Search found 1289 matches

by XavSnap
Thu May 06, 2021 9:35 pm
Forum: ZX BASIC
Topic: [VB81] How to print a listing on a A4 picture.
Replies: 3
Views: 557

Re: [VB81] How to print a listing on a A4 picture.

You had to set your zx81 explorer to retrieve/allow external pictures…
:lol:

Or open this links...
http://zx81.vb81.free.fr/tutos/Listings.gif
http://zx81.vb81.free.fr/tutos/Listings2.gif

IE, Firefox: Ok.
Chrome, Edge: nOK!
by XavSnap
Wed May 05, 2021 4:00 pm
Forum: ZX BASIC
Topic: Can't make anything fit into 1K... or is it me?
Replies: 18
Views: 1428

Re: Can't make anything fit into 1K... or is it me?

:oops: It's true, this boolean graphics conditions are use block by block. IF X=Y THEN PRINT AT E,P+Q;"OOO";AT T,P+Q;"OOO" IF X=Y THEN PRINT (AT E,P+Q;"OOO");(AT T,P+Q;"OOO") …;AT E,P+Q;"OOO" AND X=Y ;AT T,P+Q;"OOO" AND X=Y ;... Somes conditions have been forgotten in the previous example !
by XavSnap
Tue May 04, 2021 4:47 am
Forum: ZX BASIC
Topic: [ASM] How to Print 32 characters...
Replies: 1
Views: 337

Re: [ASM] How to Print 32 characters...

Another way to preserve memory, is to set a variable … 10 LET P$="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" 20 PRINT P$,,P$ But, this code keep a value in the Vars buffer, and is needed if it's use more than 3 times ! And use more memory if the repeat character code if different… 10 LET P$="XXXXXXXXXXXXXXXX...
by XavSnap
Tue May 04, 2021 4:07 am
Forum: ZX BASIC
Topic: [ASM] How to Print 32 characters...
Replies: 1
Views: 337

[ASM] How to Print 32 characters...

Hi, A little routine to repeat a character code and preserve some memory room. Example: 10 PRINT "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" 20 PRINT 30 PRINT "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" Take more memory room than… 10 PRINT USR X;"X" 20 PRINT 30 PRINT USR X;"X" My code: .org 16514 LD HL,($4016) INC HL...
by XavSnap
Mon May 03, 2021 5:18 pm
Forum: Development
Topic: UDG - Just UDG...
Replies: 21
Views: 1369

Re: UDG - Just UDG...

Yes, on the Memotech HRG this is the "SKETCH" function…

http://zx81.ordi5.free.fr/memotech/MT06_HRG
by XavSnap
Mon May 03, 2021 4:52 pm
Forum: Development
Topic: UDG - Just UDG...
Replies: 21
Views: 1369

Re: UDG - Just UDG...

What about Old school graphics cards Quicksilva, AGB or Memotech… ?

examples:
Quicksilva CHRs:
https://forum.abandonware.org/download/file.php?id=578
https://forum.abandonware.org/download/file.php?id=521
by XavSnap
Sun May 02, 2021 6:33 pm
Forum: ZX BASIC
Topic: Can't make anything fit into 1K... or is it me?
Replies: 18
Views: 1428

Re: Can't make anything fit into 1K... or is it me?

IF X=Q THEN PRINT AT R,P+W;"O" IF X=W OR X=E THEN PRINT AT E,P+Q;"O";AT T,P+E;"O" IF X=E THEN PRINT AT R,P+W;"O" IF X=R OR X=T THEN PRINT AT E,P+Q;"O O";AT T,P+Q;"O O" IF X=T THEN PRINT AT R,P+W;"O" IF X=Y THEN PRINT AT E,P+Q;"OOO";AT T,P+Q;"OOO" equal PRINT AT R,P+W;"O" AND X=Q;AT E,P+Q;"O";AT T,P...