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/* Emulation */
[[Image:Dobbertin.gif|thumb|Dobbertin Logo]]
A harddisc manufactured by the German company called [[Dobbertin|Dobbertin Industrie-Elektronik]].
One of the first ways to connect a Harddisc to the CPC.
The Dobbertin harddisc has a capacity of 20MB20 MB. The disc was partitioned in four partitions of 5152Kb 5152 KB each. It was delivered with drivers for [[CP/M]](2.2 and CP/M+) and allows up to 512 directory entries for each drivepartition (including date and time stamps under CP/M Plus). It's even possible to boot CP/M Plus from the hard disc.
Reviewed in [[Amstrad Computer User]].
<gallery caption="Dobbertin 20 Mb Harddisc">
Image:DobbertinHDInterface_Top.jpg|Interface Top
Image:DobbertinHDInterface_Bottom.jpg|Interface Bottom
Image:DobbertinHDInterface_PCB_Top.jpg|Interface PCB Top
Image:DobbertinHDInterface_PCB_Bottom.jpg|Interface PCB Bottom
Image:Dobbertin 20 Mb Harddisc.JPG|Dobbertin 20 Mb Harddisc
Image:Dobbertin 20 Mb Harddisc interface.JPG|Dobbertin 20 Mb Harddisc interface
Image:Dobbertin 20 Mb Harddisc inside 1.JPG|Inside 1
Image:Dobbertin 20 Mb Harddisc inside 2.JPG|Inside 2
Image:Dobbertin 20 Mb Harddisc inside 3.JPG|Inside 3: PSUImage:Dobbertin 20 Mb Harddisc inside 4.JPG|Inside 4: XT controller </gallery> <gallery caption="Thanks to Jose Leandro - Interface PCB Layouts"> Image:Interface PCB Front.png|Interface PCB FrontImage:Interface PCB Front.JPG|Interface PCB FrontImage:Interface PCB Back.png|Interface PCB BackImage:Interface PCB Back.JPG|Interface PCB BackImage:Interface PCB Layout.jpg|Interface PCB Layout </gallery> <gallery caption="Thanks to Jose Leandro - Internal PCB Layouts"> Image:Internal PCB Front.png|Internal PCB FrontImage:Internal PCB Front.JPG|Internal PCB FrontImage:Internal PCB Back.png|Internal PCB BackImage:Internal PCB Back.JPG|Internal PCB BackImage:Internal PCB Layout.png|Internal PCB Layout
</gallery>
== Disc ==
<gallery caption="Dobbertin 20 Mb HarddiscHD Interface Driver Disc">
Image:HD20 Dobbertin CPC Harddisk side BA.jpg|HD20 Dobbertin CPC Harddisk Driver disc side BAImage:HD20 Dobbertin CPC Harddisk side AB.jpg|HD20 Dobbertin CPC Harddisk Driver disc side AB
</gallery>
== Software using the Dobbertin Harddrive ==
*[[Cosmos ]]*Dobbertin CP/M 2.2 (63 KB TPA) and CP/M Plus*[[FutureOS|FutureOS]] using all four partitions (I, J, K and L)*[[Maxam_2|MAXAM II]]*[[Prowort]] via using Dobbertin CP/M Plus (partitions D, E, F and G)*[[X-DDOS|X-DDOS]](v2.10)*[[Z3Plus]] and [[NZ-COM]] (providing hundreds of additional applications)*'-HD20BackUp' to backup / compare / restore the complete 20 MB hard disc*In addition a lot of (cracked) games are able to run from the HD-20 hard disc
== Technical Specifications ==
== Other harddisc solutions for the CPC ==
Modern:
* [[SYMBiFACE IIAlbireo]] (IDESD card)
* [[CPC-IDE]] (IDE)
* [[HDCPC]] (IDE)
* [[IDE8255]] (IDE)
* [[M4 Board]] (SD card)
* [[SYMBiFACE II]] (IDE)
* [[SYMBiFACE III]] (USB, SD card)
* [[X-MASS]] (IDE)
== Promo (summary) (english) ==
* Controller: Seagate ST11M XT-controler.
* Harddisc: 20 MB (3.5" Seagate, NEC, Kyocera, or Miniscribe)
* X-DDOS 2.10 (selectable in ROM bank 1-7)
* 4 Partitions of 5152 KB (5 MB) (accessible as Drive D: to G:)
* 512 Directory entries per partition
* support for CP/M 2.2 with 63K TPA (requires 128 KB RAM), and for CP/M Plus
* support for Softwareclock and TIMEROM+ (Real Time Clock under CP/M Plus)
* Price: DM 1100.- (approx. 562 Euros)
== Promo (German) ==
<gallery caption="Dobbertin Festplatte">
Image:Dobbertin festplatte page1.jpg|Frontpage
Image:Dobbertin festplatte page2.jpg|Contents
</gallery>
== Downloads == * [[CategoryMedia:HardwareLayouts on Eagle.zip|Layouts on Eagle.zip]] * [[CategoryMedia:PeripheralsGALs.zip|GALs.zip]]* [[Media:DobbertinHDInterface_Disk.zip|Dobbertin HD Interface Driver disc.zip]] == Links == * ftp://ftp.seagate.com/techsuppt/controllers/st11m-r.txt* http://hardware.speccy.org/temp/Amstrad-DiscoDuro.html* http://heathkit.garlanger.com/companies/ShugartAssociates/sasi_r0a.pdf* WD1002-SHD datasheet (fewer commands, similar to commands used by Dobbertin)* http://bitsavers.trailing-edge.com/pdf/sms/pc/OMTI_5510_Winchester_Controller_Jun85.pdf (more commands, similar to Dobbertin in registers and commands)* https://www.lo-tech.co.uk/w/index.php?title=Seagate_ST11M_Installation_Guide&oldid=480 [[Category:DATA Storage]] [[Category:FutureOS]] [[Category:Peripherals]]