Search found 50 matches

by Black_Cat
Sat Apr 06, 2019 12:42 pm
Forum: ZX Spectrum Next
Topic: Compatibility problem with TurboSound FM (register expansion of TurboSound Next interferes)
Replies: 10
Views: 1107

Re: Compatibility problem with TurboSound FM (register expansion of TurboSound Next interferes)

It makes no sense to worry about the theoretically possible clock frequency, because all musical compositions of ZX Spectrum are designed for the processor at a frequency of 3.5 MHz. It matters very much if the clock is being used to time things as the original poster was suggesting when he asked i...
by Black_Cat
Thu Apr 04, 2019 8:11 pm
Forum: ZX Spectrum Next
Topic: Compatibility problem with TurboSound FM (register expansion of TurboSound Next interferes)
Replies: 10
Views: 1107

Re: Compatibility problem with TurboSound FM (register expansion of TurboSound Next interferes)

I designed the board, assuming that the expansion port was driven at "14MHz" like "ZXBus". I selected a 74AC class logic IC. There were fewer varieties to choose from, so the number of ICs increased to six. The original "TurboSound" used the 74ALS class "KP1533" series. You can use any series of ch...
by Black_Cat
Thu Apr 04, 2019 7:12 pm
Forum: ZX Spectrum Next
Topic: Compatibility problem with TurboSound FM (register expansion of TurboSound Next interferes)
Replies: 10
Views: 1107

Re: Compatibility problem with TurboSound FM (register expansion of TurboSound Next interferes)

2. TS-FM Problem: Last September I received a reply about the implementation of FM Sound. However, the announcement of "rejected for copyright reasons" is not found except this reply. I started designing my own Sound card. I noticed that the sound chip can be decoded with a single 13-NAND logic IC ...
by Black_Cat
Wed Jan 23, 2019 4:45 pm
Forum: ZX Spectrum Next
Topic: Musical potential of the NEXT.
Replies: 64
Views: 13670

Re: Musical potential of the NEXT.

The exUSSR community has extensive experience in the development of sound systems for the ZX Spectrum. TurboSound and TurboSound FM systems are our developments. Experience in the development of these sound systems has shown that it makes no sense for ZX Spectrum to create an iron system that does n...
by Black_Cat
Wed Jan 23, 2019 1:03 pm
Forum: ZX Spectrum Next
Topic: Musical potential of the NEXT.
Replies: 64
Views: 13670

Re: Musical potential of the NEXT.

There is a contradiction with the original concept of ZX Next. Using YM8930 instead of the third AY891x would probably make sense if it was originally planned. But in the ZX Next, the first two AY were originally positioned to play TurboSound music, while the third AY was positioned as an auxiliary ...
by Black_Cat
Sun Jan 20, 2019 9:21 pm
Forum: News
Topic: Port system documentation updated
Replies: 43
Views: 5532

Re: Port system documentation updated

No problem. You have the opportunity to offer a better way how to separate Kempston mouse and Kempston joystick. :)
by Black_Cat
Sun Jan 20, 2019 8:45 pm
Forum: News
Topic: Port system documentation updated
Replies: 43
Views: 5532

Re: Port system documentation updated

Say, I want the value in a register other than A, especially if I want to preserve A. Once the rules are written, and embodied in the hardware, these rules should be executed, otherwise the software will not work correctly. You can break existing rules if you don't care about your reputation. You h...
by Black_Cat
Sun Jan 20, 2019 8:28 pm
Forum: News
Topic: Port system documentation updated
Replies: 43
Views: 5532

Re: Port system documentation updated

Sometimes the plane crashes, but nonetheless, the aircraft continues its development. Civilization means development. The exUSSR community has 30 years of ZX Spectrum development, and we are not afraid of possible problems. The Western community is taking only the first steps in this direction. The ...
by Black_Cat
Sun Jan 20, 2019 6:44 pm
Forum: News
Topic: Port system documentation updated
Replies: 43
Views: 5532

Re: Port system documentation updated

The only misunderstanding is yours. A16 adds *new* rules. How much existing software is broken by these new rules. It is you who have the abrasive opinion that not following the rules for a separate branch of development is somehow broken. In cases where it is intended to use A16, the existing soft...