Search results
Mar 31, 2010 · The "Horizontal Scrolling" section implies that the VDP handles locally whether either background A or B is scrolled full screen, split at the first 8 lines and then full screen, individual 8 line rows, or individual lines. If this is the case, it also implies that the 68000 is impacted by the effect of "parallax" very little or not at all.
The type of scrolling is set by the VDP registers and applies to both planes (each plane cannot have a different scroll type). For full-screen scrolling, the horizontal scrolling table contains just two entries, one for plane A and one for plane B. Each entry is 2 bytes in size and contains the scroll offset, which is a number between 0 and 1023.
Apr 2, 2010 · At any rate, the Genesis' Cell scroll method being advertised by the VDP's registers is a really obvious reason why we see more scrolling in Genesis games. The SNES not having a "Mode" for that many scrolls is probably why developers didn't hand code it (and subsequently why fans of the hardware have no appreciation for 8-10 scrolls).
Apr 6, 2010 · The only major differences are that the SNES has for scrolling are: - Offset per tile mode (seldom used) - Can scroll 1-tile wide columns (MD does 2-tile wide columns) - The extra 2bpp layer in Mode 1 - Mode 0 (very seldom used) - Mode 7 (our favorite!) I don't believe there is anything else related to scrolling the SNES can do that the MD cannot.
If whole plane scrolling is enabled, the VDP high word will scroll the FG plane, and the low plane will scroll the BG plane. Note that the plane will wrap once it reaches the edge of the plane's size. When per-row horizontal scrolling is enabled, every longword in the HScroll table will tell the VDP how much to scroll every 8-pixel row on-screen.
The VDP’s planes support an important function for 2D games: scrolling. The 68000 can tell the VDP to scroll one or both planes independently of each other either horizontally, vertically, or on both axes. This scrolling can be done pixel-by-pixel, meaning the scrolling movement is smooth, and the speed of the scrolling can be adjusted.
People also ask
Can a VDP scroll a plane horizontally or vertically?
What is vertical scrolling?
How many scrolling background planes does the VDP support?
What are the different types of horizontal scrolling?
What is a horizontal scrolling table?
What is hscroll in VDP?
Horizontal Scrolling. Each Scrolls can be scrolled horizontally on different basis : Overall; One CELL unit; One line unit; This is selected via the vdp register 0xB. Table format. The HScroll table is in the VRAM and its address is setup via the vdp register 0xD. ScrollA and ScrollB both use this table alternately.
