improve system operation of the Amiga
computer with Amiga DOS 2.1 (V38) through 3.1 (V40). The Update_SetPatch
icon or shell-script is designed to automatically update the version of
SetPatch you are using. If you already have an up-to-date SetPatch,
Update_SetPatch will inform you of that fact and not replace SetPatch.
The key features of this version of SetPatch are:
o Fixes problem of A2 and A6 being trashed by V40 WriteChunkyPixels()
o Does not open nonvolatile.library if not already loaded
o Fixes problem of d7 register being trashed by BltBitMap() after an
interleaved blit with a mask of -1.
o Fixes BestModeIDA() when passed a BIDTAG_MonitorID of DEFAULT_MONITOR_ID
(this was returning INVALID_ID)
o On A3000 with SCRAM memory and 68040 processor running 37.175,
turns off Page mode (shouldn't have been on).
o New NOAGA keyword so bootable applications which want the patches
but are incompatible with the AA chipset can still use the SetPatch.
o Several additional patches for CD32 subsystems such as cd.device
and nonvolatile.library which are applied if these subsystems
are present.
These features of V39 SetPatch are included:
o Activates AA chips if present (all SetPatches V39 and higher do this).
o On some systems, NMI interrupts could be caused due to hardware
bugs. These NMIs can cause software/hardware to perform incorrectly
and has caused major performance problems in some systems.
In the V37 ROM, the NMI vector pointed at a generalized routine
that saved all registers, does some work which ends up doing nothing,
restores all registers, and exits. This patch will, under V37 ROMs,
move that vector to point directly at an RTE.
o SetPatch no longer reads the longword after the end of each of
its hunks.
o Now checks for the CPU type before trying to open the 68040.library
This is so that the library does not even get loaded if you don't
need it. (The 68040.library also does the check.)
o Does not turn on the caches if the intruction cache is not
already on. This is such that the bootmenu option will not
be "undone" by SetPatch.
This SetPatch also incorporates the following patches from 37.38 and
earlier SetPatches which are applied as required, depending on the
version of the OS:
o On certain 68000-based Amigas, some software which would fail with an
alert number of 80000003 is now made to work.
o Many older external floppy drives which might have had problems
under 2.04 now work.
o Setpatch opens the 68040.library and reports the fact that it did
that. The 68040 library will only open on systems equipped with a
68040 CPU.
o The IDE driver in the A600 compensates for an internal cache problem
with Conner CP2024 hard drives.
o On A3000 machines that have 68040 CPUs and are running the 37.175
version of the ROM OS, and have SCRAM memory, page mode operation is
turned off.
o CIA interrupt servers are moved to priority 0 if they are lower than
priority 0.
o Patches console.device CMD_CLEAR to set up registers correctly.
o Patch to remove potential deadlock condition between console device
and Intuition's DisplayBeep().
o Patch to properly flush buffered file handles which have never been
read from.
o Blitter interrupts can be erroneously turned on during system
initialization. SetPatch forces them off.
o The slop area for high density floppies is now correctly
initialized. This fixes problems when switching between high and
low density disks on a high-density drive.
o The IAddress field of IDCMP_MOUSEMOVE and IDCMP_MOUSEBUTTONS
IntuiMessages now has 1.3-compatible values. This fixes some
programs which are erroneously attempting to extract a GadgetID
from non-gadget-related IntuiMessages. Such programs crash
on 68000-based Amigas with a guru number 80000003.
o The line-A exception entry can be inadvertently altered by the ROMs.
SetPatch corrects this.
o The V37.175 ROM does not unpack the monitor data from the ROM
correctly. This is corrected by first checking if the monitor
exists and returning bad mode ID return codes if it does not.
o Open() of paths more than 128 characters long now works.
o The SIGF_SINGLE signal bit is now cleared before allowing an open of
scsi.device to proceed. Certain versions of scsi.device fail to
clear that signal before using it.
o Patch to fix some holes in the SharedSemaphore routines.
o Fixes some applications using certain inappropriate functions such
as SetRGB4() from within an interrupt.
o The 2000 microsecond waits from trackdisk are increased to 3000
microseconds, in order to allow older A1010 drives to work under 2.0.
o The level-7 interrupt vector is pointed at an RTE instruction, for
efficiency.