netadm@altnet.UUCP (The Network Administrator) (05/23/87)
I have a 6Mz real AT, pumped up to 8Mz, and a real IBM memory expansion board. Presently, the DIP switch settings are such that the memory on the board is only accessable above the 1Mb address space. The board works fine as a RAM disk. The Question: How should the DIP switches be set so part of the expansion memory can be used to supplement the 512K memory on the motherboard? Can the board be used to give 1Mb of continuous memory, to use with Minix or Xenix? Can the board memory be used to bring the main memory upto 640K for use with PC-DOS 3.2 and the rest of the 1/2meg on the board be used for a RAM disk? Present DIP switch settings: SW0 on on on off on on on on SW1 on on on off on off on off The technical reference manual only gives settings for indicating the number of boards. I have tried the obvious: running setup and lying about the amount of motherboard memory, saying 640K, and saying that the expansion memory was 384K. That got me nowhere. Fooling around with various settings gave parity errors when running or error messages that some memory was bad during the POST. Thanks for any help or ideas.