PC Engine dev forum

Thx!
And here's a new batch of links :

• Quick-and-Dirty ROM Dumping
• Parallel eeprom programmer
• Parallel Port Eprom Programmer

I think it may be possible to avoid using a microcontroller by using a FTDI 245R. Hmm gotta buy one

"How MOS 6502 Illegal Opcodes really work" (from pagetable.com)

Thanks for the cool link Tanuki!

In the comments for that article there is a link to a guy who augmented the 65C02's illegal instructions (which were converted to NOPs) to implement entirely new functions based on external microcode and other crazy stuff:

http://laughtonelectronics.com/arcana/B ... onPg1.html

This may be the most awesome thing you can do with a 65C02 ever. It's sort of a dense read but just incredible. I wonder how long it took to design and debug the whole thing.

I am on a roll tonight! Sony's semiconductor division has a lightweight technical journal of sorts ("CX-NEWS") where they discuss new parts. And they have ~50 issues online now:

http://www.sony.net/Products/SC-HP/cx_n ... umber.html

Lots of interesting stuff in here, you can see the trends in memory, Sony audio products (MiniDisc, etc.) over the years, and little known weird things like the successor to the SNES SPC700 CPU, the SPC700αII.

I think NEC has or had a similar set of journals on their Japanese website. Any idea if it still exists or is archived somewhere?

I wonder what the origin of the name comes from, as all the Sony chips have the prefix CX as well...

Thanks for the link.

Charles MacDonald wrote:I think NEC has or had a similar set of journals on their Japanese website. Any idea if it still exists or is archived somewhere?

It's a mystery... I really don't know.

next:
"Retrocomputing on an FPGA"
by Edwards, Stephen A. (2009-01-12)

Tanuki : nice link

Here's a bunch of other ones. There's not much to read but they might be useful.

• FabISP an in-system programmer for AVR microcontrollers
• A set of oldschool fonts

"Study of the techniques for emulation programming"
by Victor Moya del Barrio (2001)

"Dynamic Re-compilation of Binary RISC Code for CISC Architectures"
by Michael Steil (2004)

The dynamic recompilation document seems useful. Thanks.