Wow! Thanks so much everyone!

Hi all!

Anyone know if the forth rom in the R65F11 has been disassembled? I have a hard time finding it...

Thanks!

Doesn't 'bit' perform a logical and between the accumulator and an address? IIRC it leaves the carry intact?

[Edit: It doesn't change the accumulator. So you could do something else here? I.e. ASL/BIT $nnnn]

Oooh, I hadn't heard about that one! It looks like it's obsolete though but yeah, that'd be a nice solution :-) I'm using an FTDI 230x (always confuse that one with the flower delivery service) to talk to my PC which comes in at about $2 or so.. Alternatively, I could go with SPI flash to avoid the ...

Altera EPM7128SLC CPLD's for me and EPF10K10 FPGA's for TTL based stuff for me.. It's got about 68 pins usable and they're dirt-cheap on ebay ( $2 or thereabouts). They come in a variety of packages but I primarily use the 84 PLCC one. Make sure you get the 'S' part so you can use JTAG!

Yvo

It's not so much about the amount of storage but more so about compatibility. Most cards these days are int he GB range and you have to go really out of your way to find smaller ones. IIRC Windows doesn't even give you the option to use FAT16 on large cards, hence my FAT32 dilemma :-)

I do have a ...

Hi All!

Has anyone taken on the Hercules task of porting a FAT32 filesystem for the 6502? There's a bunch of code out there in C but erm, it's a lot.. I've done a simple FAT16 reader once that I *could* port over to 6502 but that kinda limits the amount of storage (then again, files aren't ...

Apologies for the late reply. Just read over all the replies (thanks for that!) and I'll clarify some of it. Single-stepping is considered easy as it's a single bit that triggers an IRQ after every instruction. In order to avoid single stepping your single-step routine, I could only allow that to ...

Hi All,

So I've been beavering away on a 6502 clone in verilog and cobbled together a simple assembler. Ideally, I'd like to write an IDE that allows you to put breakpoints in the source a la Visual Studio. While I get that the disassembler 'lies' to you, I wonder what the best way is to execute ...

Not expecting errors but in case there would be one, I was wondering if there was anything 'official' out there such as a nack and re-send or something. Thanks for the Intel Hex link.

FWIW, anyone know another protocol that also allows for reads/writes/custom commands to be send? Motorola-S seems ...

Hi all,

While I"m pretty far away from implementing this (working on the hardware), I'm considering using motorola-s as my 'standard' for encoding. Yes, it's larger but it does have some nice properties. The one thing I couldn't find anywhere is how error-control is done. I know every string has a ...

I came across MCL65 not too long ago.. Seems to be cycle accurate and fully microcoded using a 2Kx32bit ROM. Link here:

http://www.microcorelabs.com/mcl65.html

While it *claims* to come in at around 250 LUTs on a Spartan 7, compiling it for a Cyclone II yields an unfortunate 670LE beast. Still ...

Thanks all! I'll keep you posted on any updates...

One thing I did for my xbox vdp was using a lookup-table. At 28.63636mhz, which is 8 times the NTSC frequency, i pre-calculated the phases for all 512 color combinations * 8 states of the phase. Perhaps a bit overkill but it worked :-)
You can get away with a lot less depending on the number of ...

Thanks Garth!

I've used TASM in the interim in DosBox but it's not great because of that. Also, I want to add native support for bank switching and what not.. I'll check out cross32 but it looks like I might need to write my own down the line..

Cheers!

Yvo