Date   : Thu, 11 Jan 2007 16:16:21 -0000 (GMT)
From   : splodge@... (Richard Gellman)
Subject: 8-bit IDE not interfacing

Hi,

My mailserver farted this morning, so I have no idea if anyone replied to
my email! (the problem meant incoming mail was being discarded rather than
temporarily rejected).

If anyone did reply to this between 00:00 and 12:00 today, could they
forward it to me directly? Thanks.

-- Richard

> Hi,
>
> This email is mostly directed at Jonathan Harston, since its his circuit
> I've built, but all input is welcomed...
>
> I've built the 8-bit IDE interface, and connected it up. I soft-loaded
> ADFS 1.53 into sideways RAM (until my EPROM issues get sorted) and...
> nothing.
>
> Some probing on the 1Mhz bus side of the interface shows A0/1/2/5/6/7
> are operating, R/W is operating, and a clock is present on 1MhzE. The
> IDE drive resets as expected on BREAK, but the NPGFC line I can't seem
> to get a reading on. Both my Master 128 and Model B show NPGC as
> hovering around 3.4V, whether the port is being read/written or not.
>
> Is the line supposed to read that way and I'm just missing a vital bit
> of intepretative knowledge? I've checked and rechecked the circuit 4
> times.. its in working order and matches the circuit diagram.
>
> Any thoughts?
>
> -- Richard
>
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