Search found 18 matches

by vwbz80a
Mon Jan 15, 2018 6:18 pm
Forum: ZX BASIC
Topic: PEEK & POKE math (?? +256 ??)
Replies: 2
Views: 84

Re: PEEK & POKE math (?? +256 ??)

We are not adding 256 to the low byte... when we do something like PRINT PEEK 16388 + 256 * PEEK 16389 To display the current value of ramtop you have to remeber the order of processing. the computer will do both PEEKS then it will multiple the second PEEK [highbyte] value by 256 and finally add on...
by vwbz80a
Mon Jan 15, 2018 3:20 pm
Forum: ZX BASIC
Topic: PEEK & POKE math (?? +256 ??)
Replies: 2
Views: 84

PEEK & POKE math (?? +256 ??)

This must be really Obvious!!!!! But it is NOT computing between the ears. (or on paper). :oops: Problem: why do you add 256 to the low byte decimal before multiplying by the high order decimal? :roll: :roll: using a hex calculator there is no need for any additon . and it is not that i can't get th...
by vwbz80a
Sun Jan 14, 2018 11:23 pm
Forum: Development
Topic: old magazine article -- interesting ! ??
Replies: 14
Views: 323

Re: old magazine article -- interesting ! ??

Count me in! :D And, can you post one more article (ComputerDigest, Feb. 1985) here? DesSony sorry but I am unable to track it down.. :cry: :cry: however i found this ICYMI, https://archive.org/details/computermagazines?sort=&and[]=date%3A2%2F25%2F1985&and[]=languageSorter%3A%22English%22&and[]=med...
by vwbz80a
Sun Jan 14, 2018 11:10 pm
Forum: Development
Topic: old magazine article -- interesting ! ??
Replies: 14
Views: 323

Re: old magazine article -- interesting ! ??

Count me in! :D And, can you post one more article (ComputerDigest, Feb. 1985) here? DesSony sorry but I am unable to track it down.. :cry: :cry: however i found this ICYMI, https://archive.org/details/computermagazines?sort=&and[]=date%3A2%2F25%2F1985&and[]=languageSorter%3A%22English%22&and[]=med...
by vwbz80a
Tue Dec 19, 2017 12:46 am
Forum: Hardware
Topic: TI99/4A KEYBOARD ADAPTATION
Replies: 10
Views: 372

Re: TI99/4A KEYBOARD ADAPTATION

Excellent.
by vwbz80a
Tue Dec 19, 2017 12:42 am
Forum: Welcome Area
Topic: Have a Holly Jolly Merry ZXmas!
Replies: 7
Views: 199

Re: Have a Holly Jolly Merry ZXmas!

Merry Christmas ****\.....) ,, ,, ,, ,,
by vwbz80a
Sun Dec 17, 2017 12:11 am
Forum: Hardware
Topic: Slower than Slow. I mean 25 hertz slow;-)
Replies: 6
Views: 252

Re: Slower than Slow. I mean 25 hertz slow;-)

Gammaray,
Thanks for the info also.

The link Is interesting! But probably over my head. :D
The idea of using bit mapped out put , is a possible path to a solution.. thought.
And along that line....... I do have a z80 PIO chip that could be put on the back buss connecter. Thinking that over.
by vwbz80a
Sun Dec 17, 2017 12:00 am
Forum: Hardware
Topic: Slower than Slow. I mean 25 hertz slow;-)
Replies: 6
Views: 252

Re: Slower than Slow. I mean 25 hertz slow;-)

Siggi,
Thanks for the info on the video timing. Very helpful information!
:)
by vwbz80a
Mon Dec 11, 2017 3:14 pm
Forum: Hardware
Topic: Slower than Slow. I mean 25 hertz slow;-)
Replies: 6
Views: 252

Re: Slower than Slow. I mean 25 hertz slow;-)

Mark, Thanks. I did suspect slowdown could affect the display, as that is what "slow" does. The ula interaction with the clock ... I did not know of . :o But someone did say the ula runs the video framing. SO if that is going on, it must be "using the clock" to keep it all in sync. :roll: My Issue 3...