24 May
2017
24 May
'17
12:49 p.m.
On 5/24/17 3:35 PM, Chuck Guzis via cctalk wrote:
On 05/24/2017 11:19 AM, ben via cctalk wrote:
Its why I keep all my old machines. We have
an understanding, that is I
understand them fully, hardware and software.
Oddly the assumption is 16 bit, PDP-11, why not DG Nova, TI990.
Could easily be 8 bit, 12bit, 18 bit as well.
But who wants to write the software?
Yes,
just so. I learned about that one decades ago.
I am building a 1977 ttl style computer because
now I have spare time.
Finding vintage or similar devices is being a challenge as well fighting
modern OS to have even a C compiler and a TEXT editor.
Technology is not better, just cheaper
Modern technology is not only cheaper, but
it's faster and uses less
power--and is usually more flexible. I suspect that a PDP-11 in FPGA is quite a bit more
reliable than the
real thing--and when you're done you have a nice abstract description of
the hardware in VHDL format.
And yes, I have a pile of old CMOS/ECL/TTL logic.
And Germanium transistors...
Remember when CMOS logic was new-- +15V Vdd and 1MHz
top speed?
--Chuck
I remember when RTL was new and uRTL was a later improvement.
Allison