Re: Clearing half a screen fast

2021-02-26T14:04:15-05:00

Oh wow. and here I rolled out my own ASM routine. This forum doesn't want to email me when I get new posts.

Statistics: Posted by mikefromca — Fri Feb 26, 2021 2:04 pm

Re: Clearing half a screen fast

2021-02-09T19:20:46-05:00

Code:

VIEW PRINT 1 TO 15CLS

Statistics: Posted by angros47 — Tue Feb 09, 2021 7:20 pm

Clearing half a screen fast

2021-02-09T12:10:02-05:00

The way I cleared about half a screen in the past with QuickBasic for DOS is with these commands:

Code:

for n% = 1 to 15locate n%,1print space$(80)next n%

Now when I look at the output with DOSBOX running at 6000 clock cycles, the execution is slowish where I really notice the flicker when the screen clears.

I might have to roll out a fast assembly routine, unless someone knows how to clear half a screen much faster.

The reason why I need to do this is because I am making a live data logger and I need to see the data at a certain section of the screen, and without clearing part of the screen, I'll see incorrect (old data) as the amount of fresh data varies every time.

Statistics: Posted by mikefromca — Tue Feb 09, 2021 12:10 pm

Pete's QBASIC Site

Re: Clearing half a screen fast

Re: Clearing half a screen fast

Clearing half a screen fast