6502.org

Hi folks!

I wonder if any one uses the W65C265SXB board and can tell me if there is a way to program the flash chip in circuit. Perhaps by using the internal monitor or by plugging in some wires.

Having to take it out of its socket each time I want to update the code seems not very practical and although I own the required tools, there is some risk to damage the flash and board.

I still don't have the board but I am looking forward buying one. First I thought I would go for the W65C265QBX which may be easier to start with. But it seems a bit too limited.

Any thoughts?

Regards.

Yes, it is possible for the '265 to program the flash memory device on the board without removing it and with no hardware changes.
The monitor doesn't have routines for this, but you can load your own into RAM.
Look at the spec sheet of the flash device for more detail on what the program needs to do.

Some notes are at https://github.com/scotws/265SXB-Guide/ ... r/flash.md
A program to do it is at https://github.com/andrew-jacobs/w65c265sxb-hacker
Another thead about this is at viewtopic.php?f=4&t=4478

Great news! That will do the trick.

Thanks for pointing me into the right direction.

Can't wait to get my hands dirty.

Regards.

We also have this thread that talk a lot about this chip/board in general: viewtopic.php?f=1&t=3552

Hi whartung, thanks for the link.

Welcome, /RESET!

Just to note, it's absolutely fine on this forum to restart a thread from years ago, if the topic is the same.

It's quite difficult to search for the SXB because it has a long complicated name and people may have decided to shorten it - as I did just then. Or mis-spell it. Sometimes using your favourite search engine for [site:forum.6502.org sxb] will be a quicker way to find previous mentions, compared to using the forum's own search.

Hi BigEd!

thanks for the hint, I'll do that.

I actually ordered the W65C265QBX and the W65C265SXB together, but it will take still about 2 weeks until delivered.

In the mean time I am doing some basic research, like reading the "W65C265S Monitor ROM REFERENCE MANUAL"

Regards

Always read the manual! Do keep us updated with your experiments, progress, or projects, as the case may be.