silverdr_at_wfmh.org.pl
Date: 2008-11-11 23:03:02
On 2008-11-07, at 07:56, <ruud.baltissen@apg.nl>
<ruud.baltissen@apg.nl> wrote:
> Hallo Jim,
>
>
>> On powerup, an onboard uC will ....
>
> If you allow me to add an idea: why not monitoring the RESET line?
> Otherwise I have to power-cycle the C= every time I want to change the
> image. A reset is more friendly for the electronics.
>
>
>> I have two goals. A Software ROM that can be loaded with kernals
>> of your choice,
>
> With all respect, what is the added value for the average user?
Ruud, I very rarely disagree with you but this time I do. Here is why:
1. I believe _we_ are the "average users" these days. Why Do I think
so? well, how many non-dinosaur-geeks you know who are still (any kind
of) users of this fine, yet obsolete machinery? Our children and
families do not count, we know why... ;-)
> How many
> kernals will someone use? I myself use three, which fit in one 27256.
2. Me too _but_ I would very much like to have many more at my
disposal without the need of re-programming the EPROM again. Of course
I could put "all of them" into several switchable chips but then there
will always be that one more that I haven't found earlier. F.e. the
"proper" Speeddos, which I have a number of differently spoiled
versions but none in the pristine state.
> A
> 27512 can contain up to eight. A small trick allows you to use a
> 27256/27512 in a C128 having 3/7 kernals at your disposal. Only some
> dipswitches are needed to choose the wanted Kernal.
3. Sure, but 1) see above, and 2) isn't it much more fun to push reset
with a key combination (Jim, please don't use those key combos, which
are reserved by DolphinDOS :-) I suggest F1+F7) and choose one from
the menu at will?! My geeky dino soul is really enthusiastic about
such possibility!
> For developers it certainly has a value: the device can be used to
> develop new kernals, games or whatever.
Exactly!
> But then IMHO a SD-card should
> be used; extracting and refitting a FlashROM every time has it risks.
> (FYI: I put a textool socket in my 1541 to be able to test new kernals
> for the harddisk project)
Wouldn't it also in your case be just easier to put it there once and
simply update it with new version for testing?
To Jim: I very much like the idea but am wondering why are you so much
concerned about the footprint? My KERNAL EPROM adapter with its EPROMS
is much bigger than the original ROM, yet I don't find it disturbing
in any way. Of course there is a limit to how big and high it can be
but (as Ruud suggested) putting in a small USB port (like SIO2IDE f.
e.) to mount and manage the content of the flash is IMHO really
tempting. Sure again - it might be more geeky to have ISP via 64 (a
'la IDE64 f. e.) but wouldn't it be more difficult to realise/code at
this stage? I assume you don't have that part of code also ready
somewhere...
Good luck, and put me on the waiting list for a working one!
P.
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