You need TL866II Plus to program ATF22V10. It has no JTAG so can’t program with ATF150x programmer.

You will be more constrained by the number of available I/O pins than the logic capacity.

Speaking of demuxing the bank bits, that is a task better performed in a CPLD than a GAL, in my opinion.  Setting up transparent latches in CUPL is pretty simple with a CPLD when using buried logic...

Code:

pinnode   = extram;     /* extended address latch */

extram.LE = PHI1;       /* open bank latch        */
extram.L  = PHI1 & D0;  /* capture A16 on Ø2 low  */

A16       = extram;     /* drive A16              */

The above is an example that latches A16 from D0—it would be used in a system with 128 KB of RAM.  The PINNODE statement declares extram to be a buried node. The extram.LE and extram.L statements tell CUPL that the extram node is a transparent latch.  extram.LE opens the latch when PHI1 is true (PHI1 is the inverted Ø2 clock signal), and extram.L is the latch itself.

The above arrangement works on the same principle as a discrete latch, such as a 74AHC573.  Note that if you are going to use a bus transceiver on the 816’s data bus, the DO signal must be derived from the 816 side of the transceiver, since the transceiver will be in the high-Z state during Ø2 low.

The preceding code may be expanded to work with more RAM with some minor changes...

Code:

pinnode         = [extram3..0];  /* bank bit latches   */

[extram3..0].LE = PHI1;          /* open latches on Ø1 */
[extram3..0].L  = [D3..0];       /* capture A16-A19    */

[A19...16]      = [extram3..0];  /* drive A16-A19      */

The above would be support a system with 1 MB of RAM.

It's really amazing how flexible these things are; can really get down into the nitty gritty details and configuration options.
Jonathan

ATF1502 is pin-compatible with ATF1504, in fact it is also pin compatible with EPM7032S and EPM7064S. Doing address decodes and data latches, you won't have problem with smaller ATF1502, but if you decided to have more complex functions like internal ROM, serial port, I2C, etc, then you can always get the larger ATF1504 without changing the PCB design.

PCB manufacturers produce 10 pc boards for $5, so I have a design idea with CPLD that allows 10 different functions by changing CPLD designs and moving some jumpers around.
Bill
PS, W65C02 and W65C816 are so similar physically, you can easily accommodate both on the same PCB by changing CPLD equations.

Just out of curiosity, where do you order your PCBs from? I've used JLCPCB, and it got really expensive, really fast.

Jonathan

so what size were you trying to do that it got to expensive for you?

However - also consider what you're getting - could I have envisaged 5 PCBs for that price even 20 year ago? No way. And that's the issue - things like the Raspberry Pi being almost too cheap have forced everyone into a race to the bottom of the barrel.

-Gordon

This guy, here

What about your design tools? I've only ever used EasyEDA.

one option: you could try to be lazy like me, in your CAD program put all the ICs on the board with around 200-300mils of space between them, make sure the ratsnest isn't too bad, and then let an autorouter like freerouting do the rest.
and if you're wondering about the quality of the routing job, let's just say that both my 65816 and 65C02 boards run at ~20MHz and 99% of the routing was done by the autorouter.

I just sent out 4 designs to JLCPCB, all 100mmx100mm, 20 4-layer boards, 5 2-layer. DHL shipping, $60 total. They all have CPLD which is critical in reducing board size, so are SMT package. Also pack your board as tight as the auto router will handle, and combine multiple designs in one order. This is 100x100mm 68040 with CPLD at back and TQFP-80 quad serial device.
Bill