Following Ben Eater's recommendation, I bought a couple of
these BB830 Solderless BreadBoard from Amazon

https://www.amazon.ca/dp/B0040Z4QN8?psc=1&ref=ppx_yo2ov_dt_b_product_details

The package contain a separate piece of metal, the same size as the board.

What is that piece for ?

"External ...

Interesting that only 3-input-NOR gates were used to build the cpu.

The most efficient way ?

** NOR gates **

I've been "binging" on this Apollo stuff for the last few days.

That "34c3" video, is probably the best "cpu-computer-os" video I've ever seen. Great graphics and very "meaty" ("rapid fire" for sure ! (Heh, youtube slowdown 75% helps :) )

Covers everything from the hardware construction / design ...

Tony,

Nice job with the game !

I tried it with Winvice (sadly .. no real C64 here .... yet ).

Heh, wondering if my logitech wheel / pedals will work with Winvice ? ... will have to try that.

I wonder how difficult it would be to add a lap timer ?

I'm thinking maybe a combination of sprite ...

Lol, right after my previous post in this thread.

Senility / laziness is a terrible thing

Thanks.

Mike

Drass,

Did you post the logisim file(s) somewhere in this huge thread ?

If not, could you do so ?

I'm curious how your circuit compares to Warren's Microcoded CPU https://minnie.tuhs.org//Programs/UcodeCPU/index.html

Drass,

I would love to see your Logisim file.

One of the few examples of a microcoded CPU, and also in Logisim that I've found is this :

http://minnie.tuhs.org/Programs/UcodeCPU/index.html

I'm particularly interested in seeing your microcode hardware / strategy.

Mike

Indeed, JS engines are really impressive these days (and of course are running on fast CPUs themselves.)

I didn't mean a mix of hardware and software, just that to drive a SID you need to run a 6502 program, so this emulator, like all SID players I suppose, has to emulate the 6502. Including a ...

If you mean an emulated CPU driving a real SID, I don't know if many people are doing that, but I guess it's possible (FPGA ?)

The above project is all software, no hw involved :)

It's amazing with our blazing CPU's that (formerly considered) "slow" Javascript and Web Browsers can do this kind of ...

Some interesting comments in the source code :

//And now, the combined waveforms. The resid source simply uses 4kbyte 8bit
// samples from wavetable arrays, says these waveforms are mystic due to the
// analog behaviour.

//It's true, the analog things inside SID play a significant role in how ...

Mihály Horváth (Hermit), has recently (last month) released his JsSID emulation :

It will play *most* SID's but not the "real special / tricky ones ".

He's doing some interesting things in the code, to make a "~1 M / cycle" SID work while using a fraction of that cycle count.

Listen to it here ...

Well my first attempt to get some output (an 80 x 10 pixel bar at line 10) has failed so far.

I haven't bothered with any HDL yet, just trying to calculate and manually create an input text file ;)

So I just grabbed the source, as I'm not sure if it's my calcs or the program / input file that are ...

Interesting, a couple of VGA simulators, both read an input file with the VGA signals, then render
the output.

Both using simple text files

One is windows based : (but source is there to compile for linux)

http://vgasim.sourceforge.net/index.php?option=com_content&view=article&id=46:welvgasim ...

Ya, about 80 seems to be the delay

5 poke 53281,0
6 for x=0to80 :next
7 rem *******
10 sys2212

Sounds logical.

If I change the code to :
LDA #$7F
STA $DC00

it works.

Eliminates the RETURN column.

But ... this could lead to a discussion of how the CIA ports work ;)

Assuming the Vice emulation is reasonably accurate.

What happens to the CIA when the $DC00 port is changed, as far as ...