Search found 5102 matches

by 1024MAK
Fri Mar 08, 2024 2:49 pm
Forum: Hardware
Topic: RAM speed issue
Replies: 29
Views: 1111

Re: RAM speed issue

msknight wrote: Fri Mar 08, 2024 1:50 pm In case it matters for the price of fish, here's the clock as going in to the processor...
That is exactly I would expect.

Mark
by 1024MAK
Tue Mar 05, 2024 8:02 pm
Forum: Emulators
Topic: Eightyone emulator not recognizing cursor keys as joystick
Replies: 10
Views: 666

Re: Eightyone emulator not recognizing cursor keys as joystick

@Crayon21, in your original program, you are not actually using X to set the print position. You are using J and K. That's why the program appears to ignore the cursor keys. Mark I'll give this a go, thanks I can get left but it goes right when I hit the edge of the screen. is there a corrected rom...
by 1024MAK
Tue Mar 05, 2024 6:23 pm
Forum: Emulators
Topic: Eightyone emulator not recognizing cursor keys as joystick
Replies: 10
Views: 666

Re: Eightyone emulator not recognizing cursor keys as joystick

@Crayon21, in your original program, you are not actually using X to set the print position. You are using J and K. That's why the program appears to ignore the cursor keys.

Mark
by 1024MAK
Tue Mar 05, 2024 2:54 pm
Forum: ZX BASIC
Topic: Is it just my imagination or are X and Y flipped?
Replies: 5
Views: 512

Re: Is it just my imagination or are X and Y flipped?

I assume you are talking about the PRINT AT a,b ? In BASIC in general, only TAB is universally supported. Individual BASIC implementations hence use their own systems. It's just something you have to get used to. If it helps, it's the character position, hence not graphics related. With a character ...
by 1024MAK
Fri Mar 01, 2024 7:13 pm
Forum: Hardware
Topic: I've borked it
Replies: 123
Views: 5331

Re: I've borked it

"These aren't the droids you're looking for". If, and it's a big if, I can find a little time at the weekend, I want to try something which may or may not help. Far too tired now. Dogs woke me at 04:50 just before my alarm was due to go off, as I had to catch an early train to take me to London. Now...
by 1024MAK
Fri Mar 01, 2024 7:05 pm
Forum: Hardware
Topic: Zeddy displaying wrong characters on screen
Replies: 22
Views: 652

Re: Zeddy displaying wrong characters on screen

Don't forget, with 16K bytes of RAM, you get a fully expanded display file, and it can be in a different position in RAM.

Have you tried changing the ULA?

Mark
by 1024MAK
Thu Feb 29, 2024 9:23 pm
Forum: ZX BASIC
Topic: multi-statement in zx81 basic?
Replies: 5
Views: 384

Re: multi-statement in zx81 basic?

ZX81 BASIC only allows one command per line. IF being a "special" case, but you can only have one command after the THEN, the THEN being mandatory.

Of course, you can have another IF after the THEN. You can also have a complex expression as part of the IF.

Mark
by 1024MAK
Thu Feb 29, 2024 8:56 pm
Forum: Hardware
Topic: Which joystick for Spand?
Replies: 10
Views: 471

Re: Which joystick for Spand?

That ZXpand+ pin out is ONLY for the earlier boards with a ten pin header.

Mark
by 1024MAK
Thu Feb 29, 2024 8:11 pm
Forum: Hardware
Topic: Which joystick for Spand?
Replies: 10
Views: 471

Re: Which joystick for Spand?

Atari set the "standard" for joysticks that use switches and which use a 9 pin D connector. Commodore 64 and Amiga use the same. By Sinclair / Spectrum, that depends on if it's meaning for use with a joystick interface, which will be to the Atari "standard" or to Amstrad's bizarre rewired arrangemen...
by 1024MAK
Wed Feb 28, 2024 9:40 pm
Forum: Spectrum BASIC
Topic: Does the zx spectrum have a fill command?
Replies: 6
Views: 913

Re: Does the zx spectrum have a fill command?

Crayon21 wrote: Wed Feb 28, 2024 9:33 pm crap. are there basic extensions that have it?
I think so. But as I have not used any for many, many years, I'm not best placed to try to answer...

Mark