#MAC GS EMULATOR UPDATE#

However it is subject to a number of deficiencies: there is a single buffer for video only - double buffering is not supported - and it supports neither hardware scrolling nor hardware sprites and as all writes into video memory clock the CPU down to 1Mhz these are expensive to perform in software. There is also some support for 'fill mode', in which colour 0 means 'repeat the last non-zero colour', designed to aid in fast single-colour fills.Д¬olours are selected from a 12-bit RGB 4,096 colour palette the IIGS therefore has the same total colour range as its contemporaries the Commodore Amiga, the Atari STE and the Acorn Archimedes. Each line may use any of 16 palettes, making a total of 256 colours on screen without raster-linked palette changes. In addition to RGB emulations of the existing Apple II artefact composite video modes, the IIgs adds 320x200 and 640x200 RGB colour modes the former in various combinations of 16 colours per line and the latter at 4 colours per line (including a hardware dithering mode that acts a little like 16 colours per line).

It runs natively at 2.8Mhz but will slow down to ~1Mhz when in classic Apple II emulation mode or when writing to video memory.

#MAC GS EMULATOR UPDATE#

The central processor is a 65816, a backwards-compatible 16-bit update to the 6502 that was also used in the Super Nintendo.

Mac gs emulator