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Re: Are there any 65816 card schematics?
Sean Fahey wrote:
> To: Tristan Mumford
> There are two kinds of 65816 options (generally speaking).
>
> The first type is the slotted variety - which can either work
> cooperatively with the rest of the system or it completely takes over the
> system when active. These options tend to be software driven and therefore
> not very compatible with
> other applications except those that are written/patched to support it.
> These
> kinds of cards are generally intended for cross-platform development,
> scientific analysis or some other "high-end" computing task.
I seem to recall hearing about a Z80 card that cooperatively used the
system. It needed complex software. Sort of like the C64 CPM cart. It was
up to the 6510 to handle interrupts still (I think).
Are the complete system takeover style cards still a slave to needing custom
patched software while the '816 is running in 6502 compatibility mode?
>
> The other 816 option is the processor replacement - and here we have a
> couple of sub-options.... some accelerators for the 8 bit II took an 816
> no problem - and while you could execute those extra ops, strange things
> may happen, plus you could only address the usual RAM locations.
>
> Then there are the socket boards - like the Applied Engineering 816, which
> is a board that mounts over, and replaces the 6502. It has strap cables
> that can be hooked up to a RamWorks card and... if I read correctly, a
> Ramfactor board... which would give it 2-8MB accessible RAM.
>
> I have one of those AE cards, and it may get cloned eventually.
They sound pretty good.
Memory addressability is the main issue though. Like I said in another post
I could just make a banked memory card, but... well, I just don't want to
do it that way :)
Apart from when I'm just messing around on it, it'd be running a custom
build of Contiki. There would be a fairly noninteractive (to the local
user) server app. Either the multiplayer 'vaguely roguelike' game I started
writing for this purpose at the beginning of the year, or something else as
yet undecided.
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