IBM Ethernet II 10Base2 Credit Card Adapter
Return to The Hardware Shelf
Last Updated: 11th February, 1995
Symptoms
- Installation aid fails to recognise presence of Card Services and Resource Map Utility that OS/2 Warp has installed.
- Traps during boot of OS/2 Warp when MAM is attached to card.
Exception in device driver: PCMCIA$ TRAP 000d ERRCD=0183 ERACC=10f3 ERLIM=000001ff EAX=00000000 EBX=fffff000 ECX=05800111 EDX=fdf00000 ESI=fdf0042e EDI=abcb014f EBP=00004e7e FLG=00010216 CS:EIP=0580:0000144e CSACC=009b CSLIM=00002cbd SS:ESP=0030:00004e7e SSACC=1097 SSLIM=00003fff DS=0650 DSACC=0093 DSLIM=0000044f CR0=8001001b ES=0a48 ESACC=0093 ESLIM=00000464 CR2=fff0701b FS=03b8 FSACC=00f3 FSLIM=00000023 GS=0000 GSACC=**** GSLIM=******** The system detected an internal processing error at location ##0160:fff5c34c - 000d:a34c 60000, 9084 048600b4 Internal Revision 8.162, 94/09/19 The system is stopped. Record all of the above information and contact your service representative.
Hardware
IBM ThinkPad 75x
IBM Ethernet II 10Base2 Credit Card Adapter (PN 0934315)
Software
IBM Credit Card Ethernet II Adapter Installation Diskette (v2.03)
IBM OS/2 Warp V3.0
Card Services (supplied with Warp)
5-10-94 22:56 41158 0 PCMCIA.SYS 23-09-94 5:41 1120 49 VPCMCIA.SYS 15-06-94 18:01 2493 0 AUTODRV2.INI 5-10-94 22:56 10862 0 AUTODRV2.SYS
Socket Services (supplied with Warp)
5-10-94 23:02 12861 0 IBM2SS01.SYS
Problem
Both symptoms result from using the Card and Socket Services drivers that are supplied with Warp. These drivers are not compatible with the Ethernet card &/or its drivers.
Procedure
Install the latest Card and Socket Services from IBM:
- Fetch UTTPS200.EXE from the IBM PC Company's FTP server: [[1]]
- Run the self extracting zip
- Make the 2nd disk:
LOADDSKF UTTP20-2.DSK A:
- Run the installation program PCMINST2.EXE
- Check that similar lines to the following are at or near the bottom of CONFIG.SYS.
DEVICE=\THINKPAD\PCMCIA.SYS DEVICE=\THINKPAD\VPCMCIA.SYS DEVICE=\THINKPAD\AUTODRV2.SYS \THINKPAD\AUTODRV2.INI DEVICE=\THINKPAD\IBM2SS01.SYS /C1=9
Notes
Aside from the problems above, I also experienced failure of the loopback diagnostic test. The manual that accompanies the card suggests replacing the card. I did this and experienced the same problem. It turned out that the problem was actually a dud 50 ohm terminator (not supplied by IBM). When I replaced the 50 ohm terminator, the loopback test passed.
So, if the loopback diagnostics fail for you, check your T-connectors and terminators. If you have spares handy, try them. If you don't, use a multimeter to check the resistance between the core and the case of the T-connector when both the terminators are attached to it. A good set of terminators and T-connector will measure 25 ohms (e.g. half of 50 ohms). If it measures 50 ohms, either the T-connector, or one of the terminators needs to be replaced.
Finally, people new to Ethernet cabling (such as myself!) may not realise that the following cabling configuration for a 2 machine network is incorrect, even though it makes sense "geometrically".
WRONG:
F---- Coax Cable ----F | | M M Card Card Where: M - male coax connector F - female coax connector
T-connectors must be used. The reason is that a thin coax cable needs a 50 ohm load on each end. This can only be achieved if T-connectors are used.
RIGHT:
T M+M F---- Coax Cable ----F M+M T F F | | M M Card Card Where: M - male coax connector F - female coax connector T - 50 ohm terminator M+M - T-connector F
By Jon Seymour
Return to The Hardware Shelf