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Re: Pinout Voltage on IIc Disk Drive Port

Subject: Re: Pinout Voltage on IIc Disk Drive Port
From: Patrick Schaefer <patrick.schaefer@topmail.de>
Date: 2000/07/31
Newsgroups: comp.sys.apple2
Organization: Forschungszentrum Juelich GmbH
References: <rpPd5.69$fi.524489@dca1-nnrp1.news.digex.net> <1ee52m7.9rawmw153dmc5N%dempson@actrix.gen.nz> <964224934.214048@inv.ihug.co.nz> <39849295.8189DA3F@rconnect.com>

Ross Holmberg schrieb:

> That can't be right.... The Mac-LC lab at SSU, MN was home to many IIe cards
> for mac driving DiskII drives.
>     Perhaps there were multiple revisions?

There may be some engineers working there :-)

If you add a -12V supply to your card, the Disk II will run. The LC
doesn't provide -12V (only -5V for Appletalk), but you can add an
external supply. Or build a TL7660-based inverter for the +12V line.


Patrick

References:
- Pinout Voltage on IIc Disk Drive Port
  - From: "Frank Townsend" <ftownsen@iamdigex.net>
- Re: Pinout Voltage on IIc Disk Drive Port
  - From: dempson@actrix.gen.nz (David Empson)
- Re: Pinout Voltage on IIc Disk Drive Port
  - From: "Roger Johnstone" <rojaws@es.co.nz>
- Re: Pinout Voltage on IIc Disk Drive Port
  - From: Ross Holmberg <holmberw@rconnect.com>

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