lphillips@lpami.wimsey.bc.ca (Larry Phillips) (07/13/90)
In <25507@mimsy.umd.edu>, kelso@mimsy.umd.edu (Stephen Kelley) writes: >I installed 2MB (16) worth of 80ns Toshiba Static Column Zips >in my A3000/25 and all I get on bootup is the Kickstart requester >screen w/ the Hard Disk options turned off. When I then tried to >boot from floppy I got a message something to the effect that >"No memory found". > >Obviously I hosed up something (:-{ Yup. >Here's what I did: > > 1) Removed the power supply/disk drive platform (NOT an easy job! >As mentioned in another posting the hard disk ribbon cable is *short* >so its hard to get the connectors off ans *esp.* on. Also, there are >3 plastic clips connecting the platform to the daughter board [to help >support the board I assume] which I found too hard to replace w/out >taking out the board.) Taking the board out is the best way. It isn't a big deal. > 2) Moved the fast mem dips to the chip mem sockets. They were >notched so I made sure the notches faced the same direction as the >surface mounted/soldered ones. > 3) Put the Zip chips in sockets C850 - C867 (the row of sockets >to the right) w/ the "label" side of the chips facing front. They >weren't notched so I had to choose one way or the other. I also >*had* to put them in by hand since they were so thin. I was "strapped >in/on" but who knows how sensitive these puppies are. ZIPs are usually 'notched' in one of two ways, sometimes both ways: ______________ /. | | | |______________| The angle 'notch' and the little 'hole' are both indicative of the pin 1 end. Putting the printing on the chip to the front of the machine will do it. Looks like you got them in facing the right direction, but your problem is in where you put them. Sockets 850-867 are _NOT_ 'the row of sockets to the right'. I don't have my manual handy, but the 4 possible configurations of ZIP chips chips are laid out as follows (a line shows a chip in place, a row of dots shows no chip, front of machine toward bottom): 1 or 4 megs 2 or 8 megs ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ______ ______ ______ ______ ______ ______ ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ______ ______ ______ ______ ______ ______ ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ______ ______ ______ ______ ______ ______ ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ______ ______ ______ ______ ______ ______ 3 or 12 megs 4 or 16 megs ...... ...... ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ...... ...... ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ...... ...... ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ...... ...... ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ ______ > 4) Re-assembled the box. As said before the hdisk cable is a bitch >to get back in as well as the d-board clips. A word to the wise... >*Observe* the cable positions. *None* of the disk cable connectors >are notched. Red stripe (on hdisk cable) to pin 1 is a fairly std >rule (pin 1 on the m-board for both the floppy & hard drive connectors >is marked). I had a fair bit of slack in my cable. The first time I took it out, I made sure that the cable was free enough to give me some room to work. Once you do that, it's pretty easy to work with. > 4) Connected monitor, keyboard, mouse & power & turned it on. >I got the Kickstart >requester. I soft booted 3-4 times and kept getting the same thing. >I finally put in the Kickstart 2.0 floppy & then I got the "no mem" >message. (I tried this a few times, too). -larry -- The raytracer of justice recurses slowly, but it renders exceedingly fine. +-----------------------------------------------------------------------+ | // Larry Phillips | | \X/ lphillips@lpami.wimsey.bc.ca -or- uunet!van-bc!lpami!lphillips | | COMPUSERVE: 76703,4322 -or- 76703.4322@compuserve.com | +-----------------------------------------------------------------------+
kelso@mimsy.umd.edu (Stephen Kelley) (07/13/90)
I installed 2MB (16) worth of 80ns Toshiba Static Column Zips
in my A3000/25 and all I get on bootup is the Kickstart requester
screen w/ the Hard Disk options turned off. When I then tried to
boot from floppy I got a message something to the effect that
"No memory found".
Obviously I hosed up something (:-{
Here's what I did:
1) Removed the power supply/disk drive platform (NOT an easy job!
As mentioned in another posting the hard disk ribbon cable is *short*
so its hard to get the connectors off ans *esp.* on. Also, there are
3 plastic clips connecting the platform to the daughter board [to help
support the board I assume] which I found too hard to replace w/out
taking out the board.)
2) Moved the fast mem dips to the chip mem sockets. They were
notched so I made sure the notches faced the same direction as the
surface mounted/soldered ones.
3) Put the Zip chips in sockets C850 - C867 (the row of sockets
to the right) w/ the "label" side of the chips facing front. They
weren't notched so I had to choose one way or the other. I also
*had* to put them in by hand since they were so thin. I was "strapped
in/on" but who knows how sensitive these puppies are.
4) Re-assembled the box. As said before the hdisk cable is a bitch
to get back in as well as the d-board clips. A word to the wise...
*Observe* the cable positions. *None* of the disk cable connectors
are notched. Red stripe (on hdisk cable) to pin 1 is a fairly std
rule (pin 1 on the m-board for both the floppy & hard drive connectors
is marked).
4) Connected monitor, keyboard, mouse & power & turned it on.
The hdisk flashed rythmically 10-20 times then I got the Kickstart
requester. I soft booted 3-4 times and kept getting the same thing.
I finally put in the Kickstart 2.0 floppy & then I got the "no mem"
message. (I tried this a few times, too).
OK. Any suggestions? Please reply today (Fri 7/13) if possible.
I'd like to get ot working this weekend.
Thanks,
stevek
--
Real: Stephen Kelley, Welch Library, Johns Hopkins Univ.
Internet: stevek@welch.jhu.edujoe@cbmvax.commodore.com (Joe O'Hara - Product Assurance) (07/14/90)
In article <25507@mimsy.umd.edu> kelso@mimsy.umd.edu (Stephen Kelley) writes: >I installed 2MB (16) worth of 80ns Toshiba Static Column Zips >in my A3000/25 and all I get on bootup is the Kickstart requester >screen w/ the Hard Disk options turned off. When I then tried to >boot from floppy I got a message something to the effect that >"No memory found". > >Obviously I hosed up something (:-{ > >Here's what I did: > > 3) Put the Zip chips in sockets C850 - C867 (the row of sockets >to the right) w/ the "label" side of the chips facing front. They >weren't notched so I had to choose one way or the other. I also >*had* to put them in by hand since they were so thin. I was "strapped >in/on" but who knows how sensitive these puppies are. The ZIPs should be placed in number sequence (C850, C851, etc.), not in contiguous sockets. It should look like this: ----back of unit----- ======== ======== <---empty ======== ======== xxxxxxxx xxxxxxxx <---filled xxxxxxxx xxxxxxxx ======== ======== ======== ======== xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx ======== ======== ======== ======== xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx ======== ======== ======== ======== xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx ----front of unit---- -- ========================================================================== Joe O'Hara || Disclaimer: I didn't say that! Commodore Electronics Ltd || Product Assurance || "I never lie when I have sand in my shoes." Systems Evaluation Group || - Geordi LeForge, Star Trek TNG ==========================================================================
jms@tardis.Tymnet.COM (Joe Smith) (08/04/90)
In article <25507@mimsy.umd.edu> kelso@mimsy.umd.edu (Stephen Kelley) writes:
I installed 2MB (16) worth of 80ns Toshiba Static Column Zips
in my A3000/25 and all I get on bootup is the Kickstart requester
screen w/ the Hard Disk options turned off. When I then tried to
boot from floppy I got a message something to the effect that
"No memory found".
When I got the "No memory found" error, I traced it down to a bent pin on
one of the chips in the first bank of fast ram. Re-inserting the chip
fixed that.
--
Joe Smith (408)922-6220 | SMTP: jms@tardis.tymnet.com or jms@gemini.tymnet.com
BT Tymnet Tech Services | UUCP: ...!{ames,pyramid}!oliveb!tymix!tardis!jms
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