Sinclair ZX80 / ZX81 / Z88 Forums

Good ol' bit banging
Well, congratulations for the very good tuning ! Also the cute melody brings memories of those professional videogames for the Spectrum ..
Do you mind if I study the source and try to steal something for z88dk ?

Not bad, with such a fast clock you can get a relevant boost by making the visible area thinner.
Even the ARX mode slowness is not a problem anymore.. is it the real reason for your project ?

I had a Korg POLY-800.. no problems with it, and it patterns were sounds very close to the Spectrum's one..

Thank you for the hint.. I tried to help and bumped into the same problem !

(20 mhz.. cool, but as usually code runs only when the screen is not beig refreshed, right ?, it is probably equivalent to little more tha 4 mhz, if so).

The Standard ZX Spectrum's encoding was quite robust and I saw games being loaded from crap walkmans as well as from almost any type of audio set. The more important trick was to get a good recording. This could be achieved setting the recording volume correctly. The best recorders were the simple M...

:oops: <blush>.. you are right, it makes very little sense to open the zeddy to add a second audio plug ! I'm wondering.. how was the BASICODE "bascoder" implemented on the zx81 ? I know the Philips P2000 used an hardware mod to interface to the regular cassette players (rather than its embedded mic...

..the ROMCS magic: It is a nice add-on, no need to solder inside !

Good work, congratulations

As we all probably understood they were just design proposals close to the earlier brainstorming activities, in that stage where no real rules have still been established (base price, product requirements, etc..). Enrico Tedeschi was probably the first collector of Sinclair stuff ever, he authored t...

Perhaps it is an audio output.
Try connecting it to an amplifier.. if you hear the video raster noise then we're on the right guess, but you need to look for the proper software (z88dk supports this kind of sound).

It's a very nice idea, where are you storing the "video animated" elements ?