ccenol@rivm.UUCP (Arnold Reinders) (08/22/88)
I have a problem with my 10 Mhz AT-clone. It has 1 megabyte of memory on the motherboard, but the machine is only configurable as: 1. 512 Kb main memory and 512 Kb extended memory 2. 640 Kb main memory and 0!! Kb extended memory My dealer says it's a bug on the motherboard, but I can' vouch for his reliability. Does anyone know how I can configure the machine with 640 Kb main memory and 384 Kb extended memory? Any help would be appreciated. Thanks in advance. Arnold Reinders
richard@neabbs.UUCP (RICHARD RONTELTAP) (08/23/88)
Bad news, I have such a machine too. (maybe even the same) I've also tried various tricks, but couldn't use the remaining 384K with 640K main memory active. I think it is more a design descision of the manufacturer in stead of a bug. Richard
phil@amdcad.AMD.COM (Phil Ngai) (08/24/88)
In article <994@rivm05.UUCP> ccenol@rivm.UUCP (Arnold Reinders) writes: >Does anyone know how I can configure the machine with 640 Kb main memory >and 384 Kb extended memory? Any help would be appreciated. Thanks in advance. You are probably SOL. If your motherboard uses CHIPS devices which are not of the NEAT flavor, you are definitely SOL. Look for the 82C202 chip. I don't know about Zymos or whoever. What I do is put 64K chips in the motherboard's second bank, as they are real cheap. Then if I had the extra 256K chips, I'd buy a expanded memory board and use it as RAM cache. -- Why do Big-Endians number their bytes backwards from their bits? I speak for myself, not the company. Phil Ngai, {ucbvax,decwrl,allegra}!amdcad!phil or phil@amd.com
suhans@let.vu.nl (suhans) (08/24/88)
In article <994@rivm05.UUCP>, ccenol@rivm.UUCP (Arnold Reinders) writes: > I have a problem with my 10 Mhz AT-clone. It has 1 megabyte of memory > on the motherboard, but the machine is only configurable as: > > 1. 512 Kb main memory and 512 Kb extended memory > 2. 640 Kb main memory and 0!! Kb extended memory > > My dealer says it's a bug on the motherboard, but I can' vouch for his > reliability. > Does anyone know how I can configure the machine with 640 Kb main memory > and 384 Kb extended memory? Any help would be appreciated. Thanks in advance. The problem of 512 kb + 512 kb ext or 640 kb with 0 kb ext is a fault in the main board. It's not a bios problem but a hardware problem. I've the same problem and it can't be solved by my dealer. The only solution is to put 512 kb + 128 kb on the main board and the other 512 kb on a extended memory board +/- F 200,- with 0 kb. I have done that. -- Organisation: Free University, Faculty of Literature Amsterdam, the Netherlands Name: Hans Varkevisser (system administrator) hans@let.vu.nl or let.vu.nl!hans