The 1-Bit Forum — ZX Touch console

Re: ZX Touch console

null@example.com (AtariTufty) — Wed, 21 Feb 2024 21:58:00 +0000

Haha hipster middle aged nostalgia nerds more like
I thought you'd say something about a low-pass

I'm just happy the gadget seems to play our beeper stuff OK now

Re: ZX Touch console

null@example.com (utz) — Wed, 21 Feb 2024 12:44:57 +0000

Pah, kids and their hipster gadgets nowadays

There are plenty of z80 instructions which are neither 4 cycles nor a multiple thereof, so that statement is kind of bollocks. Sampling every 4 cycles should still be good enough though, since most beeper engines align output to 8 cycles. To do things properly however one should sample at every clock cylce, and then apply a low-pass at half the sample rate of the emulated output.

ZX Touch console

null@example.com (AtariTufty) — Tue, 20 Feb 2024 23:14:26 +0000

The fw has now been updated on the new speccy handheld, the ZX Touch. The release notes say it now enables beeper scanning every 4 clock cycles aligning with the execution time of a single z80 instruction. The carrier frequency now exceeding the human audible range on pwm engines again.

Ofcourse I tested a Pytha tune first as I find these the hardest to play correctly (still can’t get Spectronica to play properly on my next with frequency drops in places).

Here’s the ZX Touch in action
https://youtu.be/dYW8df6W56s?si=QXQHXu9c5lCcbAnJ