Difference between revisions of "Mode 4 of CPCs (two bitplanes emulation)"

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m (Ghost'n'Goblins used a 4colour sprite technique, but not mode3)
 
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'''Mode 4 screen (two bitplanes emulation)'''
 
'''Mode 4 screen (two bitplanes emulation)'''
  
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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.
 
  
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Also known as 'Mode 3'.
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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. On the other hand, main disadvantage is that you can use half of available colours for each bitplane. Also known as 'Mode 3'.
  
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Used in games like: [[Mission_Genocide|ZTB-Mission Genocide]] etc..
  
  
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Used in games like: Ghost'n'Goblins, ZTB-Mission Genocide etc..
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<gallery caption="Related articles in Amstrad Computer User & ACPC">
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Image:ChrisWood 4thMode.jpg|By Chris Wood, published on ACU Jan. 1986
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Image:A48 024.JPG|Elmar Krieger's article in ACPC n°48, July 93 (page 1)
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Image:A48 025.JPG|Elmar Krieger's article in ACPC n°48, July 93 (page 2)
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Image:A48 026.JPG|Elmar Krieger's demo listing in ACPC n°48, July 93 (page 3)
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Image:A48 027.JPG|Elmar Krieger's demo listing in ACPC n°48, July 93 (page 4)
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</gallery>
  
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* [[media:RSX sprites toolkit (with gng demo).dsk|DSK with the ACPC listing]]  RUN"DEMO" to watch..
  
 
[[category: programming]]
 
[[category: programming]]

Latest revision as of 11:49, 12 August 2012

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. On the other hand, main disadvantage is that you can use half of available colours for each bitplane. Also known as 'Mode 3'.

Used in games like: ZTB-Mission Genocide etc..


  • Related articles in Amstrad Computer User & ACPC

  • By Chris Wood, published on ACU Jan. 1986

  • Elmar Krieger's article in ACPC n°48, July 93 (page 1)

  • Elmar Krieger's article in ACPC n°48, July 93 (page 2)

  • Elmar Krieger's demo listing in ACPC n°48, July 93 (page 3)

  • Elmar Krieger's demo listing in ACPC n°48, July 93 (page 4)

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