6502.org

This poll is now closed. The poll was ended at 3:40 AM, GMT on August 21, 2005.

I'd like to take a little poll: what kind of 6502 do you use?

• MOS Technologies/Commodore/GMT Microelectronics 6502 (the original)
• Rockwell 6502 (R6502, built-in clock generator)
• Rockwell 6512 (R6512, functionally equiv except for no builtin clock gen)
• California Micro Devices/GTE G65SC02
• Rockwell 65C02 (R65C02, CMOS R6502)
• MOS Technologies/Commodore/GMT Microelectronics 65CE02 (enhanced)
• Synertek SY6502
• WDC W6502S (65C02)
• WDC W65C816S (65C816, not really a 65xx but most people regard it as close enough)

On August 21 (1 month after this starts) I'll collect the results.

I use the Rockwell R6502. It was the only one I could get.

I use the Ricoh RP2A03 in the NES console. It's same as NMOS 6502, but without a decimal mode and with sound and DMA integrated.

Maybe that's cheating because I use the whole console too, but pretty much all of the useful signals (60+) are already brought to the cartridge connector.

I'll tally that as MOS 6502.

My workbench computer has a WDC 65c802 in it now, which is an '816 that is pin-out compatible with the '02. You don't get the 16MB address space, but still get most of the instruction benefits. I developed the '816 Forth with it, but still run mostly 65c02 software on it. I have several WDC 65c02's and 65816's in PLCC for future projects.

I'm building a SBC based on a R6541AQ (a 6501 based microcontroller). I have an R6502 processor ready for a future project and I've been working on a 65816 design in VHDL for my XESS FPGA board.

I use WDC's 65C265 MicroController. Along with its 816 core, it has
a number of handy features such as an internal ROM monitor that
allows upload/download of 'S' record code plus alteration of registers
and memory via a serial tether.
The 265 also comes with built-in address decoding, vectored Int's plus
4 built-in Serial ports.

Don't let the 84pin PLCC scare you off. I have wire-wrapped a couple
of them, and they are very forgiving.

- Wally

I use the 65816 my Kestrel designs.

Reading what other wrote down, it seems I can write down quite a list myself:

65SC02, used mainly as debugging device for faulty 6502 computers as the 65SC02 also stops during writing when activating RDY
MOS6502, used in Commodore VIC-20, PET and CBM series
6504, used in the smaller Commodore IEEE drives and MPS802 printer
6509, used in the 600 and 700 series
6510, used in the C64
7501/8501, used in the C16, C116, Plus/4
8502, used in the C128
65sc816, used VIC20-PC and Elektor Junior

The 6504 was / is a great size for doing small projects. The 1st SBC I
made used an 04. Its too bad that one can't buy these derivatives like the
04 & 07 in CMOS !

-W


P.S. Has anyone else used the 04 in a project recently ?

6510

I use R6502 (from salvaged from Cable Data terminals) and MOS6502 (salvaged from Vic-20s and C1541/C2031 drives).

Not a homebrew "use" as such, but I'll mention here the SY6502A (NMOS) in my late-model BBC Micro which still sees regular use for code development. There's not much to say about it except the undocumented opcodes on this particular CPU are fairly unstable.

Hi Brian,

Who was the manufacturer of the Cable Data Terms, and what was the
model # ?
I would love to find one. Can you provide any system details about the
unit such as as onboard RAM/ROM, IO etc ? Date of Manufacture ?

Stay Cool in Sunny Ontario ! from not quite as hot Nova Scotia !

Wally

CableData was a firm which provided billing (hardware & software) solutions to CATV industry. I don't know who the OEM manufacture of the units was and can't recall model numbers. They were manufactured in mid to late 1980's are were being removed from service in early 1990s. I had a bunch of them but could not find any info for them, not even from IT guys at CATV company that was discarding them . They were taking up alot of space, were heavy / bulky, and I was moving. So about 6 years ago I gave a few of them away and scrapped the rest for parts.

As I recall, RAM consisted of a few 6116. I think terminal supported about 4 pages of 80x25 text display. So, likely there was 8K of video memory. Since unit was just a dumb terminal, probably system ROM was 2K.

I may have one system board that I didn't disassemble. However, I just finished moving again and it will likely take me 6 months to get organizad again.