The insurance settlement was such that anything that I was to be compensated for, they had to take away to discard. So it was either keep it and risk it not working again and not getting anything, or get compensated and go buy a new one.

That thing always annoyed me because it didn't work with GALs ...

Cool. I see the SST39VF010-70-4C-NHE at Mouser, 128KB, 70ns access time, and cheap.

But what does one use for a programmer for such PLCC flash chips?

My EPROM programmer was destroyed in a flood last year, so need to replace it.

Cool. Tho PLCC isn't breadboard friendly.

So I was _thinking_ of attempting a 3v system. But it appears that I'm doomed really on account of the fact that there seems to be no through-hole EPROM or NVRAM type chips with a parallel interface and 3v supply voltage.

So now it looks like I've ordered this 3v only CPLD module but won't really ...

Well, just ordered a couple of these. I'll see what I can do with them, at least to prototype on breadboard. Once I'm more confident with them maybe I'd just try my hand at SMT soldering and get something with more pins.

At a minimum it'd be 816 data bus demultiplexing stuff + address decoder. Chip has I believe, 33 I/Os (XC2C64A VQ44). So about the same as yours. More pins would surely be nice. Too bad they don't make a 48 or even 64-pin version of this. The next thing up from them in this vein are two 48-pins that ...

Has anybody looked at using this for address decoding, 816 bus demultiplexing, etc.?

https://store.digilentinc.com/cmod-c2-breadboardable-coolrunner-ii-cpld-module/

Not super cheap, but DIP-type package, breadboardable, 40 pins, has the JTAG etc. bolted on, and once one proves out the design one ...

The Propeller has semaphor type mechanisms to wait on signals from other cogs.

But the Propeller II (in final stages of development, available on FPGA right now) has interrupts as well. And 16 cores instead of 8, a higher clock rate, way more I/Os, and each I/O can be a ADC or DAC as well.

This is where the Parallax Propeller really shines as a microcontroller. It doesn't provide interrupts (though the next version will) but it gives you 8 "cogs" (processor cores) which are capable of running completely in parallel each on their own 80mhz clock. You can do some amazing hard realtime ...

Nice work on the daughter board, I have an EagleCAD schematic and layout for a similar board with 4 x 512KB SRAM and 512KB of flash, but never finished it.

What did you use for layout? I'm curious about positioning of the header, etc.

I have written a Python class for communicating with the ...

65c265 has BE and RDY. Same as 816 it seems.

And also a special interrupt driven "parallel interface bus" specifically designed for multiprocessor systems. Badly documented.

Dr Jefyll, on this sort-of topic, I came across your post here: http://anycpu.org/forum/viewtopic.php?f=20&p=43

I like the idea of board. Would you be interested in publishing full schematics? Make a PCB? I have a few HD6309s lying around here. It'd be neat to build.

Even more interesting would be ...

It's too bad chips like this: http://www.ebay.ca/itm/8-uPD41264C-DUAL-PORT-VIDEO-RAM-64Kx4-256x4-155-40ns-5V-0-4-DIP-24-DRAM-VRAM-/221594789095 aren't in active production anymore.

Regular DRAM access by the CPU on one side, and simultaneous serial output on another. (http://www.datasheet-pdf.com ...

What I don't get about the Cheap Video Cookbook technique (I just got this book, after reading through this thread, still digesting) is that during video output it's basically just using the MPU as a counter -- kludging the PC to be a simple 16-bit counter. Why not just use a couple chained 74 ...

Cheap Video Cookbook details how to do CPU driven video from a 6502/6800 type CPU.

But it's really low resolution.