du4@mace.cc.purdue.EDU (Ted Goldstein) (03/30/91)
Subject: Upgrading Memory in Z-248 I am trying to upgrade the memory in my Z-248-12 (model ZBF-2526-EK) and have run into some problems. I first added 2 1 MB SIMMS, and all seemed fine. I was able to use setup to configure 640K base and 2048K expanded (and I got to lose the 256K between 640 and 1M that I was using, thanks Zenith). I then removed the original 256K SIMMS and replaced them with 4 1 MB SIMMS. Now according to SETUP I still have the same orginal 3096K available total. It must be using the new SIMMS to get 3 Meg, but it won't recognize the full 6 Meg installed. Is there an undocumented jumper or sitch somewhere to tell the system what kind of SIMMS are installed? Any other suggestions? My attempts to talk to Zenith technical support have failed for the last 3 days. They never let you talk to a tech, and will only take a message. When the tech calls back, I am out. When I try to return his call moments after missing him, they still will only take a message! arrrrgggg Any suggestions ? ? ? ------------------------------------------------------------------------------- |Ted Goldstein | E-mail: du4@mace.cc.purdue.edu | |Network and Systems Admninistrator | Phone : (317) 494-9070 | |Purdue University School of Technology | Office: Knoy Hall, Rm G009 | |-----------------------------------------------------------------------------| |Philosophy's alright, when you have a house to think about it in-Arlo Guthrie| -------------------------------------------------------------------------------
du4@mace.cc.purdue.EDU (Ted Goldstein) (04/02/91)
>I am trying to upgrade the memory in my Z-248-12 (model ZBF-2526-EK) >Is there an undocumented jumper or sitch somewhere to tell the system what >kind of SIMMS are installed? Any other suggestions? My attempts to >talk to Zenith technical support have failed for the last 3 days. I finnaly got through to Zenith Tech Support and got my answer, so I thought I would share it for other 248 owners. Apparantly the 248 motherboard has a jumper which tells it if there are 1 Meg or 256K SIMMS in the first 4 SIMM slots. On my mother board the jumper is J103, but the Tech first told me J102 which apparantly was the number on a earlier revision of the motherboard. Since my board had no J102, I would suggest that if you have a J102, try it first, and if not then use J103. For J102: positions 1-2 mean 1 Meg SIMMS but for J103: positions 2-3 mean 1 MEG SIMMS. I hope this information proves usefull to someone else out there, it sure would be nice if it were in the manual that came with the PC. ------------------------------------------------------------------------------- |Ted Goldstein | E-mail: du4@mace.cc.purdue.edu | |Network and Systems Admninistrator | Phone : (317) 494-9070 | |Purdue University School of Technology | Office: Knoy Hall, Rm G009 | |-----------------------------------------------------------------------------| |Philosophy's alright, when you have a house to think about it in-Arlo Guthrie| -------------------------------------------------------------------------------