6
Fast block move operation for load/unload:
CPU sees packet bytes as if stored
contiguously
Handles 16 bit transfers regardless of
address alignment
Access to packet through fixed window
Fast bus interface:
Compatible with ISA type and faster buses
Flexibility:
Flexible packet and header processing:
Can be set to Simultasking - Early
Receive and transmit modes
Can access any byte in the packet
Can immediately remove undesired
packets from queue
Can move packets from receive to
transmit queue
Can alter receive processing order
without copying data
Can discard or enqueue again a failed
transmission
Resource allocation:
Memory dynamically allocated for transmit
and receive
Can automatically release memory on
successful transmission
Configuration:
ISA:
Uses non-volatile jumperless setup via
serial EEPROM
PCMCIA:
Uses serial EEPROM for attribute
memory storage. PCMCIA I/O ignores
address lines A4-A15 and relies on the
PCMCIA host, decoding for the slot
nROM/nPCMCIA on the SMC91C95 is left
open with a pullup for ISA mode. This pin
is sampled at the end of Power On Reset.
If found low, the SMC91C95 is configured
for PCMCIA mode.
