2 Dec
2010
2 Dec
'10
10:08 p.m.
Which normalyl cost more than the chips to put on them
(at least in the
UK).
I usually make them at home :)
You keep on telling us that things are different
between Brazil and the
States, and what is common in one place is not common in the other. Whcih
I happily accept. All I can say is that the UK is different again. Or at
least I've enver found any form of Pentium PC for free. The latest PC
that I've been given was a battered 386SX that, I have to admit, I took
apart for useful bits.
Strange. I **though** "old" PCs in UK were as cheap as water. But I
still don't believe someone reading this won't give you as a gift an old P3
or even a P4. If I were near you I'd surely do that.
Also, not being a PC enthusiast, you have to relaise
that while I would
have things like HP-HIL keyboards and mice, HP 22kHz horizontal composte
monitors, and the like, I do not have spare PC/AT or PS/2 keyboards, PC
mice or VGA monitors.
I believe you would get a complete pack :)
Sure, do thast all the time. It's a little harder
(not I did not say
impossible, I do it all the time) with SMD pacakges though.
look for elm-chan.org, he does that all the time :) But as I told you,
there are adapters, blah blah blah :)
I am actually wondering how on earth you can know what
'most hobbyists'
can do, or would want to do...
- Keep it simple
- Keep it cheap
- Keep it reproductible in the easiest way
No reason, if you want to, and you have the facilities
to use it.
As there is no reason to the former ;)
It is my bitter esperience that a lot of thsee
parallel-port devices,
even those that have software that runs under MS-DOS, do not work
properly on a 4.77MHz PC/XT...
My keyboard runs faster than that... :oD
True, and contrary to some other people here, I do
like making my own
tools, whether they be mechancial tools, electronic tools (like test
equipment) or software tools. In fact _I_ am seriously looking at some of
the current microcotnrolelr families for use in projects. But this
doesn't mean everybody has to want to use them.
So they roll their own :)
FWIW, I was simply defending the right of some other
poster to build this
device using a Z80 and 8255s if he wants to. You don't like that desing?
Well, nobody is stopping you making your own.
I'm not against! You can do it however you want
For mt own (in)sanity, I want to unsderstand how
thigns should work, so
when (not if) they don't I have some chance of putting them right. I
guess that answers your question...
That is up to you. I have this notebook for some years, and it just
works. Although I love to know my tools, I can use some I don't know the
internal workings.
I have come across all of those microcontrollers in my
time. In fact I
was using something based on the 3870 (the HPIL-GPIO interface) and
reparing something containing a COP400 (HPIL knob input device -- in fact
jsut about all HP-HIL devices have COP400s in them) a couple of days ago.
HP does everything different :o)
Actually, the 8048 family is getting soemwhat hard to
find now (AFAIL it
is no longer manufactured), and that one turns up _everywhere_.
Ok, this one you are right. But as far as I remember, MCS-51 devices are
pin-compatible. And since they don't have code protection, I can always
download the code of a good 8048 and use a 8748 to replace it. I did it many
times in Kenwood TS-430's.
So can I. So what? Which would you rather repair?
The three of them :)