Upgrade of the CPC 6128's internal RAM to 512 KiB as proposed in the article '''Aus David wird Goliath: 512 KB RAM für Schneider CPC''' in issue 10/1987, pages 156 to 162 of the German IT magazine '''c't'''. The DIY project name is '''CPC 6512'''. The mod requires to remove (or disable) the sixteen RAM chips on the CPC6128 mainboard, and to replace them by bigger chips, plus whatever additional bank selection logic.
One issue later, c't 11/1987, the magazine published a driver which creates a RAM disk within the additional memory. This RAM disk can be used in [[AMSDOS]]under CP/M Plus.
== Technical ==
== Scanned Article / Schematics ==
* [[Media:CPC6512 ct magazin part 1.pdf]] - c't issue 10/1987 - RAM Expansion Schematic* [[Media:CPC6512 ct magazin part 2.pdf]] - c't issue 11/1987 - RAM Disc driverfor CP/M Plus
== Related hardware modifications ==
* [http://cpcwiki.eu/forum/index.php/topic,662.msg7113.html#msg7113 Bank Swapper by Khany/Cherry-T] (less complex: bank-exchanging toggle, no memory expansion; 1993)
* [[CPC4MB| CPC4MB memory upgrade by Yarek]] (more advanced; 2005/2006)