Search found 5 matches

by gregc
Tue Sep 25, 2018 5:11 pm
Forum: Spectrum BASIC
Topic: Spectrum Basic Variables
Replies: 3
Views: 16332

Re: Spectrum Basic Variables

That is quite common to BASIC interpreters. Variables are saved on different stacks and any checking is on that stack so you can sometimes have A (float), A% (integer), A(..) (array) and A$ (string). Yes, confusing, but it is best practice to use longer variable names anyway if possible (not always ...
by gregc
Thu Aug 09, 2018 9:44 pm
Forum: Hardware
Topic: Mostly working ZX80
Replies: 5
Views: 2808

Re: Mostly working ZX80

Hi Mark, thanks for that. Have had a quick look and the RF modulator is standard. I shall have another look on the scope and on the TV tomorrow to see what I can find. I might still purchase the ZX8-CCB anyway as it will show a much sharper screen but leave the modulator as original.

Greg
by gregc
Thu Aug 09, 2018 4:34 pm
Forum: Hardware
Topic: Mostly working ZX80
Replies: 5
Views: 2808

Re: Mostly working ZX80

Hi Rich,

Both items are really clever. Have to say I prefer the latter (ZX8-CCB) as it leaves the RF modulator as sold. Might be a good option even if I get the RF working.

Greg
by gregc
Thu Aug 09, 2018 4:22 pm
Forum: Hardware
Topic: Mostly working ZX80
Replies: 5
Views: 2808

Re: Mostly working ZX80

Hi, I purchased a Philips 7300 TV Tuner a while ago which has sorted these issues. It has proper analogue tuners (rotating dials!) and then outputs to a modern TV via a composite signal. It has 12 channels which is enough for all my computers. It is only the ZX80 that fails. It must be transmitting ...
by gregc
Thu Aug 09, 2018 1:23 pm
Forum: Hardware
Topic: Mostly working ZX80
Replies: 5
Views: 2808

Mostly working ZX80

Hi, I am new to this forum and hope someone can help. I used to have a large computer collection but it has to be reduced and it is now the early Sinclairs and the Sharp MZ stuff. I have a ZX80 and ZX81 as well as a ZX80.5 - in other words an 80 upgraded to 81 ROM and keyboard overlay. All my comput...