Hi
Not sure what you mean exactly by BIOS but on the 6500 run the following command
"sh module"
Output from one of your 6500's. Note FWSM is in slot 7
=============================================
SZ-JFH-F00-DTE1#sh mod
Mod Ports Card Type Model Serial No.
--- ----- -------------------------------------- ------------------ -----------
3 16 SFM-capable 16 port 1000mb GBIC WS-X6516-GBIC SAL0728G7ZE
5 2 Supervisor Engine 720 (Active) WS-SUP720-BASE SAD083703U6
6 4 CSM with SSL WS-X6066-SLB-S-K9 SAD083100RY
7 6 Firewall Module WS-SVC-FWM-1 SAD085008T7
8 48 SFM-capable 48 port 10/100/1000mb RJ45 WS-X6548-GE-TX SAD073803J8
9 1 Application Control Engine Module ACE10-6500-K9 SAD11300050
Mod MAC addresses Hw Fw Sw Status
--- ---------------------------------- ------ ------------ ------------ -------
3 000d.29fe.5f70 to 000d.29fe.5f7f 5.5 6.3(1) 8.5(0.46)RFW Ok
5 0011.21a1.2cfc to 0011.21a1.2cff 3.1 8.1(3) 12.2(18)SXF6 Ok
6 0012.0060.5d50 to 0012.0060.5d57 1.1 2.1(4) Ok
7 0003.3235.a340 to 0003.3235.a347 3.0 7.2(1) 2.3(2) Ok
8 000d.65ea.1310 to 000d.65ea.133f 5.0 7.2(1) 8.5(0.46)RFW Ok
9 001c.5843.f0fc to 001c.5843.f103 1.6 8.6(0.252-En 3.0(0)A1(3b) Ok
Mod Sub-Module Model Serial Hw Status
---- --------------------------- ------------------ ----------- ------- -------
=============================================
so for example our FWSM software version is 2.3(2)
HTH
Jon