SVI 738 Xpress circuit diagrams as found in the Technical Manual Scanned, ocr’ed and converted to PDF by HansO 2000/2001 With thanks to Alwin Henseler for stitching the pictures together! • System architecture • Pin assignment second drive • Pin assignment builtin drive • Logic board component layout • CPU • I/O decode and RAM refresh • Memory decode • PSG and cassette • Printer interface • Video circuit • RS232 interface • Keyboard matrix • MSX ROM • RS232 and Disk ROM • 64KB RAM • Floppy disk controller • Power supply • Joystick plug-in
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SVI 738 Xpress circuit diagrams
as found in the Technical Manual Scanned, ocr’ed and converted to PDF by HansO 2000/2001 With thanks to Alwin Henseler for stitching the pictures together! • System architecture • Pin assignment second drive • Pin assignment builtin drive • Logic board component layout • CPU • I/O decode and RAM refresh • Memory decode • PSG and cassette • Printer interface • Video circuit • RS232 interface • Keyboard matrix • MSX ROM • RS232 and Disk ROM • 64KB RAM • Floppy disk controller • Power supply • Joystick plug-in
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System architecture
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SVI 738 Xpress circuit diagramsScanned, ocr’ed and converted to PDF by HansO 200
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