SK-NET FDDI

@0083.ADF - SK-NET FDDI-xM/FDDI Network Adapter
Drivers (to another page)
skfmdiag.zip   Hardware Diagnostic Program for DOS 
fddiboot.zip Remote Boot ROM image for NetWare IPX. 

On-Line User Manual for the FDDI Family
PDF User's Manual 

Am79C864A Datasheet Physical Layer Controller With Scrambler (PLC-S)
AM79C830A Datasheet  Supernet 2 (?) FORMAC Plus
Implementing FDDI Over Copper
Buffer Size for FDDI
FDDI on Copper with AMD PHY Components

SK-NET FDDI-UM Copper RJ-45 connector SAS (Single Attachment Station)
SK-5241 FDDI-FM Fiber MIC connector SAS (Single Attachment Station)
SK-5242 FDDI-FM DAS Fiber 2 MIC connectors DAS (Dual Attachment Station)
      Same as FDDI-FM with addition of daughtercard

ADF Sections


SK-5221 FDDI UM

D1 Green and Amber LEDs
J6 Daughtercard?
U1 STP interface
U2 Actel A1020B PQ100C
U8 MASTR
U10-13 CYC199-20VC [128KB RAM]
U14 HSREQ
U19 DECOD
U27 50.000 MHz osc
U30 Actel A1020B-2 PC100C
U33 BUFF
U34 MEMDC
U35 IOD2
U36 CLOCK
U38 AM79865  PDT
U39 AM79866A  PDR
U42 IOCNT
U44 IOD1
U49 COMPT
U51 ARBIT
U41 ES2 SKNETFE 3354 208
U43 AM79C830AKC   FORMAC Plus
U47 AM79C864AKC   PLC-S
U52 OKI M82C54-2
X 40.0000 MHz osc

AMD SUPERNET 2 FDDI chip set.
  Am79C830 - FORMAC Plus - (FDDI MAC layer)
  Am79C864 - PLC-S - FDDI Physical Layer Controller with Scrambler
  Am79865 - PDT - FDDI Physical Data Transmitter (transmit clock chip)
  Am79866 - PDR - FDDI Physical Data Receiver (receive clock chip)
OKI M82C54-2 CMOS PROGRAMMABLE INTERVAL TIMER

LEDs Green and Amber
Green on - Card initialized, SMT running, connected to network. May be problems at higher level protocol layers, but card can communicate with other stations.
Amber on - Card initialized and SMT running, card NOT connected to network. Possibly cable troubles or neighboring station is down.
Green and Amber Off - No board driver has been loaded and SMT not running.

Note: When an SK-52xx is used in a 16-bit slot, the SK-52xx can only access the first 16MB of RAM and may not work properly in systems with more memory.



AdapterID 0083 "SK-NET FDDI-FM/FDDI Network Adapter"

I/O Port Address Location
   Each FDDI adapter installed is assigned a unique address location.
    <"0200-03ff">, 0600-07ff, 0a00-0bff, 1200-13ff, 2200-23ff, 4200-43ff, 8200-83ff, fe00-ffff, fa00-fbff, f600-f7ff, ee00-efff, de00-dfff, be00-bfff, 7e00-7fff

Interrupt Level
   This adapter can operate on one of four interrupt levels: 3, 9, 10, or 11
    <"Interrupt 9">, 10, 11, 3

EPROM Address location
   There are 7 possible 16K blocks of PC memory that can be assigned for accessing the EPROM area of the FDDI Network adapter.
    <"EPROM Disabled">, C4000-C7FFF, C8000-CBFFF, CC000-CFFFF, D0000-D3FFF, D4000-D7FFF, D8000-DBFFF, DC000-DFFFF

Remote boot on/off
   Enables/disables booting from network.
     <"Remote boot on">, Remote boot off

Bus Master Arbitration Level
   Each Busmaster and/or DMA device is assigned an  unique arbitration level in order to arbitrate conflicting requests.
    <"Level 8">, 9, 10, 11, 12, 13, 14

Fairness on/off
   Each participant is assigned a priority by arbitration level .
      Fairness on:  Priority defines sequence of granting the bus on conflicting requests. The latency time on bus requests is calculable.
     Fairness off: Higher priority gives more time on the bus.  The latency time on bus requests is NOT calculable.
     <"Fairness ON">, Fairness OFF

Streaming data enable/disable
     <"Streaming data disable>, Streaming data enable

Check on forbidden 8-Bit accesses
   Working as busmaster the adapter supports accesses to 32-Bit and 16-Bit memory slaves. If the adapter performs an access to an 8-Bit slave an interrupt may be asserted and reported (check on) or not (check off).
    <"Check on">, Check off

Check CHCK
   Working as busmaster the adapter may check the control line 'CHCK'. If the check is enabled the adapter asserts an interrupt and reports this event.
   <"Check on">, Check off

Content created and/or collected by:
Louis Ohland, Peter Wendt, William Walsh, Kevin Bowling, Jim Shorney, Tim Clarke, David Beem, Tatsuo Sunagawa, Tomáš Slavotínek, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 11 Apr 2021 - Changes & Credits | Legal Info & Contact