Search found 1512 matches

by Paul
Wed Mar 27, 2024 4:26 pm
Forum: Hardware
Topic: SD extension on ZXpand+
Replies: 12
Views: 197

Re: SD extension on ZXpand+

msknight wrote: Wed Mar 27, 2024 3:42 pm Stuff it. I couldn't resist. No, removing the resistor didn't solve it.
What was the value of the resistor (measured)
by Paul
Wed Mar 27, 2024 4:23 pm
Forum: Hardware
Topic: SD extension on ZXpand+
Replies: 12
Views: 197

Re: SD extension on ZXpand+

No, please test capacitance without card installed and without inserted in zxpand My multimeter measures it (own setting) My guess would be that wire capacitance of the short lead disturbes the signal line OR That an additional 10-100uF capacitor between 3.3V and ground will help against too thin wi...
by Paul
Wed Mar 27, 2024 2:15 pm
Forum: Hardware
Topic: SD extension on ZXpand+
Replies: 12
Views: 197

Re: SD extension on ZXpand+

Have you measured and compared the capacitances of the lines agains Ground? Especially the one of the 3.3V?
by Paul
Wed Mar 27, 2024 12:59 pm
Forum: Welcome Area
Topic: Hiya from voorsk
Replies: 3
Views: 104

Re: Hiya from voorsk

Welcome to our forums.
Enjoy, read and ask questions, were trying to help ;)
by Paul
Tue Mar 19, 2024 4:59 pm
Forum: ZX BASIC
Topic: Strange integer behaviour
Replies: 11
Views: 545

Re: Strange integer behaviour

1024MAK wrote: Tue Mar 19, 2024 4:28 pm The internal ROM function that converts a floating point number to a string is almost certainly the same routine that converts it for printing to the screen.

Mark
You can delete the "almost"
by Paul
Sat Mar 16, 2024 10:16 pm
Forum: Development
Topic: JOY81 - Programmable Joystick Interface for ZX81
Replies: 102
Views: 61551

Re: JOY81 - Programmable Joystick Interface for ZX81

I just ordered 20 for europe.
If no one is offering for UK I'm willing to send there too. No sending to rest of the world.
Prices when I received them.
by Paul
Fri Mar 15, 2024 10:12 am
Forum: Hardware
Topic: Atari joystick without ZXpand+
Replies: 33
Views: 1065

Re: Atari joystick without ZXpand+

Of that I'm not Shure.
But if mazogs didn't work without altering then it doesn't look into the systemvariable LASTK (which inkey does) but either uses the ROM call or own routines.
by Paul
Fri Mar 15, 2024 9:11 am
Forum: Hardware
Topic: Atari joystick without ZXpand+
Replies: 33
Views: 1065

Re: Atari joystick without ZXpand+

Inkey can only use single keys. But the ROM reads the keyboard by eight IN commands. Each can have five keys detected which makes the 40 keys. Games can do the same. But even with inkey you can use more directions. If the game takes T for up and V for down, F for left and G for right then R might be...
by Paul
Fri Mar 15, 2024 8:19 am
Forum: Hardware
Topic: Atari joystick without ZXpand+
Replies: 33
Views: 1065

Re: Atari joystick without ZXpand+

Joy81 is no miracle and we can make new boards if you're interested (or others as well)
It also offers multiple key presses and diagonal keys not only up and down.
by Paul
Fri Mar 15, 2024 8:18 am
Forum: Hardware
Topic: Atari joystick without ZXpand+
Replies: 33
Views: 1065

Re: Atari joystick without ZXpand+

As long as games use the inkey equivalent they don't need to be rewritten. That's what zxpand offers to the zeddy or otherwise it's own API.
Joy81 on the other hand implemented the exact keyboard behaviour and so games need not be rewritten.