Search found 133 matches
- Mon May 12, 2014 11:42 am
- Forum: Hardware
- Topic: looking for someone in London to help me troubleshoot a ZX81
- Replies: 22
- Views: 6544
Re: looking for someone in London to help me troubleshoot a
Well, soon find out. I have other possible uses for it too, and it was dead cheap.
- Mon May 12, 2014 10:58 am
- Forum: ZX BASIC
- Topic: BASIC speed
- Replies: 8
- Views: 4032
Re: BASIC speed
I should add, obviously the value of FRAMES will eventually wrap around, which might give you a weird negative result if your program starts just before it wraps, and ends just after. You can either just run it again if you get that, or you could do a POKE 16437,255 at the start to make sure it's no...
- Mon May 12, 2014 10:45 am
- Forum: ZX BASIC
- Topic: BASIC speed
- Replies: 8
- Views: 4032
Re: BASIC speed
You can do almost the same thing, there's a system variable called FRAMES. The ZX81 manual is online, and I think there's even a timing example in there. EDIT: Okay, didn't see a timing example, but FRAMES is at 16436 and 16437. So you can say LET FRAMES=PEEK 16436+256*PEEK 16437. According to the m...
- Mon May 12, 2014 8:30 am
- Forum: ZX BASIC
- Topic: BASIC speed
- Replies: 8
- Views: 4032
Re: BASIC speed
Why don't you write a program to find out?
- Mon May 12, 2014 1:18 am
- Forum: Hardware
- Topic: looking for someone in London to help me troubleshoot a ZX81
- Replies: 22
- Views: 6544
Re: looking for someone in London to help me troubleshoot a
Thanks gozzo - luckily it's my ZX80core I have it in mind for, and it has the CCB on board.
- Mon May 12, 2014 1:13 am
- Forum: ZX BASIC
- Topic: Another 1K wonder lol
- Replies: 2
- Views: 2310
Another 1K wonder lol
In the tradition of Shaun_B's 1K wonders, may I humbly offer the following!
- Mon May 12, 2014 12:30 am
- Forum: Hardware
- Topic: looking for someone in London to help me troubleshoot a ZX81
- Replies: 22
- Views: 6544
Re: looking for someone in London to help me troubleshoot a
Haha thanks. That EasyCap looks good. I've just ordered one - at that price I'm sure I'll find it useful for something!
- Mon May 12, 2014 12:27 am
- Forum: ZX BASIC
- Topic: Bouncing ball
- Replies: 14
- Views: 11235
Re: Bouncing ball
Oh, and SGN PI gives you 1 in 2 bytes also.
- Mon May 12, 2014 12:26 am
- Forum: ZX BASIC
- Topic: Bouncing ball
- Replies: 14
- Views: 11235
Re: Bouncing ball
Well your avoidance of GOTO has simply made it use more bytes really, as well as subverting the usual meaning of FOR. But anyway - one thing I remember from my 1K days is that NOT PI gives you zero in two bytes, whereas PI-PI takes 3 bytes.
- Sun May 11, 2014 8:58 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 260
- Views: 115749
Re: ZX80 Core - new ZX80 motherboards
Starting to make some progress!