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System 80 Technical Manual
The 1983 third issue of the Technical Manual, pictured here, (courtesy of Keith Whitehead, Palmerston North, NZ) contained an extended troubleshooting section and the full schematics for every variety of the System 80 plus the peripherals. There was also a more detailed discussion of the internal signals used in the video circuitry, plus a full explanation of the UART registers in the Serial interface. I've included a selection of scanned pages from this Issue below. They may be of use to technical historians, or those who have come into System 80 ownership through a garage sale etc. The scans are large full-sized JPGs scanned at 150dpi, and will need to be printed out to be of value. True masochists can download the whole manual as a 14MB ZIP file. Please note that in the original manual some of the circuit diagrams were large fold-out ones for greater clarity. These are reduced in the downloadable PDF file so for those hardware hackers requiring as much detail as possible, downloading and printing out the relevant schematic JPGS in section 4 may be of more value. Note: Dick Smith Electronics has kindly given permission for PDF files of this and other manuals to be included on this site. Copies of these manuals can not be uploaded to another site, or reproduced for commercial gain. Please respect these conditions. 1. Theory of Operation
2. Troubleshooting
3. Troubleshooting Hints
4. Circuit Schematics and Board Layouts
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Dick
Smith released three issues of a Technical Manual for the System 80.
Each issue was larger than the one before. The 