16 Jan
2011
16 Jan
'11
10:36 a.m.
On 16 Jan 2011 at 13:38, Pete Turnbull wrote:
I'm sitting here with a brand-new FD235HF-A240 drive. Please point
me to the documentation for this model that notes the HF-to-HG jumper-
-or for that matter, what any of the option pads S1-S6 do.
All the best,
Chuck
We've been discussing the general case of index
pulses being masked,
in relation to the /READY signal. This thread wasn't specifically
about 3" drives, it was about the interface, even though Philip asked
in relation to a particular drive. You yourself made comments
referring to 8"drives ;-)
To quote Phil's original message.
"I'm (slowly!) working through the rebuild of one of the Amstrad
drives (an EME231 I know to have working mechanical components,
potentially good heads, and a fried control board), and I'm stuck on
deciding how to deal with the READY output."
My comment on 8" was to the effect of saying that (1) 8" drive
schematics are available online (2) that all 8" drives to my
knowledge have READY outputs and (3) few 8" drives use undocumented
custom ICs to derive this ready signal. Therefore, it would seem to
be a good resource for inspecting the legacy way of getting a READY
signal.
For example,
one can convert several models of the FD235HF to
operate as FD235HG by changing the setting of the pads at S4.
As noted in the docs :-)