Kryoflux or Catweasle

[ben]

On 5/24/2017 1:35 PM, Chuck Guzis via cctalk wrote:
> On 05/24/2017 11:19 AM, ben via cctalk wrote:
>
>> 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.

I am not to sure about that.
If a schematic has a bug you can use a logic probe to find the error.
With typo in VHDL you have hard problem finding that single gate
error.

> And yes, I have a pile of old CMOS/ECL/TTL logic.
>
> Remember when CMOS logic was new-- +15V Vdd and 1MHz top speed?
>
This is Canada. RADIO SHACK was your only place to get anything.
99 cents for 7400.
Ben.