wtr@moss.ATT.COM (3673,ATTT) (10/11/89)
good morning netland! just received brian botton's video display board. nice job brian! just one small question: why did you use the socket pins and have us bend a pin out on the 68010 instead of using a second socket underneith the daughter board? clearence? i may be looking into a small board modification to allow this. i haven't started the video board yet, but last night i did install a WD2010A on the motherboard. i used brians instructions on "how to open up your 3b1" and have the following observations: NOTE: my motherboard was a "REV B" (white sticker in front right side on motherboard) with 2MEG unsocketed ram. no whitewires on the top side. unit has one fan. (1) when removing the second plastic cover (after pulling the monitor off the top) check the power connector on the floppy drive. it may need to be disconnected to avoid interfering with this removal. (2) also, prying lightly with a screwdriver (small) under the front edge of the plastic shell helped detach it and get it moving. (3) if you want to make work much easier, go ahead and remove the top board (with the drives and power supply). After you get the plastic shell off, disconnect the red and blue leads from the power switch. disconnect the fan, (fans?) and detach the green ground wire. my ground had to be unscrewed at the powersupply end, since the connector was soldered onto the switch :-( lift up the front on the metal cover and disconnect the three drive cables from the motherboard. now you can remove the top board and set it aside. this made working on the motherboard much easier. (especially removing chips) otherwise, the operation went very smoothly. thanks for the very good documentation, brian. one further question: on the front right side of the motherboard, right next to the volume adjustment, was a piece of plastic with a bunch of pins attached to it. this was inserted into a socket on the motherboard. it looked like about a 24-pin socket. brians figures have this position labeled as "network communications" or something of that sort. what is this for (or was it for, considering there's nothing there)? thanks for the help ===================================================================== Bill Rankin was: Bell Labs, Whippany NJ now: AT&T Federal Systems, Burlington NC (919) 228 3673 (cornet 291) email address: ...!att!moss!wtr ...!att!bromo!wtr -- ===================================================================== Bill Rankin was: Bell Labs, Whippany NJ now: AT&T Federal Systems, Burlington NC
gil@limbic.UUCP (Gil Kloepfer Jr.) (10/13/89)
In article <2212@cbnewsl.ATT.COM> wtr@moss.ATT.COM writes: >on the front right side of the motherboard, right next to >the volume adjustment, was a piece of plastic with a bunch >of pins attached to it. this was inserted into a socket on >the motherboard. it looked like about a 24-pin socket. >brians figures have this position labeled as "network >communications" or something of that sort. > >what is this for (or was it for, considering there's >nothing there)? >Bill Rankin >email address: ...!att!moss!wtr This is the network/dialer CHIP! Yes Bill, it's a CHIP, not just a piece of plastic! It's definitely a funny-looking IC, but it serves several purposes, among which is control all the phone stuff and provide the BEEP you hear when you hit control-G. ---------- | Gil Kloepfer, Jr. | ICUS Software Systems/Bowne Management Systems (depending on where I am) | ...icus!limbic!gil or gil@icus.islp.ny.us