rcte2p@jetson.uh.edu (Paul S. Sears) (11/12/90)
I have a question about Ram expansion. I have a 520ST that was expanded to a total of 1Meg with the Easie ST solderless Ram board by AERCO. I am now thinking of expanding my ram to 2+ megs. My first question: The ram board (bank1 or ST memory) has 2 banks of chip sockets, with currently 1 set filled to making up 512K which, I was wondering if I went and added more ram to that extra bank would the board still function properly (thus giving me a wierd config of 1.5megs total)? BTW, are these 64K-bit or are they 250k-bit chips? I did inquire sometime ago about adding 1mega-bit chips to the board and I was told that CMOS 511-000 @120ns or better were fine. First, what exactly are 1M-bit chips and how many are required to make 1Meg ram? 8? What are the current prices for 1M-bit ram chips and where could I get some? Anyone else have this particular Ram board and any info on it? -- Paul Sears The Univ. of Houston |"The greater an individual's power Student of the College of Technology | over others, the greater the evil that RCTE2P@Jetson.uh.edu *** | might possibly originate with him." RCTE2P@menudo.uh.edu * * * | - PROPAGANDA, from A Secret Wish (CD)
ttensfeldt@eagle.wesleyan.edu (Thomas Tensfeldt) (11/14/90)
In article <7589.273dd7a1@jetson.uh.edu>, rcte2p@jetson.uh.edu (Paul S. Sears) writes: > > I have a question about Ram expansion. I have a 520ST that was expanded to a > total of 1Meg with the Easie ST solderless Ram board by AERCO. I am now > thinking of expanding my ram to 2+ megs. My first question: > > The ram board (bank1 or ST memory) has 2 banks of chip sockets, with currently > 1 set filled to making up 512K which, I was wondering if I went and added more > ram to that extra bank would the board still function properly (thus giving me > a wierd config of 1.5megs total)? BTW, are these 64K-bit or are they 250k-bit > chips? > > I did inquire sometime ago about adding 1mega-bit chips to the board and I > was told that CMOS 511-000 @120ns or better were fine. First, what exactly are > 1M-bit chips and how many are required to make 1Meg ram? 8? What are the > current prices for 1M-bit ram chips and where could I get some? Anyone else > have this particular Ram board and any info on it? > > -- > Paul Sears The Univ. of Houston |"The greater an individual's power I too would be interested because I am in the exact situation that Paul is in. Is Aerco still around? I suppose I should try to call them to find out. Now where is the folder with the boards documentation... Ha I found it...! The infoI have says that you must install 16 TC511000P(120 ns or faster) drams to get a total of 2.5 meg. I guess I ought to buy the ram and try it. However, I seem to remember someone saying this board isn't exactly plug and go. Anyone no anything about this. Thanks... =============================================================================== Tom Tensfeldt Bitnet: TTENSFELDT%Eagle.WESLYN@Wesleyan.Bitnet Internet: TTENSFELDT@Eagle.Wesleyan.Edu 4 Laurel Avenue, Ledyard, CT 06339 (203)-464-9009 Pfizer, Inc., Box 100, Groton, CT 06340 (203)-441-4835 Chemistry Dept, Wesleyan Univ, Middletown, CT (203)-347-9411 X2635 ===============================================================================
ric@mcrware.UUCP (Ric Yeates) (11/15/90)
>>A couple people ask question about the AERCO memory board.
I recently upgraded mine from .5M to 2M.
I used Hitachi 1Mx1's (HM511000AP12) @ 120ns for $6 apiece from
Microprocessors Unlimited Corp. Without any documentation, I accidently
installed the chips in the sockets where the 256Kx1's were (well, they
fit! :-). Actually, they go in the other bank of sockets; the near bank
as you look at the board from the front of your ST. The sockets in that
bank have exactly the right number of holes. The easiest way to do the
installation is: remove the PCB from it's connectors, destall the old
RAM, install the new RAM, and reinstall the board on it's connectors.
There is no need to change anything about your ST or RAM board to do this
upgrade (except the RAM :-).
Have fun with 2.5M! I do.
PS If you want the phone number of Microprocessors Unlimited I have it. The
prices may have gone down since I bought my RAM.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Ric Yeates Microware Systems Corp.
"I found these opinions on the floor, so I don't think they belong
to Microware."
1. Grease Generously
2. Wax Philosophically
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=ttensfeldt@eagle.wesleyan.edu (Thomas Tensfeldt) (11/15/90)
In article <3913@mcrware.UUCP>, ric@mcrware.UUCP (Ric Yeates) writes: >>>A couple people ask question about the AERCO memory board. > ... > PS If you want the phone number of Microprocessors Unlimited I have it. The > prices may have gone down since I bought my RAM. > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > Ric Yeates Microware Systems Corp. Ric, Please send me the # to microprocessors unlimited or post it. Others might want to know. Thanks... This sounds too easy not to try... Tom Tensfeldt
ric@mcrware.UUCP (Ric Yeates) (11/15/90)
In article <1990Nov14.213131.35815@eagle.wesleyan.edu> ttensfeldt@eagle.wesleyan.edu (Thomas Tensfeldt) writes: >In article <3913@mcrware.UUCP>, I wrote: >>>>A couple people ask question about the AERCO memory board. > Please send me the # to microprocessors unlimited or post it. Others might ^^^^^^^ >want to know. Thanks... This sounds too easy not to try... >Tom Tensfeldt I decided to post it. Microprocessors Unlimited, Inc. 24000 South Peoria Ave. Beggs, OK 74421 (918) 267-4961 The price I quoted ($6 for 120ns 1Mx1) was from their August 29, 1990 price flier. Ric -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ric Yeates Microware Systems Corp. "I found these opinions on the floor, so I don't think they belong to Microware." 1. Grease Generously 2. Wax Philosophically -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=