Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!sbcs!eeserv1.ic.sunysb.edu!dtiberio From: dtiberio@eeserv1.ic.sunysb.edu (David Tiberio) Newsgroups: comp.sys.amiga.hardware Subject: Re: Adding RAM to the A3000 Keywords: How to Message-ID: <1991Apr1.214846.10333@sbcs.sunysb.edu> Date: 1 Apr 91 21:48:46 GMT References: Sender: usenet@sbcs.sunysb.edu (Usenet poster) Organization: State University of New York at Stony Brook Lines: 89 In article andrewsr@u2.rutgers.edu (Rich Andrews) writes: >Hello All! > >I am debating on whether or not to install my Zipp chips in my A3000 >myself. If you have done this yourself, please respond. I just did it Saturday. > >For a little background: I have been ripping apart IBM clones for a >while and am comfortable with replacing bad RAM chips, disk drives, >hard drives, controller cards, etc. > >I have heard that the process with the Amiga is quite involved. In >what way? If I take care to (try to :-) remember where everything >plugs in, would I have any trouble? I plugged the floppy drive in wrong, but eventually was able to correct it. > >EXACTLY how do the chips fit in the sockets (is there more than one >way?). Do the chips that are in the sockets now give clues on how the >replacements should fit? (I assume that moving the 1Mb of fast to >chip is a simple process). To move the 1meg Fast to Chip, simply pull the Fast ram and stick it in the sockets at the lower left of the A3000, matching the notch of the Chip DRAMs. Nothing more. I added 1x4 ZIP Static columns. First, after removing the 5 screws for the cover, remove the screw for the floppy drive (at the lower front of the drive bracket). Notice that the red stripe for pin one faces the left of the A3000. The power plug has 4 ridges facing upwards; I think the orange cable is on the right. Next, unscrew the single screw at the front right of the Quantum hard drive. Remove the hard drive, again noticing the red strip for pin one on the left of the interface. The power plug has the orange cable on the left. Remove the screw at the upper middle of the A3000, previously covered by the hard drive. Remove the screw connecting the expansion slot doorways at the back of the computer (you don't have to remove the actual covers for each expansion slot). Remove the screw at the upper middle of the A3000, to the left of the floppy bay. Unplug the big plug at the center of the A3000. It should leave a rectangle of about 12 pins, in a white receptacle. This provides power to the circuit board. Unplug the floppy drive interface from the motherboard, or feed te cable through the heat shield/platform. When lifting up the platform, be careful of the fan and the 'lip' around the case. Find the jumper in the upper middle section that has 1x4 and 256x4 marked on it, and move it to 1x4 for static ZIPs. Remove the DRAMS first! Otherwise, they will be very hard to remove after the ZIPS are in. Place the ZIPS in the sockets with the notch facing the left. Start at the DRAM sockets and work your way upwards, using every 4th socket. (front of A3000) (rear of A3000) DRAM sockets Z---Z---Z---Z--- DRAM sockets Z---Z---Z---Z--- Z = ZIP chip - = empty socket Be careful to place the ZIPs in correctly; they are very hard to remove by hand. > >From what I gather, the hardest part is stripping the PC down, not >putting the chips in. I am comfortable stripping it down, if the >actual install is easy, then I'll go for it. > >Thanks for any input, >-Rich >-- > // Rich | "Like any good philosophical discussion, the conclusion >\X/ Andrews | is left unresolved." - B. McLaughlin :) -- David Tiberio SUNY Stony Brook 2-3481 AMIGA DDD-MEN -- Any students from SUNY Oswego? Please let me know! :)