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ZTO-80 Single Board Computer V2

10 months ago 528
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V2 of my ZTO-80 SBC project, with the end goal of having color graphics(?) along with a BASIC interpreter based off of NASCOM BASIC. A future revision may include support for CP/M.

Feel free to clone this project. Just be sure to acknowledge me as printed below:

Copyright Jacob Hahn 2019. This documentation describes Open Hardware and is licensed under the CERN OHL v. 1.2. You may redistribute and modify this documentation under the terms of the CERN OHL v.1.2. ( This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v.1.2 for applicable conditions





ID Name Designator Footprint Quantity BOM_Manufacturer Part BOM_Manufacturer BOM_Supplier BOM_Supplier Part
1 Z80 CPU U1 DIP40 1 Z84C0006PEG Zilog Digi-Key 269-3892-ND
2 AS6C62256A U2 DIP28-600 1 AS6C62256A-70PCN Alliance Memory, Inc. Digi-Key 1450-1182-5-ND
3 Z80DART U4 DIP40 1 Z84C4006PEG Zilog Future Electronics 3499407
4 MAX202 U5 DIP16 1 MAX202CPE+ Maxim Integrated Digi-Key MAX202CPE+-ND
5 1.8432MHz X2 OSCILLATOR_DIP-8 1 ECS-2100A-018 ECS Inc. Digi-Key XC231-ND
6 6.0000MHz X1 OSCILLATOR_DIP-8 1 ECS-2200BX-060 ECS Inc. Digi-Key XC1180-ND
7 AT28C256 U3 DIP28-600 1 AT28C256-15PU Microchip Technology Digi-Key AT28C256-15PU-ND
8 74LS139 U7 DIP16 1 SN74LS139AN Texas Instruments Digi-Key 296-1640-5-ND
9 74LS138 U6 DIP16 1 SN74LS138N Texas Instruments Digi-Key 296-1639-5-ND
10 1k R1,R2,R3,R4,R5,R6 0805 6 RNCP0805FTD1K00 Stackpole Electronics Inc Digi-Key RNCP0805FTD1K00CT-ND
11 XM3C-0922-502 DSUB1 DB9-G-DC 1 A-DS 09 A/KG-T2S Assmann WSW Components Digi-Key AE10968-ND
12 100nF C1,C2,C3,C4,C5,C6,C7,C8,C9,C10,C11,C13,C14,C12,C15 0805 15 CC0805KRX7R9BB104 Yageo Digi-Key 311-1140-1-ND
13 TS-1102-5016 SW1 KEY-6.0*6.0-2 1 1825910-6 TE Connectivity ALCOSWITCH Switches Digi-Key 450-1650-ND
14 PWR DC1 DC-005-2.5A-2.0 1 PJ-202A CUI Inc. Digi-Key CP-202A-ND
15 LED-3MM RED LED1,LED2 LED-3MM/2.54 2 SSL-LX3054ID Lumex Opto/Components Inc. Digi-Key 67-2239-ND
16 200 R7,R8 0805 2 RNCP0805FTD200R Stackpole Electronics Inc Digi-Key RNCP0805FTD200RCT-ND
17 Z80PIO U8 DIP40 1 Z84C2006PEG ZiLOG Mouser 692-Z84C2006PEG
18 ULN2803A U9 DIP18 1 ULN2803A STMicroelectronics Digi-Key 497-2356-5-ND
19 Z80CTC-P U10 DIP28-600 1 Z84C3006PEG Zilog Digi-Key 269-3910-ND
20 Header-Male-2.54_2x20 P1 HDR-20X2/2.54 1 67996-140HLF Amphenol ICC (FCI) Digi-Key 609-4925-ND
21 Header 4X2 P2,P3 HDR2X4 2 67996-108HLF Amphenol ICC (FCI) Digi-Key 609-3203-ND
22 10uF C16 0805 1 CL21A106KPFNNNG Samsung Electro-Mechanics Digi-Key 1276-6456-1-ND


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