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Old School 512K RAM Expansion

301 bytes added, 09:13, 4 November 2018
This card supports all 6128, 464 Plus and 6128 Plus machines but is not suitable for the older 464 and 664 computers.
The board is fully compatible with the DK'Tronics/Amstrad bank switching schemes described in the DK'Tronics Peripheral Technical Manual.  Electrically, the card is very low power. In typical use it draws only a couple of mA of current which is less than a tenth that taken by other CPLD based cards. The SRAM and HCT logic components are also very tolerant of low supply voltage and the card has been tested to work even as low as 3.5V.
The card has a Mother MX4 standard box connector rather than an edge connector. So to use the board you will need a Mother X4 or compatible expansion card.
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