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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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tlb_w251.zip
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WHATSNEW.DOC
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1994-09-28
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WHAT'S NEW IN VERSION 2.51
o LASTBYTE.SYS: The new DMA test that was introduced in version
2.50 caused parity errors on some machines on subsequent
access to video or main bios; corrected.
WHAT'S NEW IN VERSION 2.50
FOREWORD
This version incorporates a large number of new features,
enhancements, and bug fixes. Perhaps most significant is the
comprehensive treatment of direct memory access (DMA),
including automatic detection of those memory controllers
that do not permit DMA in the upper memory area (UMA), a new
utility (HIGHDMA.SYS) that detects DMA access to the UMA, and
reworked versions of HIGHDRVR.SYS and HIGHTSR.EXE that work
around DOS's internal use of DMA when loading device drivers
and TSRs.
There are some things, however, that remain unfinished in
preference to getting this version out the door before a
planned vacation. Although a new low-level driver for the
NEC PowerMate is included, this driver still isn't quite
finished. (It works only if you add EXCLUDE=C800:32 to the
LASTBYTE.SYS command line.) In addition, we had hoped to
implement double buffering options in HIGHDMA.SYS to work
around all CD-ROM and disk DMA access to the UMA, but this
will have to wait for the next release.
Dan Lewis, owner
Key Software Products
o HIGHDMA.SYS: A new utility that watches for and notifies you
whenever DMA access of the upper memory area (UMA) has
occured. Some chipsets do not support such access, and DMA
can corrupt data when it occurs in the same 128k UMA region
as a 16-bit adapter. This utility helps to discover those
device drivers or TSR's which may need to be loaded low
because they use DMA.
o HIGHUMM.SYS: Added /SHRINK option to be used in conjunction
with the DOS=UMB option of MS-DOS. Reduces HIGHUMM resident
size to about 100 bytes. Also added XMS function 12h (Resize
a UMB memory block).
o HIGHDRVR.SYS, HIGHTSR.EXE: Would fail on those chipsets that
do not permit Direct Memory Access (DMA) into shadow ram
memory when the hi-loaded software was taken from a disk
whose controller uses DMA. All floppy disk (and some hard
WHAT'S NEW IN VERSION 2.51
disk) controllers use DMA. Corrected.
o HIGHDRVR.SYS: Previous versions of HIGHDRVR were unable to
successfully load some device drivers into upper memory (even
when DMA was not involved). The method that HIGHDRVR uses to
load drivers has been completely reworked, thus allowing
drivers like Lantastic's NDIS driver (RETH.DOS) to now be
loaded high.
o LASTBYTE.SYS, CHIPSET.EXE: Added support for the following
chipsets:
ATMEL AT40410
EFAR EC802G
Forex FRX46C401, FRX46C521, and FRX58C601
Intel 82424 and 82434 (see Foreword above)
Intel 386SL, 486SL, and 486SLz CPU's (with
shadow ram controller built into CPU chip)
NEC PowerMate 286 Laptop (see Foreword above)
OPTi 82C495XLC, 82C547, 82C691, 82C693, and 82C895
VIA Technologies VT82C486 and VT82C496
o LASTBYTE.SYS: Now you may use a "DOS=" option (in addition to
the normal "HOLE=" option) to specify a region of usable
read-only memory when you have a chipset that forces the main
bios shadow ram to be read-only.
o LASTBYTE, HIGHSPLR, HIGHAPND: Now puts all or most of their
code into read-only memory if available. (LASTBYTE and
HIGHSPLR have a /NOSPLIT option to prevent this.) The shadow
ram in the main bios region (F000-FFFF) on some chipsets is
read-only; you may be able to make some part of this memory
available using a "HOLE=" or "DOS=" option.
o HIGHMEM.EXE: Reorganized the on-screen information to improve
readability. Now indicates if your chipset supports Direct
Memory Access (DMA) in the upper memory area (UMA), if a
portion of shadow ram memory is read-only, regions of the UMA
in which usable memory is not available, and whether or not
DMA into a region is endangered by the presence of a 16-bit
adapter.
o LASTBYTE.SYS, CHIPSET.EXE: Added detection of the 486SX2 and
486DX4 cpu's. The old code (which did not detect these
cpu's) would hang if either of these cpu's were present.
o HIGHDRVR.SYS, HIGHDISK.SYS: These two device drivers now only
leave their 32-byte "stub" in conventional memory if
necessary; you may override their automatic choice with
either /STUB=0 (use no stub), or /STUB=1 (force use of
stub).
WHAT'S NEW IN VERSION 2.51
o LASTBYTE.SYS: Extended the TRACE options to include a third
form, TRACE=<interrupt vector list>, to trace a selected
subset of the main bios interrupt vectors.
o HIGHDUBL.SYS: Added a /FORCE option. HIGHDUBL checks if DOS
is later than version 6.20; if so, then it assumes that you
are using the new DriveSpace Disk Compression instead of the
older DoubleSpace. Since HIGHDUBL can only be used with
DoubleSpace, it will issue an error message if the DOS
version is later than 6.20. Since it is possible, however,
to use DoubleSpace with the newer versions of DOS, you can
force HIGHDUBL to bypass the version check with the /FORCE
option.
o INSTALL.EXE: Now checks to see if using DriveSpace Disk
Compression. If so, then it recommends using the
DEVICEHIGH/LOADHIGH approach instead of the HIGHDRVR/HIGHTSR
approach.
o LASTBYTE.SYS: All Bios ROM's were supposed to be
automatically copied into shadow ram if already shadowed.
This did not happen for the main bios if the chipset was one
(like OPTi) that forces the main bios shadow ram to be
read-only; corrected.
o SEVERAL MODULES: If HIGHUMM was used with DOS=UMB, subsequent
use of HIGHTSR, HIGHENV, HIGHKEY, etc., would sometimes fail
thinking that there was no upper memory available;
corrected.
o LASTBYTE.SYS: Discovered that if the video bios region
(C000-C7FF) is made cacheable on the OPTi 82C495SLC chipset,
then writes to that region are not reliable even if it is NOT
write-protected. The low-level physical driver now tests for
this problem, and disables video bios caching if necessary.
o INSTALL.EXE: Existing "INSTALL=HIGHTSR.EXE ..." in CONFIG.SYS
was incorrectly converted into INSTALL=HIGHTSR.SYS;
corrected. Existing HIGHTSR commands in AUTOEXEC.BAT were
sometimes not converted to new TLBMM directory; corrected.
LOADHIGH and LH commands were not properly converted to
HIGHTSR commands; corrected. Added /REPLACE option to
DEVICE=HIGHUMM.SYS (and /SHRINK option when used with
DOS=UMB).
o LASTBYTE.SYS: MOVE=TABLES would fail on Super VGA with error
message, "HOLE option outside of shadow ram"; corrected.
o SEVERAL MODULES: Internal test to identify 386SL/486SL cpu
interfered with one or more memory controller types;
WHAT'S NEW IN VERSION 2.51
corrected.
o LASTBYTE.SYS: Corrected a bug that was overwriting some
static data with the result that warm boots (Ctrl-Alt-Del)
that were converted to cold boots (due to DOS=F000:32, etc.)
would hang.
o LASTBYTE.SYS: Use of a TRACE option on a machine without an
EGA or VGA video adapter would cause the error message,
"Can't locate video bios entry point"; corrected.
o LASTBYTE.SYS: The low-level driver for the Via Technologies
VT82C470/475/495 had reversed the control for the EXXX and
FXXX shadow regions, and did not correctly implement the test
for relocated shadow ram memory; corrected.
o CHIPSET.EXE: The tests for all Via chipsets would hang;
corrected.
o LASTBYTE.SYS: The OPTi 82C597 low-level driver that caused
LASTBYTE.SYS to hang if an EXCLUDE option was used;
corrected.
o CHIPSET.EXE: Test for Headland HT12 hung on machine with HT12
chipset; corrected.
o CHIPSET.EXE: Test for Forex FRX46C421 returned false negative
result; corrected.
o LASTBYTE.SYS: Low-level driver for Headland HT12 did not
reduce extended memory properly by the amount that was used
for upper memory; corrected.
o LASTBYTE.SYS, CHIPSET.EXE: Reported clock speed of Pentium
was low; corrected.