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Re: EDD + CARD
- Subject: Re: EDD + CARD
- From: eeastman@apple2.com
- Date: Wed, 24 Jul 2002 07:47:01 -0500
- Newsgroups: comp.sys.apple2
- Organization: University of Nebraska-Lincoln
- References: <ahlnq8$nu5$1@lust.ihug.co.nz>
- Xref: archiver1.google.com comp.sys.apple2:21551
That is a hardware device designed to allow you to accurately copy any
Apple II floppy disk. EDD is for the Essential Data Duplicator program.
The Apple II drive does not read consecutive zeros accurately and many
copy protection schemes use that to 'mark' the disk. This mark can be
very difficult to detect and duplicate. This card is not common. I
would love to have that card if you can't find a use for it.
Thankx,
Ed
Adam wrote:
>it has a card marked: EDD + CARD 1986 C. ROSENBURG
> Whatever it is, this is apparently Revision B, dated 20/8/85. Anyway, it provides the IIe with two DB19 ports, one male, one female both on the end of a single multicoloured ribbon cable. None of the periphials I got with the IIe seem to utilise it.