From: Poul-Henning Kamp [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP8568B firware eproms anyone ?
Date: Thu, 19 Oct 2006 11:47:52 +
Message-ID: [EMAIL PROTECTED]
Poul-Henning,
http://phk.freebsd.dk/misc/8568b_flash.png
Somebody at Agilent will cry if they see this :-)
But it works,
On Thu, 19 Oct 2006 11:47:52 +, Poul-Henning Kamp
[EMAIL PROTECTED] wrote:
But it works, thanks a bundle for the help!
Poul-Henning
Umm, I don't think specifically we heard that you got the ROM image you
were looking for. Assuming you must have, the adaptation of the chips is
something that
In message [EMAIL PROTECTED], Rex writes:
On Thu, 19 Oct 2006 11:47:52 +, Poul-Henning Kamp
[EMAIL PROTECTED] wrote:
But it works, thanks a bundle for the help!
Poul-Henning
Umm, I don't think specifically we heard that you got the ROM image you
were looking for. Assuming you must have, the
I have participated the past few years mostly with the N8UR multi-op group.
My setup is as follows:
1. Receiver: Icom IC-745 or the Yaesu FT-100D (I threatened to use a
Hallicrafters SX-25 one year)
2. PC with sound card running DL4YHF's Spectrum Lab for the FFT work. The
receiver audio feeds
Hello,
The Energy Policy Act of 2005 established that beginning in 2007, daylight
saving time is extended one month and begins for most of the United
Stateson the Second Sunday in March and ends on the first Sunday of
November.
With that, should I be concerned that systems may be affected by
Jared,
NTP works on UTC so daylight savings changes etc not applicable.
However, on the question of dates of daylight saving changeover, it would be
nice if the US got in sync with UK Europe!
;-(
Rob Kimberley
- Original Message -
From: Jared Morrisen [EMAIL PROTECTED]
To:
In message: [EMAIL PROTECTED]
Rob Kimberley [EMAIL PROTECTED] writes:
: NTP works on UTC so daylight savings changes etc not applicable.
:
: However, on the question of dates of daylight saving changeover, it would be
: nice if the US got in sync with UK Europe!
but many systems
Heh, that's great. Interesting that at least some CMOS parts will work. I
may have had some bad chips, but the same ones that failed in an 8566B
worked fine in a 494AP.
Not knowing what happens if an address line toggles in the middle of a read
cycle, I wonder if it'd be a good idea to tie
In message [EMAIL PROTECTED], John Miles writes:
Heh, that's great. Interesting that at least some CMOS parts will work. I
may have had some bad chips, but the same ones that failed in an 8566B
worked fine in a 494AP.
Not knowing what happens if an address line toggles in the middle of a read
My kind of guy :-)
Congratulations!
Reminds me a long time ago when building 120 audio amplifiers as part of
a college hobby gone crazy, I had laid out my PWB for mini-DIP (DIP8)
op-amps (uA709, because that's all there existed back then), with the
frequency compensation caps at each end of
Many CMOS chips draw higher supply current with floating inputs, as the
internal buffers may bias themselves in the middle of the range, where
both transistors are turned on. That may lead to increased temperature
and failure over time. In many cases, floating inputs will simply toggle
as a
Actually, since each EPROM is now 4x bigger than necessary, couldn't you do
all this with just one chip? The circuit must be decoding a couple of
high-order address lines to drive the chip-select pins of the other three
EPROMs, so you'd just tie those two address lines to the unused address pins
Doh, never mind that, I'll bet that the 68000 is going to want to fetch 16
bits at a time, or maybe 32.
-- john, KE5FX
-Original Message-
From: John Miles [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 19, 2006 5:50 PM
To: Discussion of precise time and frequency measurement
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