Editing Amstrad PC1640 (section)

=== Power ===

As on the PC1512, the supply is in the monitor and feeds the system unit through a 14-way DIN cable with the same pinout: +5&nbsp;V on pins 3 and 5, +12&nbsp;V on pin 11, −12&nbsp;V on pin 9, −5&nbsp;V on pin 13.<ref name="trm1" /> Each monitor's alignment sets the computer's rails to the same targets as the PC1512's.<ref name="sm" /> Four non-rechargeable AA cells keep the clock and configuration memory alive.<ref name="trm1" /> The PC1640's monitors use a 9-way D video plug and separate syncs, and do not plug into a PC1512 without rewiring.<ref name="vcfmm">VintageVic and others, [https://forum.vcfed.org/index.php?threads/amstrad-1640-and-pc-mm-monitor-can-they-be-made-to-work-together.1251911/ "Amstrad 1640 and PC-MM monitor – can they be made to work together?"], Vintage Computer Federation Forums, February–March 2025. Retrieved 2026-10-02. Community discussion: PC-MM (8-pin DIN, composite sync) against PC1640 monitors (9-way D, separate syncs).</ref> DOS Days used a PC-ECD with another computer's EGA-capable card with the 14-way cable unplugged, and found that it runs without the computer connected.<ref name="dd3" />