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hardware:blitter_programming_model [2010/03/07 16:31]
gilgamesh created
hardware:blitter_programming_model [2010/03/07 22:05] (current)
gilgamesh
Line 2: Line 2:
''BLTCON'' ''BLTCON''
 +
^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^ ^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^ ^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^ ^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^
-|  ASH  |||| usea | useb | usec | used |  LF  |||||||| |  BSH  |||| 0|0|0|0| doff | 0|0| efe | ife | fci | desc | line |+|  ASH  |||| usea | useb | usec | used |  LF  |||||||| |  BSH  |||| 0|0|0|0| doff | 0|0| efe | ife | fci | desc | 0 | 
 +(normal mode) 
 +  * ''ASH'': shift value of source A 
 +  * ''USEA'': use source A 
 +  * ''USEB'': use source B 
 +  * ''USEC'': use source C 
 +  * ''USED'': use destination D 
 +  * ''LF'': performed logic function minterm select lines 
 +  * ''BSH'': shift value of source B 
 +  * ''DOFF'' 
 +  * ''EFE'': exclusive fill 
 +  * ''IFE'': inclusive fill 
 +  * ''FCI'': fill carry input 
 +  * ''DESC'': descending address mode 
 + 
 +^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^ ^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^ 
 +|  START  |||| 1 | 0 | 1 | 1 |  LF  |||||||| |  TEXTURE  |||| 0|0|0|0| sign | 0|0| sud | sul | aul | sing | 1 | 
 +(line mode) 
 +  * ''START'': sttarting point of line 
 +  * ''LF'': performed logic function minterm select lines 
 +  * ''TEXTURE'': 
 +  * ''SIGN'': sign flag 
 +  * ''SUD'': sometimes up or down 
 +  * ''SUL'': sometimes up or left 
 +  * ''AUL'': always up or left 
 +  * ''SING'':single bit per horizontal line (for filling) 
 + 
 + 
 +BLTSIZE, BLTSIZEV, BLTSIZEH 
 +^15^14^13^12^11^10^9^8^7^6^5^4^3^2^1^0^ 
 +|  h  ||||||||||  w  |||||| 
 + 
 +  * ''h'': height in vertical lines 
 +  * ''w'': width in horizontal pixels 
 + 
===== Blitter's Registers ===== ===== Blitter's Registers =====
/var/www/wiki/data/pages/hardware/blitter_programming_model.txt · Last modified: 2010/03/07 22:05 by gilgamesh
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