Sinclair ZX80 / ZX81 / Z88 Forums

RS232 communication is not as simple as you might think. RS232 requires a steady baudrate. This is easy on the PC side where you have a chipset with hardware handshake and interrupts. Hardware handshakes are not available on the ZX81, so we have to use software handshake (XON/XOFF). And the interru...

HAPPY HOLIDAYS!! Bloody colonials.

All the best to you and yours Charles in the lone star state and all the best also to zeddy lovers everywhere.


Best wishes.


Moggy.

Mathematical functions simple and complex can be defined within a string in zx81 basic and the evaluation of said function, after whatever values needed are entered, can be called by simply asking the strings value. That would require a GOSUB or GOTO. Regards, Shaun. Not sure what you're driving at...

Mathematical functions simple and complex can be defined within a string in zx81 basic and the evaluation of said function, after whatever values needed are entered, can be called by simply asking the strings value.

Andy Rea wrote: ↑Sun Dec 09, 2018 9:41 am Brilliant stuff indeed, Shame the humble zeddy doesn't have sprites... Imagine some awesome scrolling action games...

Thanks for sharing this with us.

Andy

That's because you haven't invented them yet Proff' !

Superb work as always,Adam,many thanks for this.

I won't be expanding it. As a 2K Adventure game it was a development novelty only--a fun exercise in coding. A full-RAM version with more rooms and features would require a redesign of some of the compromises to make to fit into 2K, and Adventure games abound in the wilds. (I think the one I posted...

Well done Siggi, This modification I like very much!

It boots in slow mode.

As Martin says the blinking should only be apparent when switched into fast mode.

I remember a colour interface back then though sadly not the name. I do remember though it was housed in a white case identical to the rampack used by Stonechip electronics for their Panda range of rampacks. It may be the one mentioned in this advertisement. https://www.sinclairuser.com/021/hardwre....