Posted By
Luca
on 2019-03-15
20:49:56
 |  Re: C16 Hardware Scrolling
Welcome BigFatRed.
You don't need to register in order to fully use this forum. Nonetheless, you can directly ask for a registration, in order to get access to a series of additional features: site's style customizing, log and forum avatars, database editing, on-site instant messages and so on. Nice, but unneded  We only need to be contacted via email, me or Csabo, just to start with a valid email from you, some basic data about you and, if you want to, an 80x80px avatar for the forum and a 120x160px picture of you; afterward, you'll be able to edit your own data page.
Yes, we're following the project of Richard, we're aware of his personal situation and sometimes he pops out on Facebook writing sparse comments; he was trying to buy a Plus/4 just tonite
There's a solid compendium about the memory map of C16 and Plus/4, and long descriptions pf the most important points, thanks to my mate SVS (thanks!), and you can download it from the Tools link above in the main menu, where you will find any other useful utility to help your coding desire: it's the Ultimate Map!
Regarding your specific objective: well, the usual h/v scrolling works exactly like on C64, so you can simply "translate" the most common C64 code slices to the right locations: bits 0/1/2 of $FF06 for the vertical one, and $FF07 of the horizontal one.
Good luck! 
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