

For an IBM 5170 (IBM AT)
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1. Obtain two blank 27256, or 27C256, EPROM's
   For the 6 Mhz versions of the IBM 5170, the EPROM's will need to be speed rated at 260 ns or faster (e.g. 250ns, 200ns, 150ns, ...)
   For the 8 Mhz version of the IBM 5170, the EPROM's will need to be speed rated at 190 ns or faster (e.g. 150ns, 100ns, ...)

2. Burn file [BIOS ROM - PhoenixBIOS A286 - Version 1.01 - Even.bin] to the first 27256, then label that 27256 as "U27".

3. Burn file [BIOS ROM - PhoenixBIOS A286 - Version 1.01 - Odd.bin] to the second 27256, then label that 27256 as "U47".



