Search found 144 matches

by varmfskii
Sun Jan 13, 2019 3:50 pm
Forum: News
Topic: Port system documentation updated
Replies: 33
Views: 2590

Re: Port system documentation updated

I see the general superiority of your (eastern, soviet, exUSSR, etc.) decoding scheme, but you seem simply incapable of understanding how it breaks compatibility. I do not know if this is a failure in communication, you being too stubborn to actually have an open enough mind to perceive the problem,...
by varmfskii
Fri Jan 11, 2019 3:15 pm
Forum: News
Topic: Port system documentation updated
Replies: 33
Views: 2590

Re: Port system documentation updated

So,if I attempt to write to a pre-existing 8-bit port that has a specified value for A16 using both out (nn),a and out (c),a I will succeed in writing to that port? If that is not the case, then it can cause incompatibilities. Very few of the 8-bit port addresses on the next are not pre-existing. It...
by varmfskii
Mon Jan 07, 2019 7:22 pm
Forum: News
Topic: Port system documentation updated
Replies: 33
Views: 2590

Re: Port system documentation updated

It breaks compatibility with some preexisting hardware which is being referenced in the zx spectrum next. How can you not see this. Look at the port decoding table that you have given and think a bit. The Soviet way is not the only way. For Example: Look at port 0xff. Since this is a preexisting 8-b...
by varmfskii
Sat Jan 05, 2019 4:00 pm
Forum: ZX Spectrum Next
Topic: Games & SD Card
Replies: 11
Views: 632

Re: Games & SD Card

Software Amusements has been distributing games on bootable SD cards. https://www.softwareamusements.com/SpectrumNextGames/index.html Reading the licensing restrictions, I can't see how they are in violation. They are selling the games, and giving away the necessary portion of the tbblue distributio...
by varmfskii
Sun Dec 30, 2018 8:36 pm
Forum: News
Topic: Port system documentation updated
Replies: 33
Views: 2590

Re: Port system documentation updated

It makes no sense to discuss other exUSSR computer architectures until all the errors in the ZX Next architecture are fixed. It seems that you and AA are talking at crossed purposes. The A16 from in a,(nn)/out (nn),a in exUSSR computers is an interesting hack and I'm sure that it has proved to be a...
by varmfskii
Mon Dec 24, 2018 4:46 pm
Forum: News
Topic: Port system documentation updated
Replies: 33
Views: 2590

Re: Port system documentation updated

How does the hardware manage this feat? If I were to build a machine with a Z80 myself, what would I have to do to create this signal from the available signals? Not when is the signal asserted, how is the signal asserted?
by varmfskii
Mon Dec 24, 2018 3:08 am
Forum: News
Topic: Port system documentation updated
Replies: 33
Views: 2590

Re: Port system documentation updated

While not in issue with an FPGA version of a Z80, with an actual Z80 how does the hardware determine whether to assert A16 or not?
by varmfskii
Thu Oct 11, 2018 4:07 pm
Forum: ZX Spectrum Next
Topic: Wireless keyboard?
Replies: 10
Views: 2131

Re: Wireless keyboard?

That particular adapter is for combination PS/2 USB keyboards that use a USB connector (it is a passive adapter). While USB->PS/2 adapters do exist, they are rather hard to come by.
by varmfskii
Sat Sep 22, 2018 2:27 am
Forum: ZX Spectrum Next
Topic: Pi accelerator I2C
Replies: 5
Views: 898

Re: Pi accelerator I2C

I am listening on the pi side thus the reference to pig2i2c, but it doesn't seem to matter.
by varmfskii
Thu Sep 20, 2018 2:53 pm
Forum: ZX Spectrum Next
Topic: Pi accelerator I2C
Replies: 5
Views: 898

Re: Pi accelerator I2C

the only "demos" I could find were the pi2c dot command (on the zx next side) and the pig2i2c (on the pi side) and no matter what I do on the pi side any pi2c command results in "No ACK on address select. Probably no PI at 0x42"