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"NVG Catalogue - Circuit Diagrams"

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Software title | FTP path & filename
##### Disciple circuit diagram | ##### pics/circuit-diagrams/disciple.gif
##### Kempston joystick interface circuit diagram | ##### pics/circuit-diagrams/kempston.gif
##### Plus D circuit diagram | ##### pics/circuit-diagrams/plus_d.gif
##### RGB interface circuit diagram | ##### pics/circuit-diagrams/rgb.gif
##### ZX81 64K upgrade circuit diagram | ##### pics/circuit-diagrams/zx81-64k-upgrade.gif
##### ZX81 circuit diagram. Part 1 | ##### pics/circuit-diagrams/zx81-circuit1.gif
##### ZX81 circuit diagram. Part 2 | ##### pics/circuit-diagrams/zx81-circuit2.gif
##### ZX81 clock doubler. Diagram & details | ##### pics/circuit-diagrams/zx81_clock_doubler.zip