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STD RC1979

License: Public Domain

Mode: Editors' pick

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Update time: 2022-03-25 15:52:33
Creation time: 2019-04-17 14:10:45
Description
A RC2014-compatible Z80 computer using only parts that would have been available (and affordable) in 1979. The purpose of this project is to learn not only how an 8-bit computer system works, but to do so as if I were a poor hobbyist in the late 70s. While I will be using modern equivalents to old chips (i.e. 5V EEPROM instead of high voltage EPROM), the modern chips must be pin-compatible with their ancestors. The goal is to keep it under $300 in 1979 dollars, or at least as close as I can get. Component prices will be referenced from ads in the back pages of the Oct, Nov, and Dec 1979 issues of Popular Electronics Magazine.
Design Drawing
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ID Name Designator Footprint Quantity
1 7805 $5 TO-220 1
2 Backplane 1x38 Female P2,P3,P4,P5,P6,P7,P8,P9,P1,P11,P13,P14,P10 HDR-2.54-FX-1X38PW 13
3 1k R1,R3,R11,R14,R15 AXIAL-0.3 5
4 2k2 $0,R4,R5,R10 AXIAL-0.3 4
5 Barrel Jack $1 DCJ0202 1
6 Z80CPU $10 DIP40 1
7 22p C2,$0 RAD-0.1 2
8 100n C8,C1,C3,C4,C5,C6 RAD-0.1 6
9 1M R2 AXIAL-0.3 1
10 10k R6,R7,R8,R9 AXIAL-0.3 4
11 3.5795MHz $1,$1.20A HC-49S 2
12 2114 U1,U2,U3,U4,U5,U6,U7,U8,U9,U10,U11,U12,U13,U14,U15,U16 DIP18 16
13 74LS138 $0 DIP16 NEW 1
14 2716 $29 DIP24-600 1
15 Jumper H1 HDR-2X1/2.54 1
16 Pin Header $0 HDR-6X1/2.54 1
17 74LS04 $3 SOIC-14_150MIL 1
18 MC6850 $4 NONE 1
19 $7.95 U17 NONE 1
20 74LS139 $0 NONE 1
21 Pin Header $1 HDR-13X2/2.54 1
22 RCA Jack P12 RCA 1
23 2N4400 Q1,Q2 TO92-INLINE 2
24 4.7k R12 AXIAL-0.3 1
25 150 R13 AXIAL-0.3 1
26 MC1372 U18 DIP14 1
27 MC6847 $15 DIP 1
28 $14.95 AY-5-2376 DIP40P6_TOMI_911 1
29 74LS138 $0 DIP-16_300MIL 1

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