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IBM 5160  -  One example of a [5000026][5000027] BIOS ROM set



5000026_5000027_1.jpg
U19:   • 8K x 8-bit
  • IBM part number 5000027
  • Supplied here as a Mostek MK37050N-4    (pinout: MK37000 series)





U18:   • 32K x 8-bit
  • IBM part number 5000026
  • Supplied here as a Mostek MK38022P-25    (pinout: MK38000 series)






Photo (left) source:
MicroCoreLabs at the Vintage Computer Forums



The (out of focus) image that was on the left was of the set owned by Tyler Durden.
After anaysis, I determined that the set above, owned by MicroCoreLabs, is the same set.
MicroCoreLabs agrees.