Attached is RC1 playable games for creatiVision.

Here's how this buffer overflow works - and the available addresses. A63F: lda $a8 A641: beq $a646 A643: jsr $a76b A76B: tax A76C: dex A76D: lda $a77a, x A770: pha A771: lda $a78b, x A774: pha A775: lda #$00 A777: sta $e0 A779: rts By making the string too long for BASIC, it tries to copy to RAM. On...

Multicolour Mode Here's a short program that will change VDP register 1 by setting M2 - thereafter use CHAR to plot each block of 4 colours. basic83b-002.png 5 CLS 12 REM *** Set VDP Register 1 to $EA *** 10 POKE 218,234 20 POKE 219,1 30 POKE 846,0 40 PRINT "A"; 50 GOSUB 9800 60 FOR A=0 TO 255 70 C...

BASIC Sprites ... a small step for man, a giant leap for blue boxes Here's the background, hopefully you can make it better! Some information on how BASIC manages the screen display will make it all clear - or not - if in doubt - just mirror it :lol: ! BASIC sets the VDP with these defaults +------...

While looking at converting BASIC to GPL - I got distracted with BASIC!

Here's a little tech demo - showing how to do SPRITES in plain old BASIC - No ASM, No GPL - just any old BASIC cartridge.

There are some limitations - but those are for another time

Cheers Tom! - nice to see on a CV!

Eagerly awaiting real hardare stats

This is CV Demo #5

The BASIC version you can see the little green man go across the top of the screen, while the logo is downloaded to VRAM,

BASIC takes around a minute to complete the logo.

GPL takes a little under 3 seconds

OK - here's a minimal graphics example from http://www.madrigaldesign.it/creativemu ... xample.zip converted to GPL.

A nice little goldfish

BASIC Color Character Sets I thought it may be worth while to copy a BASIC demo to GPL, just to do a performance comparison. COLOR 0 is the background colour, VDP register 7. However BASIC always sets it to foreground Transparent, Background colour. So COLOR 0,2,2 would give VDP Register 7 == 01 No...