>Does anyone know if de-asserting A20M# is enough to cause A20 to behave
>normally? On our board, after we force A20M# high, the system continues to >behave as if A20 is always zero. We're using an embedded board, so there is no >keyboard controller in the mix - I/O port 0x92 is enough to toggle A20M#. A note for the record. It appears to be a feature of the Xeon that a change in A20M# doesn't take effect until after the processor steps forward at least one instruction. So if you use an emulator to stop the processor and toggle A20M#, you won't see any change in memory behavior until you step through the next instruction. Doh! Steve _______________________________________________ LinuxBIOS mailing list [email protected] http://www.openbios.org/mailman/listinfo/linuxbios
