The 6502 was officially launched at the Wescon Trade Fair, San Francisco, September 16th 1975.

Within a few days of the launch the EDN technical department had lashed together a prototype on a breadboard and reviewed the new device. That first article is here:

https://web.archive.org/web ...

Well Done Marcel,

Speaking of nice numbers - there is always 355/113

Have a great weekend at VCF Berlin


Ken

Hi All,

Marcel has shared his draft v4 ROM with me, so I can now run WozMon and the 6502 Disassembler on the Gigatron which is emulating a 6502 at about 1/8th of 1MHz speed.

It's 35 years since I did any 6502 assembly language - at that time on a Rockwell AIM-65 at Bangor University.

I guess I ...

Hi Mike. B

Having discovered the 6502 via Mike Chambers C-code emulation which runs on many cpus including a 400MHz ARM - it would be great to try out VTL02.

Is there a ROM listing of VTL02 which could be patched into Mike Chambers' cpu.c code?

Please forgive me if this is already well trodden ...

Thanks Mike,

I came across your BCD patch - when looking into the original thread on Mike Chambers' code.

Much Appreciated

Ken

Hi KM,

AFAIK - Mike Chambers emulator is for 6502.

Thanks for running the "million empty loops" test - that's gives another good data point to compare what this un-optimised C emulator can achieve.

I will have a go at Sieve and Mandelbrot later.

Ed - thanks for pointing me to to the emulatior ...

Hi KM,

Thank you for supplying some timings from real 65C02 processors - most interesting.

As you say, much of the execution time is dominated by the actual time to print character output - something that I could minimise by running at 921,600 baud.

The other metric I tried was 1,000,000 empty ...

Well Done Marcel,

Microchess in under 1000 bytes of code - executed by under 1000 TTL logic gates.


regards


Ken

Hi All,

As a teenager, I didn't get much exposure to the 6502 (my machines were generally Z80) - but I did a bit of 6502 assembly language programming on an AIM-65 whilst at college.

Some years ago, I came across the KimUno - which was a 6502 emulated by an Atmel ATMega328 - running under the ...