Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!usc!henry.jpl.nasa.gov!elroy.jpl.nasa.gov!jato!mars!kaleb
From: kaleb@mars.jpl.nasa.gov (Kaleb Keithley)
Newsgroups: comp.sys.ibm.pc
Subject: Re: AMI BIOS & Memory Upgrade
Keywords: Need Assistance
Message-ID: <2463@jato.Jpl.Nasa.Gov>
Date: 28 Dec 89 23:48:51 GMT
References: <47adab37.15c1a@lung.UUCP>
Sender: news@jato.Jpl.Nasa.Gov
Reply-To: kaleb@mars.UUCP (Kaleb Keithley)
Organization: Jet Propulsion Laboratory, Pasadena, CA.
Lines: 51

In article <47adab37.15c1a@lung.UUCP> gustoffm@lung.UUCP (Mark Gustoff) writes:
>I have a 386 20mhz PC with motherboard produced in Taiwan. It has
>the C&T CHIP set, and AMI BIOS dated 4-30-89. This system came with
>1 MB of ram on the motherboard via 4 SIPP modules. I ordered 4 1MB
>SIPP modules in order to expand the memory to 4MB (1MB conventional+
>3MB extended RAM).
>
>Apparently, the 4 256K SIPPS cannot be replaced with the 4 1MB SIPPS
>and everything works fine. I tried this, the PC just beeps at me 
>annoyingly. In the very brief manual that I have they make mention
>of a set up program called SETUP386.com which is suppose to store
>the appropriate information for the registers in CMOS. This is 
>apparently a program that gets run upon system bring-up. But I don't
>have this program.
>

My AMI BIOS dated 1989 in my Taiwan 386SX system allows you to enter the
setup by pressing DEL during the boot.  I called AMI to get a tech reference
for their BIOS, they want $25 for it, plus shipping and handling.  My SX
allows either 256K or 1M SIMMS in the first bank (of four) and ditto in the
second bank.  If 1M and 256K are to be mixed, the 1M SIMMS must be in the
first bank, and the 256K in the second bank.  I realize that this is what
you say you have done, I'm just confirming your setup.


    --------------------------------------------------
    |  I I I I I I I I                               |
    |  I I I I I I I I                               |
    |  I I I I I I I I                               |
    |  I   slots     I                               |
    |  I I I I I I I I                               |
    |  I I I I I I I I          motherboard          |
    |  I I I I I I I I                               |
    |                                                |
    |      4321                                      |
    |      iiii                                      |
    |      iiii SIMM/SIPP banks (2M each)            |
    |      iiii                                      |
    |      iiii                                      |
    ~                                                ~
    |                                                |
    --------------------------------------------------

When I receive my docs, if they apply to your system, then I'll post my

findings.

Chewey, get us outta here!
                 
kaleb@mars.jpl.nasa.gov             (818)354-8771
Kaleb Keithley