Re: How much of a ][ is needed to twitch?

[Tristan Mumford <xtristan.xmumford@xgmail.xcom>]

mdj wrote:

> On Feb 12, 10:04 am, "Michael J. Mahon" <mjma...@aol.com> wrote:
> 
>> > If the CPU is fried it's a nuisance but no big deal. The 65816 should
>> > work, and they are relatively inexpensive (although it would probably
>> > be a few months before I could get even that).
>>
>> IIRC, the 65816 cannot be expected to work in a ][.  The 65802 would
>> work, but is no longer manufactured.
> 
> A 65802 *might* work - Apple II's and early clones are somewhat
> finicky with their timing, and as a result the CMOS parts often fail
> to operate without swapping a couple of other LS parts for faster
> HC's.

If it weren't for potential problems with upsetting propagation delays and
timing in general, I'd happily replace all the LS's with HCs. Although it
seems a bit pointless.

It's one of the reasons I was asking about schematics anyway. To do my own
clone utilising more modern standard parts like a single 64k SRAM, a single
ROM etc. Of course that would be in the future

> 
> I'd recommend not trying it until the machine works correctly to avoid
> introducing another problem. Tristan - if you need a spare '02 drop me
> an email with your snail mail address and I'll send you one - I've got
> quite a number of them sitting around.

Hopefully it won't come to that. I'm actually more worried about sourcing
the RAM.

-- 
-----> http://members.dodo.com.au/~izabellion1/tristan/index.html <-----
=====       It's not pretty, it's not great, but it is mine.       =====