Poke 53281 Poke 53285 Poke 53286

POKE 53287 through 53294

The eight sprite color locations correspond to the eight different sprites. For more information on programming with sprites, see the 64 Programmer's Reference Guide, "Programming Graphics" section.

Atari Peripheral Adequacy

I have an Atari 400 computer and an Atari 410 cassette recorder. I'm planning to buy an Atari 800XL computer, and I was wondering if the cassette recorder would work on the Atari 800XL computer.

Isaac Thornton Scott

As long as your recorder is still working fine with your 400, there should be no problem using it with an 800XL. You may want to have the tape heads cleaned and demagnetized, even realigned to give you a fresh start with your new computer. All 400/800 peripherals we know of will work just fine with the 600XL and 800XL computers.

Atari Graphics 2 Vs. 0

I have an Atari 1200XL. I have trouble seeing, so I prefer to use the largest size text mode, GRAPHICS 2. Is it possible to use this mode in place of GRAPHICS 0 for entering, editing, and running programs?

Wanda Ellis

First, you should be aware that GRAPHICS 2 interprets text characters differently than GRAPHICS 0. As set up, only uppercase characters are permitted. Lowercase characters, inverse characters, and inverse lowercase characters all appear in distinctly different colors than uppercase text, but still appear as uppercase. The screen editor is set up to work with GRAPHICS 0, which has 40 columns and 24 lines. GRAPHICS 2 has 20 columns and 12 lines. It is possible to use GRAPHICS 2 in place of GRAPHICS 0, in a limited way. Enter this line to see the technique:

GR.2+16:POKE 87,0 The + 16 disables the text window, and POKE 87,0 fools the Atari into thinking it is in GRAPHICS 0. In this mode you will be able to type lines and even cursor around and make changes. The bottom half of the screen will be invisible, so scrolling will be tricky. Also, the cursor will only be visible when resting on a character. It wouldn't be too hard to write a machine language editor for using large size characters (perhaps with GRAPHICS 7).

COMPUTE! welcomes questions, comments, or solutions to issues raised in this column. Write to: Readers' Feedback, COMPUTE! Magazine, P.O. Box 5406, Greensboro, NC 27403. COMPUTE! reserves the right to edit or abridge published letters. ©

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