The DIL parts are supposed to exist, but I've never seen them. Perhaps the lack
of pins for crystal oscillators explains that.
Dick
----- Original Message -----
From: "Tony Duell" <ard_at_p850ug1.demon.co.uk>
To: <classiccmp_at_classiccmp.org>
Sent: Saturday, October 06, 2001 2:14 PM
Subject: Re: 6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd
> >
> > If you use the WD37C65, (available, yet today, via Rochester Electronics)
though
> > you do have to use two crystals to cover the range of needed clocks, it is
>
> You only need 1 of the 2 crystals if you want the 300kbps data rate.
> That's what you get if you read normal 5.25" disks in a HD disk drive
> (which rotates at 360rpm, not 300 rpm like most other drives).
>
> The other crystal (which is always needed) gives you the 250kbps and
> 500kbps data rates which may be all you need.
>
> IIRC the PLCC part has built-in oscillator circuits (just add the
> crystals) and the DIL part needs TTL-level clocks (there arent' enough
> pins to have 2 for each crystal on the DIL package), but I might be
> thinking of some other chip.
>
> -tony
>
>
Received on Sat Oct 06 2001 - 16:32:45 BST