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From: louie@umd5.UUCP (Louis Mamakos)
Newsgroups: net.micro.amiga
Subject: Memory/clock expansion for the Amiga (9/9 - parts.list)
Message-ID: <1023@umd5.UUCP>
Date: Wed, 11-Jun-86 16:13:04 EDT
Article-I.D.: umd5.1023
Posted: Wed Jun 11 16:13:04 1986
Date-Received: Sat, 14-Jun-86 05:03:32 EDT
Reply-To: louie@trantor.umd.edu (Louis Mamakos)
Organization: U of Md, CSC, College Park, Md
Lines: 62


Parts list for one megabyte memory board with clock

Chips

2  74LS00    B5, B6
2  74LS04    A6, B3
2  74LS10    A4, B1
2  74LS20    A2, A7
2  74LS74    A3, B4
1  74HC74    A8
1  74125     D4
1  74LS138   A1
5  74LS153   C1, C2, C3, C4, C5   (May be 74LS253)
1  74LS175   A5
2  74LS393   B2, C6
2  74HC244   D3, D5               (May be Am2966, NOT 74LS244)
3  74LS245   B8, D1, D7
1  MC146818  C8
32 Rams      E1 thru H8           (May be any 256k by 1 dynamic ram at 200ns
                                   or faster access time.  I have tried
                                   several brands, both CMOS and NMOS, with
                                   no problems.)

Capacitors

48 0.1 uf ceramic cap 12v or higher (bypass caps at each chip, not on schem.
2  1.0 uf ceramic or tantalum, 12v or higher
1  10 pf NP0 ceramic or mica
1  4-20 pf variable (substitute any cap that covers 7-15 pf range)

Diodes

5  1N4148, 1N914 or equivalent

Resistors   all 1/4 watt 5% film

1  560 ohm
1  100k
1  390k
1  22M      if not available substitute 10M

Crystal

32768 Hz watch crystal

Battery

4 Nicad cells with holder.  Either A or C size is ok.

Sockets

14 14 pin wire wrap sockets. I substituted 16 pin for a price break.
39 16 pin wire wrap sockets.
5  20 pin wire wrap sockets.
1  24 pin .6 in spacing wire wrap socket.


-- 
Louis A. Mamakos WA3YMH   University of Maryland, Computer Science Center
 Internet: louie@trantor.umd.edu
 UUCP: {seismo!umcp-cs, ihnp4!rlgvax}!cvl!umd5!louie