PicLan Download FAQ
March 1, 1998
This is a difficult question to answer. PicLan version 188.8.131.52 was
just released (as of 3/1/98). This version is intended to consolodate
the PicLan software so that a single build is available on all platforms.
Unfortunately, this release is quite new, so whether you want to download
it may depend on your situation.
What version of PicLan should
In any case remember:
If you are a dealer or end-user that want's to load PicLan onto a test
system then you should download version 184.108.40.206. If you have any
problems, please email them to email@example.com.
If you need any of the new features in 220.127.116.11, then you should download
If you want to be running the latest code, then you should download 18.104.22.168.
Remember that this is a new release, so be careful with your data (test
network functions before going live, backup your data, etc.).
If you are going to load PicLan-IP, always load the latest PicLan and PicLan-IP
If you do not need any new features, are running a mission-critical production
system, and are generally paranoid, download a previous release.
After several weeks, if you do not see any new builds or technical notes
about 22.214.171.124, then using 126.96.36.199 should be safe.
You can always download the 188.8.131.52 and continue to use it with previous
2.0.0.x server releases.
Modular Software does not test PicLan releases on a large number
of systems nor do we test all configurations or functions. We also
do not WARRANT that the PicLan software will be error free or operate continuously.
Please test any production usage of PicLan before going live. Also,
be sure to BACK UP YOUR DATA.
You can use different builds of PicLan on your Pick server and workstation
client systems within limitations. The PicLan version number consists
Do I need the same version
of PicLan on all systems?
If the first three numbers match, then PicLan should work. This means
that a AP/Pro server running 184.108.40.206 will communicate with a Windows 95
workstation running 220.127.116.11, but not with a DOS workstation running 18.104.22.168.
A major release number
A minor release number
A client/server packet compatibility number
A build number
One install is designed to create diskettes, and the other is designed
to create an install directory. In either case, you end up with exactly
the same PicLan installation.
Why are there two DOS/Win client
installs that are the same version?
Remember the network install can be difficult to transfer from machine
to machine via floppy disk.
If you are test-loading a PicLan release, download the "network install".
This will save you from having to create diskettes.
If you are going to install PicLan onto a large number of production workstations,
you probably want to download the diskette install or both the network
install and the diskette install.
Yes. If you create four subdirectories named disk1, disk2,
disk3, and disk4 you can then copy the contents of each
install diskette to the appropriate directory. After the diskettes
are copies, you can run SETUP.EXE from the disk1 directory.
Can I copy the diskettes
from a client install set to a network directory?
There are two driver "types" for PicLan on the Alpha Microsystems Pick/64+
and General Automation Sequoia PRO platforms. Perhaps some historical
perspective would help here.
What is the difference between
a 16-bit PicLan driver and a 32-bit PicLan driver?
Pick/64+ version 2.2 was the first 32-bit flat-model Intel Pick implementation
that PicLan was ported to (previous PicLan release were real-mode Intel
releases like R83). The initial implemnetation method for the PicLan
driver was to build the PicLan driver as a 16-bit multi-segment protected-mode
driver. This 16-bit driver would run "inside" of the 32-bit flat-model
Pick/64+ release through 32/16 bit transition calls (or thunks). The main
reason the driver was ported this way was the tools that we had available
including the 'C' compiler (Borland) and the lack of a 32-bit fixup loader.
So which should you use. Both versions appear to be very stable.
If you need PCI or PicLan-IP support then you must use the 32-bit drivers.
Otherwise you can use either one. We would prefer that you use the
32-bit drivers in all cases. Again if you have any problems, please
Modular Software Corporation
24872 Nellie Gail Road
Laguna Hills, CA 92653
When AP/Pro and PC/OS came out, PicLan was ported to a true 32-bit driver
environment. This actually required a lot of work including designing
our own load/fixup file format, building a new debugging environment, using
a different 'C' compile (Watcom).
When support for PCI networking cards was implemented, this was inherently
a 32-bit project (PCI cards use a lot of 32-bit addressing internally).
As such, the 32-bit PCI driver was only implemented in 32-bit driver versions
Similarily, when PicLan-IP was developed, it was only integrated with
32-bit versions of PicLan. In fact, porting PicLan-IP's TCP/IP protocol
stacks back to 16-bit driver space is probably impossible because of the
size of the TCP/IP support layer. IPX PicLan support will fit completely
within a single 16-bit program segment (64K) whereas the TCP/IP stacks
in PicLan-IP are much larger.
The unavailability of PCI and PicLan-IP support in Pick/64+ and Sequoia
PRO was not well received by some dealers. For this reason, 32-bit
PicLan drivers were implemented for these two platforms. The 16-bit
drivers are still supported for the time being, but may be phased out in
the near future.