AVR Freaks

22V10s are still being made (by Lattice Semi, among others), and come in several zillion varieties of low voltage, low power, cost, package, and high speed.  The programming language I use is ABEL(5).  Converting from PALASM (yes, I have a few of those lying around) is a matter of find'n'replace and a bit of wrapper tinkering.  VHDL or Verilog for a PAL strikes me as wacky overkill.  S.

That's a combination that has been left behind by progress.

SPLD like 16L8, 16V8, 22V10 are not really designed for In System program. 

You can in system program the smaller CPLDs, like ATF1502ASL which is 5V and comes in PLCC44 and TQFP44,

or parts like LC4032 from lattice or XC2C32 from Xilinx, but those are 3v3 only. 

There are ATF22V10CZ parts that need uA static, but their cost/logic is not great.

You need to dig a little in the GreenPAK, most of their early parts are OTP, as their market is large volumes, but they are expanding.

The closest to what you want is their new EEPROM parts with i2c programming  SLG46824  &  SLG46826 - those come in TSSOP20, 2.5 ~ 5.0 Vcc  68c/100 Mouser has stock.

Or there is even a SLG46824V-DIP  SLG46824V GreenPAK Programmable Mixed Signal Matrix 20-Pin DIP Prototyping that is ~ $2

https://www.dialog-semiconductor...

GreenPAK are also expanding with this ForgeFPGA line in 2022

https://www.edacafe.com/nbc/arti...

https://www.dialog-semiconductor...

but I've not seen Vcc range info for ForgeFPGA yet, and I suspect it will be low supply and similar to Lattice iCE40 series in voltage/package/capability.

Yep.  In a 22V10 all registers are optional.  Note, however, there is variable width on the outbound OR gates, depending upon which pin you use.

Not enough pins, basically.  And not enough logic.  That's CPLD or FPGA territory.  And 22V10s are still made in DIP and PLCC (readily socketable - and with ZIF sockets for the programmer) forms.   S.

Must admit I quit using discrete logic chips (with a few exceptions) in the 16[R/L][2/4/6/8/8] days (before the turn of the century), all in 20-pin DIPs.  A 24-pin 22V10 was a huge upgrade!  And they and the new 16V8s were reprogrammable!  No more throwing entire chipsets away!  Then off to XC9500s for even more powerful boards, but Xilinx quit making them, and I've really moved almost entirely into microcontrollers.  As wesfw pointed out, there's not very often a reason to go faster than that...  and the answer there is usually* "a faster MCU"     S.

* Yeah, for really wacko stuff there's FPGAs.  They're beastly fast, and can do things in weird bus widths (should you feel so inclined...).

That was actually ME, replying to barnacle.    You may have gotten your nested quotations confused.  S.

If you really want to demonstrate logic, build a Babbage engine.    Static power consumption zero, dynamic power consumption limited by how hard you feel like cranking it!  Surface-mount, too - I recommend a thick concrete surface.    S.