Prototype #2 is aliiiive!

codewar65 · Post by **codewar65** » Sat Jan 02, 2021 5:48 am

Progress!! Huzzah to 2021!

TomXP411 · Post by **TomXP411** » Sat Jan 02, 2021 9:55 pm

This is fantastic. The fact that the hardware is running software that was designed on the emulator, and never run on real hardware, is super exciting.

Fnord42 · Post by **Fnord42** » Sat Jan 02, 2021 10:20 pm

That's kind of the point of an emulator, though. ?

PS: It is, of course, still exciting and very cool.

Jeff Pare · Post by **Jeff Pare** » Sun Jan 03, 2021 9:26 pm

I'm subscribed to Adrian's channel partly because he's a superb troubleshooter - very glad he helped the project this way!

He also has the most 80s intro music, which is cool.

m00dawg · Post by **m00dawg** » Mon Jan 04, 2021 5:13 am

Another update from Kevin! I looked around and didn't see that it was posted yet, but sorry if it was and I missed it:

Perifractic · Post by **Perifractic** » Mon Jan 04, 2021 5:27 am

13 minutes ago, m00dawg said:

Another update from Kevin! I looked around and didn't see that it was posted yet, but sorry if it was and I missed it:

Was just coming here to post it but you beat me to it ?

m00dawg · Post by **m00dawg** » Mon Jan 04, 2021 5:33 am

Quite an update too! I don't want to spoil it but some juicy tidbits and answers to at least one question that I know several folks will be happy to find the answer to!

troj · Post by **troj** » Mon Jan 04, 2021 5:18 pm

Awesome to see some of the details, and it's not surprising things are evolving a bit as prototypes are built and tested.

What's an amazing testament to the planning the team has done is that the code changes required look to be relatively minor.

kktos · Post by **kktos** » Tue Jan 05, 2021 8:18 am

As a dev, I'm a tad displeased by the change for Bank Switching to ZP $00/$01.....

Not coherent with all the other system switches (mem location wise, I mean).

Taking 2 addresses on the tiny and already packed ZP.

Am I the only one ?

StinkerB06 · Post by **StinkerB06** » Tue Jan 05, 2021 10:05 am

1 hour ago, kktos said:

As a dev, I'm a tad displeased by the change for Bank Switching to ZP $00/$01.....

Not coherent with all the other system switches (mem location wise, I mean).

Taking 2 addresses on the tiny and already packed ZP.

Am I the only one ?

2 out of 256 bytes? Doesn't sound like very much to me! Those are the same addresses as the 6510's I/O direction and data registers, itself is used in the C64.

Oh, if I remember, ZP locations $02 to $7F are allowed to be used by the user, locations $80 to $FF are used by the kernel. $02 to $21 supposedly are designed to be sixteen virtual 16-bit registers (or 32 8-bit registers, since changing values in memory must be done on a byte-by-byte basis). You can see these defined within @SlithyMatt's assembly code.