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On Tue, 23 Apr 2024 18:44:24 -0700, Don YBut those devices won't be of the same (fast) speed grade as the
<blockedofcourse@foo.invalid> wrote:
On 4/23/2024 2:40 PM, boB wrote:Yes, I know. Address decoders are a dime a dozen (almost) and anyI miss playing with my old home built S-100 CP/M computer around 1980.>
Those were really the fun days of computing and digital logic
circuits.
Nowadays, the Zx80's appeal would be in controlling things.
There's little that you can't now do *better* that you would
previously have used a CP/M box for.
>The other day after hearing the demise of the Z80, I ordered 2 of the>
20 MHz Z80 40 pin devices. I did not even know there was a 20 MHz
version. Not sure what I will ever do with them but who knows ?
Maybe I'll just look at them.
Again, in the context of "control" (i.e., deeply embedded),
you would likely also need similar speed grade peripherals
to do anything.
other peripherals can either be made or, I may actually have the
others laying around. I save old ICs and have since the 1970s.
The 180 gave you a seamless way to get to 1M of program+data.I had a particular fondness for the '180 (and '7180!) as itWasn't familiar with those 2. Yes, I would run out of code space with
wasn't crippled by the tiny address space (64K memory + 64K I/O)
of the Z80. Over the years, I've come to realize that you usually
need more space for *code* than data!
many micro controllers. The was always programmed in assembler and
code was fairly smalll at that time. Amazing we were able to get
along with less than 64K !
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