I do not dispute htat. My main comment was to the
poster who suggested an
ARM-based microocntroller (I have never seen seen such a device in a DIL
package)
There are always SMD to DIP adapters :)
Which normalyl cost more than the chips to put on them (at least in the
UK).
- I
can design a PCB at home using free tools (Kicad rulez!)
For the nth time, the
machien it runs on (and I susepct the OS it runs
under) are not free.
A Pentium III - which you can find in trashcans - runs it with linux.
And linux is free :)
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.
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.
Excellent (I
am not being sarcastic). Hwoever, building that equipment is
a project in itself (albeit an interesting one). If you just want to make
up a SCSI-drive rpelacement or whatever, why should you _have_ to make
the PCB stuff first?
I can always use perfoboard...or just connect the wires chip-to-chip.
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.
Why? As I said
in anotehr message, thsi is a hobby, why shouldn't I do it
the way I enjoy?
You can do in any way you want :) But when I do and for people being
able to reproduce it, I try to do it in the easiest way to most hobbists to
reproduce it. :)
I am actually wondering how on earth you can know what 'most hobbyists'
can do, or would want to do...
Fine. I was ismpoly pointing out that there are
people who ar
expeerienced in (say) Z80 assemblet and not AVR. In which case, for a
hobby project, why not use the former?
No problem. But why not use the later, since it is more powerful, has
No reason, if you want to, and you have the facilities to use it.
more built-in things and is easier to program (not
everyone has an eprom
programmer, emulator, eraser, etc) for most hobbysts
Looking around, I don;t think I can see _one_
machine here that could be
used for that. You mention a programmer conissiting of a few resistors
You don't have ONE PC on your home?
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...
ona a parellel port. I've got pletny of GPIB
ports here, but I guess
that's not what you meant. OK, what about an HP9817 with an HP98522 GPIO
card? It probably could program an Atmel processor, but I'll bet the
software doesn't exist...
The nice thing of open standards is that you can always roll your own :)
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.
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.
OK, so firtly you have to buy this tool [1] and
secondly I need a USB
host to control it.
Ah, come on Tony, P3 are throwaway itens...P4 are cheap as candy. A nice
Not round here...
post "I need a P4"will bring 3 or 4 to your
door. For free. Why not use new
technology? Linux drives that, you don't need to use windows. And if you get
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...
6303 in one of
its many varieants? 7811? COP400? 3870? Do I have to list
any more?
Was ist common?? When?
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.
Actually, the 8048 family is getting soemwhat hard to find now (AFAIL it
is no longer manufactured), and that one turns up _everywhere_.
Actually I disagree with that. It's often
easier to repari something with
lots of parts, where yoy only have to replace the one bit that's failed.
Which would you rather have to fix? An HP9830 (lots of TTL), a Sinclear
Spectrum (custom ULA) or a modern PC motherboard.
I can repair the three :) I can even recreate the speccy ULA in CPLD :)
So can I. So what? Which would you rather repair?
-tony