Quote:
Originally Posted by SiriusHardware
It's also worth remembering that 74S571s are not the only pin compatible PROMs which can be used in the MK14, here, courtesy of mikesarcade.com, is a cross reference list showing a number of compatible types. The 'TS' at far left signfifies these are all tri-state output types, there are others with the same pinout which have open-collector outputs and would not be suitable for the MK14.
Code:
Signetics MMI TI Harris Raytheon AMD National Intel
--------- --- -- ------ -------- --- -------- -----
TS 82S131 (50ns) 6306-1 - 7621-5 29611 27S13 74S571 3622
82S131A(30ns) 63S241 - 7621A - 27S13A 74S571A 3622A
The Tesla version of the 74S571 (=MH74S571) presents a particular problem because hardly any current or historic device programmers can programme them. |
That’s very useful, I might be able to get 82s131 or 7621. I didn’t check the price yet. Any ideas which might be easier to program?