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+---- Thread: PRINT AT 22,0 (/showthread.php?tid=1025)
PRINT AT 22,0 - patters - 2021-01-27
Is it normal that the entire screen scrolls every time I print at line 22 - not even filling the line? Surely it should behave like the other lines, no? Or else it's not much of an improvement over Sinclair BASIC's PRINT #0; AT 1,0;
RE: PRINT AT 22,0 - boriel - 2021-01-28
(2021-01-27, 07:57 PM)patters Wrote: Is it normal that the entire screen scrolls every time I print at line 22 - not even filling the line? Surely it should behave like the other lines, no? Or else it's not much of an improvement over Sinclair BASIC's PRINT #0; AT 1,0;
No, it should now scroll up until you print at 23, 0 and fill the line or put no semicolon. i. e.
Code:
PRINT AT 22, 0; "22"
PRINT "at 23";
print " ... and More";
pause 0ZX Basic uses 0 to 23 coordinates.
To mimic Sinclair BASIC screen behaviour the scroll starts just before printing the next character that should go in "line 24".
In other words:
Code:
PRINT AT 23, 0; "Hello world" : REM no ; at the end, will scroll
PAUSE 0
REM screen will scroll up just before printing this
PRINT "This is now at line 23"You can disable scroll entirely if compiling with -D DISABLE_SCROLL
RE: PRINT AT 22,0 - patters - 2021-01-28
Thanks, I will have to try and isolate a test case. If not I'll just have to PM you with my entire source.