[Coco] CoCo Emulators

Steve Ostrom smostrom7 at comcast.net
Sun Mar 21 20:22:01 EDT 2021


Thanks for confirming my suspicions about INT. The newer CoCo 3 manual does state it correctly and the older Getting Started manual does not.

I am having a problem with the PUT function in the VCC emulator.  It’s not working like I assume it would, or I’m making a huge blunder.  Here is a simple code to illustrate.

100 PCLEAR4
110 DIM W(16,16)
120 PMODE 4,1
130 PCLS
140 SCREEN 1,0
150 FOR X=0 TO 16
160 FOR Y=0 TO 16
170 PSET(X,Y)
180 NEXT Y
190 NEXT X
200 GET(0,0)-(16,16),W
210 PUT(30,0)-(46,16),W
220 PSET(30,0)
230 PRESET(30,0)
240 GOTO 220
250 END

This code should create a 17x17 pixel solid square in the upper left corner of the screen starting at (0,0).  Then it should copy and paste that square 30 pixels to the right, starting at (30,0).  Then the PSET and PRESET loop should blink that pixel at (30,0).  When I run this program, the blinking pixel is not the upper left corner of the pasted square.  So PUT is not pasting the square at where I expect it to.  I’d appreciate it if someone could show me where I’m not understanding the GET and PUT functions.

Thanks!  (I told you I’d probably have more questions about the emulator !!  😊)

--- Steve ---


Sent from Mail for Windows 10

From: Arthur Flexser
Sent: Sunday, March 21, 2021 6:23 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] CoCo Emulators

The greatest integer in -2.3 is -3, since -2.3 is smaller than -2.  The INT
function is defined as the greatest integer in a number.

Art




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