[sdiy] 4-bit encoder?

[john slee]

It is a weird choice of hill to die on.

8051 and Z80 are both 40+ years old and very much alive in 2020. PIC and
AVR families are, according to Wikipedia, 20+ years old, with PIC's origins
being much older.

And really the requirement when replacing a microcontroller isn't that the
replacement is identical; the requirement is that it operates identically.
Sonic Potions' TB-303 CPU replacement, for instance.

OTOH I started playing with modular synthesizers because I was spending too
much time staring at screens. So I can understand not wanting to spend
hours programming things.

John

On Tue, 13 Oct 2020 at 22:23, Gordonjcp <gordonjcp at gjcp.net> wrote:

> On Tue, Oct 13, 2020 at 12:19:29PM +0100, Gerry Murray wrote:
> > One major advantage that David Dixon has in his designs is that in 20
> years
> > time, someone plugs it in and it doesn't work, everything that makes it
> do
> > it's job is right there in plain sight and could be repaired.
> > Take any uProcessor driven design. In 20 years, plug it in and if it
> doesn't
> > work., it's for the trash.
>
> I mean, I'm currently repairing 40-year-old microcontroller based stuff
> that wasn't exactly spiffy new tech when I was in primary school, but okay.
>
> > So David is making something that has far greater longevity than , for
> > example, my precious midi message handler embedded in a Microchip 18F
> > microcontroller.
>
> Assuming you can get the chips, or anything remotely like them.  Look at
> how many logic IC are simply no longer available with no reasonable
> replacement, like 16-to-4 encoders.
>
> --
> Gordonjcp
>
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