jjoshua@topaz.rutgers.edu (Jon Joshua) (05/26/88)
Today was rather boring so I decided to up my ATs memory from 640k to 1meg. After getting over the shock of 18 drams I opened up the case and did some surgery. My system board supports 1 meg of memory so here's what I did. 1. I carefully ripped out 18 64k drams 2. I carefully filled the empty slots with 18 256k drams 3. I set a switch telling the machine that I have 1 meg I now have 2 banks of memory each with 512k. Upon booting, the machine test the memory and reports no problem. After this it says 'Memory no match - Run SETUP' 'Press ESC to continue' upon pressing escape to continue, I am presented with a machine with 512k of memory and 512k extended memory. How can I get the machine to give me 640k of base memory and 384k of extended memory? Or, how do I get rid of the annoying message when I boot the machine. -- _____________________________________________________________________________ |o| Jonathan Joshua jjoshua@topaz.rutgers.edu Why not... |o| |o| Nothing better to do |o| |o| Anything is possible, |o| \o| except for skiing through a revolving door. |o| \_ ____/ \ |o| \/ \ _______________________________ ______________________|o| \___ / \/ \/
madd@bu-cs.BU.EDU (Jim Frost) (05/27/88)
In article <May.26.01.38.42.1988.21576@topaz.rutgers.edu> jjoshua@topaz.rutgers.edu (Jon Joshua) writes: |My system board supports 1 meg of memory so here's what I did. | | 1. I carefully ripped out 18 64k drams | 2. I carefully filled the empty slots with 18 256k drams | 3. I set a switch telling the machine that I have 1 meg | |I now have 2 banks of memory each with 512k. Huh? 256 kbits / 8 bits-per-byte = 32 kbytes chip. 32 kbytes per chip * 18 chips = 576 kbytes total non parity checked RAM. 32 kbytes per chip * 16 chips (2 others for parity) = 512 kbytes parity checked RAM. Unless there are two more banks, your system doesn't support more than 512k of motherboard RAM. |Upon booting, the machine test the memory and reports no problem. |After this it says | | 'Memory no match - Run SETUP' | 'Press ESC to continue' | |upon pressing escape to continue, I am presented with a machine with |512k of memory and 512k extended memory. To fix this problem, run 'SETUP'. There are usually two kinds of configurations on AT machines -- DIP switches which usually configure hardware things like chip types, and 'soft' configurations which are kept in nonvolatile RAM and are . The SETUP program fixes the stuff in RAM. (This is simplistic, I know, but you get the idea.) Anyway, run SETUP and tell it you have 512k of main memory (or whatever it is that you have) and it'll stop this problem. jim frost madd@bu-it.bu.edu