14 Oct
2015
14 Oct
'15
12:45 p.m.
On 2015-Oct-14, at 11:12 AM, Mouse wrote:
The hardest
part is finding parts for the FPGA, sure I can use 74XXX
but was it out in 1975-76?
If you mean some specific 74-series part, well, it depends on which
one.
But, if you mean 74-series logic in general, I think so. Sometime
within a year or so of '78, I was working with the stuff, and it was as
an undergrad, so I doubt I would have been working with just-released
logic. From original sources/refs I have kicking around:
- The first 54xx devices were introduced by TI in 1965.
- 74xx was around by 1966.
- H & L was around by 1969.
- S was around by 1971.
- LS was around by 1973.
- ALS was around by 1981. I have a vague recollection of seeing ALS parts with 79 date
codes.
I suspect ben(OP) was alluding to when now-current or last-current TTL was introduced.