23 Jul
2024
23 Jul
'24
8:24 a.m.
On 7/22/24 21:41, Ethan Dicks via cctalk wrote:
On Mon, Jul 22, 2024 at 9:05 PM Igor via cctalk
<cctalk(a)classiccmp.org> wrote:
> Me and my buddy are building an Apple I replica, for now successfully.
> Recently we have tested the video signal :) However, we are having big
> problems (as you can imagine) with finding Signetics 2519 chips. I know
> many ordered them in bulk, so I would be thankful for any help (we have US
> address) or information.
I would think that a Xilinx 95xx CPLD could be programmed to
do this job. The chip doesn't have a lot of pins. The
XC95288XL has 288 FFs, so it can do the job (the 2519 has
240 FFs.)
You could also probably use a small FPGA to do this as well.
They usually have more FFs per cell than CPLDs.
Jon