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README.3SW
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1996-01-30
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README.3SW
BACKGROUND:
The 3COM 3C562 Lan+Modem PC Card requires that the modem
function and the LAN function share one hardware interrupt.
The IBM COM driver for OS/2, however, takes exclusive control
of the interrupt, making interrupt sharing impossible. For
this reason, a 3C562 Card installed under OS/2 can have only
one function active at a time.
3SWITCH is an OS/2 application that switches the active
function of the card between LAN and MODEM. It runs after
the system boots and lets you switch to the desired function
immediately without rebooting the system.
ENVIRONMENTS SUPPORTED:
3SWITCH supports several different NDIS and ODI environments:
- Systems with only the IBM LAN Requester installed.
- Systems with only the Novell Netware Requester installed.
- Systems with both ODI and ODINSUP.SYS drivers installed
(ODINSUP environments).
- Systems with both NDIS and ODI2NDI drivers installed
(NDI2ODI environments).
USING 3SWITCH:
To change operating modes with 3SWITCH, type 3SWITCH and press RETURN.
If the card is in LAN mode, it will change to MODEM. If the card is
in MODEM mode, it will change to LAN.
3SWITCH recognizes four command line parameters:
1. L (LAN): Type 3SWITCH LAN (or 3SWITCH L) and press RETURN
to always switch to LAN mode.
2. M (MODEM):Type 3SWITCH MODEM (or 3SWITCH M) and press RETURN
to always switch to MODEM mode.
3. S (STATUS): Type 3SWITCH STATUS (or 3SWITCH S) and press RETURN
to display the currently active mode and the card configuration information.
4. H (HELP): Type 3SWITCH HELP (or 3SWITCH H) and press RETURN
to display the help text.
RESTRICTIONS:
- For both NDIS and ODI drivers to work properly, the COM.SYS driver needs
to be loaded beforehand. Or else, the system may hang. Please check your
config.sys file, and see if the device=\..\ 3CELPC.SYS (OS2 ODI driver) or ELPC3X.OS2
(OS2 NDIS driver) is after the device=\..\COM.SYS.
- When using 3SWITCH, you can invoke only one instance at a time. You
can change functions freely, but do not run 3SWITCH again until after
any previous 3SWITCH operation completes.
- While switching from LAN to MODEM in an ODI environment, it takes
about 20 seconds for the system to shut down the network connection.
During this time, you can change to or open other applications, but
you may not invoke a new command prompt or open a new command window.