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Dobbertin Harddisc - CPCWiki
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Last modified on 1 October 2010, at 16:03

Dobbertin Harddisc

Revision as of 16:03, 1 October 2010 by TFM (Talk | contribs)

Dobbertin Logo

A harddisc manufactured by the German company Dobbertin.

One of the first ways to connect a Harddisc to the CPC. The Dobbertin harddisc has a capacity of 20 MB. The disc was partitioned in four partitions of 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 partition (including date and time stamps under CP/M Plus).

Reviewed in Amstrad Computer User.

Pictures

  • Dobbertin 20 Mb Harddisc

  • Dobbertin 20 Mb Harddisc

  • Dobbertin 20 Mb Harddisc interface

  • Inside 1

  • Inside 2

  • Inside 3

  • Inside 4

Disc

  • Dobbertin 20 Mb Harddisc (the driver disc, not the harddisc)

  • HD20 Dobbertin CPC Harddisk side B

  • HD20 Dobbertin CPC Harddisk side A

Software using the Dobbertin Harddrive

  • In addition a lot of (cracked) games have been able to run from the HD-20 hard disc

Technical

Uses X-DDOS v2.10 (which supports the harddisc, and additionally supports external double sided 80track disc drives). The 20MB harddisc is split into four partitions, with drive names D, E, F, and G (drive name C isn't used here, but may be used as RAM disc, in combination with Dobbertin RAM expansion). I/O Ports: 

 #FBE0  Dobbertin Harddisc Data Port
 #FBE1  Dobbertin Harddisc Status, Reset
 #FBE2  Dobbertin Harddisc Select, Configuration
 #FBE3  Dobbertin Harddisc DMA, Interrupt
 #FBE4  Dobbertin Harddisc Reset

Other harddisc solutions for the CPC

Modern:

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.-

Promo (german)

  • Dobbertin Festplatte

  • Frontpage

  • Contents