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/lib/firmware/cis/src/PE-200.cis is in linux-firmware 1.127.24.

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#
# Replacement CIS for PE-200 ethernet card
#
vers_1 4.1, "PMX   ", "PE-200", "ETHERNET", "R01"
funcid network_adapter [post] [rom]
config base 0x0100 mask 0x0001 last_index 0x01
cftable_entry 0x1 [default]
  [mwait]
  Vcc Vnom 5V
  irq mask 0xffff [level]
  io 0x0000-0x000f, 0x0010-0x001f [8bit] [16bit]