Updated documentation for sprites, tilemap and dma

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Alcoholics Anonymous
Posts: 495
Joined: Mon May 29, 2017 7:00 pm

Updated documentation for sprites, tilemap and dma

Post by Alcoholics Anonymous » Wed Feb 27, 2019 3:16 pm

New documentation has been posted:

Sprites:
https://www.specnext.com/sprites/

This hadn't been updated for a year so there is quite a bit new there, including descriptions of 4-bit sprites, relative sprites and the nextreg interface.


Tilemap:
https://www.specnext.com/tilemap-mode/

One incompatible change since it first appeared in how 512-tile mode is selected. Instead of requiring the ULA to be turned off for this, it is selected by a separate nextreg bit so you can still combine the ULA screen and the 512-tile mode screen.


DMA:
https://www.specnext.com/the-zxndma/

Description of how the prescalar is calculated for sampled audio.
Otherwise mainly additions for improved compatibility with the Z80-DMA which shouldn't affect normal usage.

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varmfskii
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Location: Albuquerque, NM USA

Re: Updated documentation for sprites, tilemap and dma

Post by varmfskii » Wed Feb 27, 2019 4:15 pm

Noticed and appreciated!
Backer #2741 - TS2068, Byte, ZX Evolution

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