View source for Mode 4 of CPCs (two bitplanes emulation)

'''Mode 4 screen (two bitplanes emulation)'''

is a software technique to emulate two bitplanes on-screen at once. The main advantage is that you don't need to take care of the background while moving sprites around. Moreover, graphics need 50% less memory space.

Also known as 'Mode 3'.

Used in games like: Ghost'n'Goblins, ZTB-Mission Genocide etc..


<gallery caption="Related articles in Amstrad Computer User & ACPC">
Image:ChrisWood 4thMode.jpg|By Chris Wood, published on ACU Jan. 1986
Image:A48 024.JPG|Elmar Krieger's article in ACPC n°48, July 93 (page 1)
Image:A48 025.JPG|Elmar Krieger's article in ACPC n°48, July 93 (page 2)
Image:A48 026.JPG|Elmar Krieger's demo listing in ACPC n°48, July 93 (page 3)
Image:A48 027.JPG|Elmar Krieger's demo listing in ACPC n°48, July 93 (page 4)
</gallery>

[[media:RSX sprites toolkit (with gng demo).dsk|DSK with the ACPC listing]]

[[category: programming]]