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Hey Guys....

Lets just back this up with a .bin (coco) and an assembly file .....

this is the new version (double buffered)...

http://cocobotomy.roust-it.dk/source/tunnel.asm

http://cocobotomy.roust-it.dk/bin/tunnel.bin

/Simon

Hey guys... i took the textured tunnel for a bit of a *revisit*.... i decided to animate the texture (plasma) and then rotate the tunnel left/right using sin/cos... total lunacy i know !!!! don't watch it TOO long as it will probably whack yur vision and warp yur mind https://www.youtube.com/watch?v...

Nice one Stew...

you tell me....

i know it works......

/Simon

Hey Stew...

would be good to see *WHATS WHAT* as these routines are purely based on multiple experiments over a couple of years....

no real reason or rhyme, just alot of experiements.....

/Simon

Hey Guys...

i revisited the overscan routine a bit and produced an x zoom using h/w exploits with overscan....

https://youtu.be/Yho4joL4LOk

/Simon

well... you need to work px stuff out 4 yourselves.... (but if you combine the hack with 42 byte dma then its 42*8 = 336 px)..... real HW, well some monitors behave, some don't... this example was a bit *in yur face* eg-pushing quite far into the border.... if you push TOO far, yur monitor is gonna ...

what this is *BASICALLY* doing is a 16/32 byte mode shift on a per line basis....

the sam/vdg *HAVE* to finish the 16 byte mode b4 shifting to the 32 byte, so the excess goes where ? (SIDEBORDER)

/Simon

I'm doing a bit of a kiss 'n' tell series on the coco FB page, so i thought i would share something with you guys too... OVERSCAN http://www.roust-it.dk/coco/ovscan.jpg here is some code to back that up: org $3f00 lda #$ff tfr a,dp sta <$c3 sta <$c5 ;(mode) orcc #$50 ;kill irq/firq lda <$01 ora #5 s...

more colorbend experiments suggest a pattern emerging seems the PAL vdg implementation does totally supress the colorburst in pmode4 (as was intended but not totally on NTSC) but on a PAL coco II there are 50 extra lines (VDG is NTSC) as padding these 50 lines have hsync + colorburst enabled on a dr...

hmmmm....

more experiments

this time the color bled into the border.....