home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Magnum One
/
Magnum One (Mid-American Digital) (Disc Manufacturing).iso
/
d2
/
tlb_v117.arc
/
WHATSNEW.117
< prev
Wrap
Text File
|
1990-12-21
|
3KB
|
70 lines
WHAT'S NEW IN VERSION 1.17
--------------------------
- Added support for Expanded Memory as an alternative to a memory
controller chip; added the "EMS3", "EMS4", "EEMS", and "NOFRAME"
override options to the command line options.
- Now any 386sx, 386, or 486 can use LASTBYTE, even if you don't have
the "necessary" hardware! Simply use the Windows 3.0 version of
EMM386.SYS to implement Expanded Memory, and then use it to install
LASTBYTE:
DEVICE=EMM386.SYS
DEVICE=LASTBYTE.SYS
If you don't need expanded memory for any other reason, then add
the following command line options:
DEVICE=EMM386.SYS 176
DEVICE=LASTBYTE.SYS NOFRAME
"NOFRAME" basically disables further use of Expanded Memory so that
TSR's and device drivers may be stored in the expanded memory page
frame without fear of being swapped out by other software. The
number 176 limits the size of Expanded Memory to 176kb. The actual
number may vary on your machine, but it is a way to use no more
Extended Memory for LASTBYTE than the minimum required.
* * * IMPORTANT * * *
The NOFRAME option is intentionally enabled for EMS4 and
EEMS (as well as for EMS3) in this release as a temporary
solution to a problem that occurs when these options are
used in conjunction with certain programs that use expanded
memory. This limitation will be eliminated in the next
release.
- Modified bandwidth measurement routine to repeatedly read first 4
bytes of target area rather than reading the first 1KB. Some disk
controllers with memory-mapped i/o were apparently intolerant of the
latter approach, causing the system to hang on boot.
- Modified read/write test of chips and ram memory to be less invasive.
- Modified the memory allocation algorithm for EMS page frame and
TSR markers are placed at the top of an available block rather than
the bottom, like ram disk memory and EMS pages.
- Added a "?" option to the CHIPSET command line to display the list
of supported devices.
- Added support for Texas Instruments Single-Chip TACT82411. This
chip is "functionally" equivalent to the Chips and Technologies
NEAT chipset, but unlike the latter, most of the configuration
registers in the TI device are write-only. This causes the
automatic detection of a NEAT chipset to fail, and requires using
the "82411" override option on the LASTBYTE.SYS command line.
- Repaired a bug in the hardware signature computation where it tests
for the presence of a numeric coprocessor. This bug would
sometimes cause a PC to hang, either when running the LICENSE.EXE
program or when installing LASTBYTE.SYS during the processing of
CONFIG.SYS.
- Repaired several bugs having to do with support of the VLSI
Technologies 82C202 chip.