View source for Dk'tronics Silicon Disc

[[Image:Silicon disk.JPG|thumb|Box and Manual for the memory expansion (464 version)]]

[[Image:Silicon disc front2.jpg|thumb|A closeup of 6128 version]]

A 256Kb RAM expansion for the CPC.  This combined with the DkTronics 256Kb memory expansion (advertised as such) would give the CPC an additional 512Kb RAM in the case of a 464/664 or an additional 448Kb RAM in the case of the 6128 - ie: in all cases a maximum of 576Kb RAM.

== Silicon Disc Versions ==

* "dk'tronics Silicon Disc" cartridge
* "dk'tronics Silicon Disc Operation System" cartridge

The difference here is probably, that the first cartridge contains plain RAM, the second additionally a BIOS ROM with RSX commands for accessing the RAM disc.

== Other Versions ==

Dk'tronics also made the "[[Dk'tronics memory expansion]]". Not sure if/how it differs from the "Silicon Disc". Maybe it's just renamed and contains exactly the same hardware... or maybe one of the devices is battery-backed, and the other isn't...?

An article in Amstrad Action described how a Silicon Disk can be converted into a 256K memory expansion. I think this applies to the RAM part only. [which article is that?]

== Some relevant Info from Manual ==

* The '''64K silicon disc''' is contained in one unit (Operating system ROM), while the '''256K silicon disc''' is in two units (256K RAM and Operating system ROM).
* When the computer is powered up the ROM should sign itself on as:-
** 'Silicon Disc 0.1' (for use with  64K BANKED RAM)
** 'Silicon Disc 1.1' (for use with 256K BANKED RAM)
* Remember the contents of the silicon disc are lost if the computer is switched off!
* 64K Silicon Disc: OUT &7F00, &C4+BANK   ;where BANK is 0..3
* 256K Silicon Disc: OUT &7F00, &E4+(BANK AND 3)+(BANK/4)*8  ;where BANK is 0..16

== Manual ==

* [[Media:DKTronics_Silicon_Disk_Manual.pdf]] - DK'Tronics User Manual (English)

== Pictures ==

<gallery>
File:NoPicture.gif|Circuit Board
</gallery>

[[Category:Hardware]] [[Category:Peripherals]] [[Category:Memory expansions]]