by LS120 » Sun May 24, 2020 8:50 pm
Parts List to build: (about $240nz) depends on where you get parts from..
Keyboard parts;
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U1 x 1 74LS145
U2 x 1 74LS07
D1 x 1 3 mm, green LED
D2 x 1 3 mm, yellow LED
D3 x 1 3 mm, red LED
Diode x 3 D4-6 1N4148
Keyboard Switch x 72 SW1-SW64, SW66-SW73 MX Cherry - Linear
Keyboard Switch x 1 SW65 MX Cherry - High Force Linear
Switch Leveling Kit SW13, SW49, SW64, SW65, SW73 Leveling kit for MX 1x2, 1x2.25, 1x2.75 5
Switch Leveling Kit SW64 Leveling kit for MX 1x8 1 to build a through hole leveling kit for the spacebar
Keycaps SW1-SW73 x 1kit 104 Keycaps kit for Cherry MX Keyboard
Connector x 1 J1 2x8 pin header, right angle, shrouded, 2.54 mm pitch
Capacitor x 2 C1, C2 0.1 uF, MLCC, 5 mm lead spacing
Capacitor x 1 C3 10 uF, MLCC, 5 mm lead spacing
Resistor Array x 1 RN1 4.7 kohm, bussed, 6 pin SIP
Resistor x 3 R1 - R3 470 ohm, through hole
Motherboard Parts;
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U1 x 1 Z80 CPU, CMOS, 40 pin DIP - Z84C00xxPEG
U2 x 1 82C55 PPI, CMOS, 40 pin DIP - CP82C55AZ
U3 x 1 V9958 VDP, 64 pin DIP Note: V9938 VDP can be used instead
U4 x 1 YM2149 PSG, 40 pin DIP or AY-3-8910
U5 x 1 RP5C01 RTC, 18 pin DIP
U6 x 1 512 KiB Flash ROM, 32 pin DIP - SST39SF040
U7 x 1 512 KiB SRAM, 32 pin DIP - AS6C4008
U8 x 4 - U11 D41464, 64K x 4 DRAM, 18 pin DIP
U12-U14 x 3 Simple Programmable Logic Device - ATF16V8B
U15-U18 x 4 4-by-4 Register File - 74HC670, 16 pin DIP
U19-U21 x 3 74F541, 20 pin DIP
U22 x 1 74HCT540, 20 pin DIP
U23,U24 x 2 74HCT273, 20 pin DIP Note U24 is optional - printer port support.
U25,U26 x 2 74F245, 20 pin DIP
U27 x 1 74HCT175, 16 pin DIPE
U28,U29 x 2 74HCT157, 16 pin DIP
U30,U31 x 2 74HCT153, 16 pin DIPE
U32 x 1 74AHCT138, 16 pin DIPN
U33 x 1 74AHCT125, 14 pin DIP Note U33 is optional - printer port support.
U34-U36 x 3 Dual Flip Flop - 74HCT74, 14 pin DIP
U37-U39 x 3 74AHCT32, 14 pin DIP
U40,U41 x 2 74HCT30, 14 pin DIP
U42 x 1 74LS07, 14 pin DIP
U43 x 1 74HCT04, 14 pin DIP
U44 x 1 74AHCT02, 14 pin DIP
U45 x 1 74HCT00, 14 pin DIP
U46 x 1 Microprocessor Supervisory Circuit - ADM691A Possible alternatives: MAX691, LTC691, ADM691
U47 x 1 Sony CXA1645P RGB Encoder, 24 pin DIP-400
U48 x 1 MCP6281-E/P Operational Amplifier, 8 pin DIP
U49 x 1 LM311N, Voltage Comparator, 8 pin DIP Note U49 is optional - cassette recorder support.
Capacitor x 58 C1 - C58 0.1 uF, MLCC, 5 mm Pitch
Capacitor x 6 C59 - C64 220 uF, Electrolytic Note C62 - C64 optional - RGB output support
Capacitor x 3 C65 - C67 100 uF, 16V, Aluminum Organic Polymer
Capacitor x 3 C68 - C70 10 uF, MLCC, 5 mm Pitch Note C71 optional - cassette recorder support.
Capacitor x 7 C71 - C77 10 uF, Electrolyti Note C71 optional - cassette recorder support.
Capacitor x 1 C78 1 uF, Electrolytic Note C78 optional - cassette recorder support.
Capacitor x 2 C79, C80 22 nF, MLCC, 5 mm Pitch Note C79, C80 optional - cassette recorder support.
Capacitor x 1 C81 1.5 nF, MLCC, 5 mm Pitch
Capacitor x 3 C82 - C84 330 pF, MLCC, 5 mm Pitch
Capacitor x 1 C85 47 pF, MLCC, 5 mm Pitch
Capacitor x 2 C86, C87 33 pF, MLCC, 5 mm Pitch
Capacitor x 3 C88 - C90 30 pF, Trim Capactiors, 5 mm Pitch
Capacitor x 1 C91 27 pF, MLCC, 5 mm Pitch Note C91 should be 18 pF for PAL support.
Capacitor x 2 C92,C93 22 pF, MLCC, 5 mm Pitch
Capacitor x 1 C94 4.7 pF, MLCC, 5 mm Pitch
Resistor Array x 4 RR1 - RR4 10 kohm, bussed, 10 pin SIP
Resistor Array x 3 RR5 - RR7 4.7 kohm, bussed, 10 pin SIP
Resistor Array x 1 RR8 4.7 kohm, bussed, 6 pin SIP
Resistor Array x 1 RR9 470 ohm, bussed, 6 pin SIP
Resistor x 2 R2,R3 470 kohm, axial
Resistor x 1 R4 220 kohm, axial
Resistor x 2 R5,R6 100 kohm, axial
Resistor x 2 R7,R8 47 kohm, axial
Resistor x 2 R9,R10 20 kohm, 1% tolerance, axial Note R9 should be 16 kohm, 1% for PAL support.
Resistor x 4 R11-R14 10 kohm, axial Note R11, R12 are optional - cassette recorder support. Note R14 is optional - RGB output support.
Resistor x 1 R15 5.6 kohm, axial
Resistor x 7 R16-R22 4.7 kohm, axial Note R18 - R20 are optional - cassette recorder support.
Resistor x 2 R23,R24 2.7 kohm, axial Note R23, R24 are optional - cassette recorder support.
Resistor x 2 R25,R26 2.2 kohm, axial
Resistor x 7 R27-R33 1 kohm, axial Note R31, R32 are optional - cassette recorder support. Note R33 is optional - RGB output support.
Resistor x 1 R34 470 ohm, axial
Resistor x 1 R35 180 ohm, axial Note R35 is optional - RGB output support.
Resistor x 1 R36 120 ohm, axial Note R36 is optional - RGB output support.
Resistor x 6 R37-R42 100 ohm, axial Note R42 is optional - cassette recorder support.
Resistor x 6 R43-R48 75 ohm, axial Note R46 - R48 are optional - RGB output support.
Relay x 1 RY1 5V SPDT relay
Inductor x 1 L1 68 uH, axial
Inductor x 2 L2,L3 5.7 uH, axial
Diode x 1 D1 1N4148 Note D1 is optional - cassette recorder support.
Transistor x 2 Q1,Q2 PN2907A Note Q1 is optional - cassette recorder support.
Crystal x 1 Y1 21.477270 MHz
Crystal x 1 Y2 32768 Hz
Crystal x 1 Y3 4.433618 MHz Note Y3 is optional - PAL support.
Polyfuse x 1 F1 750 mA, radial, 5 mm pitch
Connector x 1 J1 DC Power Jack, 2mm
Connector x 1 J2 RCA Phono connector, Yellow
Connector x 1 J2 RCA Phono connector, White
Connector x 1 J4 Mini DIN 4-pos, Right Angle, PCB mount
Connector x 2 J5,J6 DIN 8-pos, Right Angle, PCB mount Note J5 is optional - RGB support; J6 is optional - cassette recorder support.
Connector x 2 J7,J8 Sub-D DE9M, Right Angle, PCB mount
Connector x 1 J9 Micro Ribbon 14-pos, Female, Right Angle, PCB mount Note J9 is optional - printer port support.
Connector x 1 J10 8 pin friction lock connector
Connector x 1 J11 2x8 pin header, shrouded
Connector x 1 J12 2x20 pin socket
Connector x 1 J13 2x2 pin header
Connector x 1 J14 1x13 pin header
Connector x 2 SLOT1,SLOT2 50 pin card edge connector
Jumper x 2 JP1,JP2 2 pin header
Jumper x 4 JP3-JP6 Wire link
Battery Holder x 1 BT1 CR2032 Battery holder
Battery x 1 BT1 CR2032 Battery
IC Socket x 3 U1,U2,U4 40 pin DIP
IC Socket x 1 U3 64 pin DIP
IC Socket x 2 U6,U7 32 pin DIP
IC Socket x 1 U47 24 pin DIP, 400 mil spacing Note: Cut the socket in the middle. If using a socket with 600 mil spacing, remove excess material. Alternatively, solder U47 (CXA1645P) without using a socket.
IC Socket x 11 U12-U14,U19-U26 20 pin DIP
IC Socket x 5 U5,U8-U11 18 pin DIP
IC Socket x 11 U15-U18,U27-U32,U46 16 pin DIP
IC Socket x 13 U33-U45 14 pin DIP
IC Socket x 2 U48,U49 8 pin DIP