Re: I'm all for a beer fridge

["Laine Houghton" <laine@@@intergate.com>]

Scott ,
I never really looked for a source  of 6502s. I have a couple from upgrades
somewhere plus a dead mouse board which has one as well as several older
Commodore 5.25 disk drives which use them. I see the drives in the trash all
the time.

As far as your ram/rom stuff goes I'm looking forward to trying one of
these.
http://tinyurl.com/s2t0

They should be available soon. $10.00 @ 50K so I'm not sure what to expect
single piece.

They are 128K X 8 fast SRAM with shadow EPROM. Automatic save on power
outage and auto recall on power up.

A bit of over kill for your project but it could provide design and usage
flexibility.

Laine...


"Scott Alfter" <salfter@salfter.dyndns.org> wrote in message
news:tPSlb.33412$Rd4.17479@fed1read07...
As for me, I'm just getting started on a simple 6502-based controller for my
> beer fridges.  I have a IIe doing the job for one fridge right now...could
> tweak the software a bit to have it control more than one at a time, but
> some custom hardware would take less space.  Porting the software
shouldn't
> be too difficult...the bits that are already in assembly language would
only
> need minor tweaks, and the bits that are in BASIC are mostly
straightforward
> stuff that implements the UI (which will need replacement anyway) and some
> higher-level functionality (which I just haven't bothered rewriting in
> assembly yet).  16K of ROM (maybe more, maybe less), 8K of RAM, an LCD,
some
> buttons, and an interface to some temperature sensors and relay
controllers
> should do the job.  Some EEPROM to maintain settings through a power
outage
> would be nice...though since I'm using SRAM, maybe a battery on that would
> be sufficient.
>
> (Anyone know of a source for 6502s?  I thought I had one on hand from
> upgrading the IIe to an enhanced model, but that seems to have gone
missing.
> I have a "Sally" CPU that I salvaged from an Atari 5200...the pinout is
> slightly different, but it's mostly 6502-compatible.  I could design a
board
> to work with both, but if I end up building more than one, I'd need more
> processors and I'd rather not "kill" Apple IIs to get them.)