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IBM 5160  -  Some examples of [5000026][5000027] BIOS ROM sets

U19:   • 8K x 8-bit   • IBM part number 5000027   • Supplied here as a Mostek MK37050N    (pinout: MK37000 series) U18:   • 32K x 8-bit   • IBM part number 5000026   • Supplied here as a Mostek MK38022P    (pinout: MK38000 series) Photo (left) source: MicroCoreLabs at the Vintage Computer Forums

U19:   • 8K x 8-bit   • IBM part number 5000027   • Supplied here as a Mostek MK37050N    (pinout: MK37000 series) U18:   • 32K x 8-bit   • IBM part number 5000026   • Supplied here as a Mostek MK38022P    (pinout: MK38000 series) Photo (left) source: fs5500 at the Vintage Computer Forums.  His first set (of two).

U19:   • 8K x 8-bit   • IBM part number 5000027   • Supplied here as a Mostek MK37050N    (pinout: MK37000 series) U18:   • 32K x 8-bit   • IBM part number 5000026   • Supplied here as a Mostek MK38022P    (pinout: MK38000 series) Photo (left) source: fs5500 at the Vintage Computer Forums.  His second set (of two).

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