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Dobbertin Memory Expansion

746 bytes added, 10:00, 8 June 2024
Optional two rom sockets. Each socket could be manually configured for rom 1-15
* For the I/O Ports, see [[Standard Memory Expansions]]port decoding is the same as Dk'tronics.
A15== Software ==0 with all other address bits can be any value.(Use 7fxx for compatibility)
Dobbertin supplied [[RDOS]] supports all ram configs (c4-ff) as a optional ROM to use the memory expansionexpected.
== Other memory expansions ==But, on a 464 with ROMs enabled and config 3 (c3 etc) is chosen we see:
[[Dk'tronics memory expansion‎]] &0000-&3fff: base ram &0000-&3fff &4000-&7fff: upper rom &8000-&bfff: base ram &8000-&cfff &c000-&ffff: upper rom
* For the I/O Ports, see [[SYMBiFACE IIStandard Memory Expansions]].
Non compatible to the Dobbertin expansion:== Software ==
Dobbertin supplied [[Vortex Expansions RDOS]] as a optional ROM to use the memory expansion as RAM card|Vortex SP 64 - SP 512disc with 444 KB free. They also supplied CP/M 2.2 and Plus with full support of the RAM disc. Other software using this RAM expansion: [[Discology]], Xexor, [[Cosmos]], [[On File]], [[Punishment]], [[Disc'o'Magic]], [[Pyradev]], Alyssa Database, [[CPC Word]], [[FutureOS]] and [[ParaDOS]]. Arnor software like Prowort ([[Protext]]) and [[MAXAM]] II also support the usage of the RAM disc.
== Photos Pictures ==
<gallery caption="The Dobbertin ram expansion">
Image:Dobbertin ram 1a.jpg|
Image:Dobbertin ram 2a.jpg|
Image:Dobbertin_512Kb_Top.jpg|Unit Top
Image:Dobbertin_512Kb_Bottom.jpg|Unit Bottom
Image:Dobbertin_512Kb_PCB_Top.jpg|PCB Top
Image:Dobbertin_512Kb_PCB_Bottom.jpg|PCB Bottom
</gallery>
[[Category:Hardware]] [[Category:Peripherals]] [[Category:Memory expansions]]
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