COMMODORE PLUS/4 WORLD
  Home  Search  Games  Tapes  Covers  Cheats  Maps  Software  New Stuff 
 Hall Of Fame  HVTC  Game Endings  Features  Solutions  Remakes  Publications  Magazines  Effects  Top List 
 Members  Groups  Plus/4 Encyclopedia  Hardware  Tools  Options  Forum 
Login
Plus/4 EncyclopediaFirstBackNextLast

CPU Speed
Category


Topic
Crystal $FF07 #6 $FF06 #4 $FF13 #1 FPS TED freq CPU freq % PALC64
PAL PAL TRUE FALSE 49.78098 1,773,448 1,145,361 116%
PAL PAL TRUE TRUE 49.78098 1,773,448 778,276 79%
PAL PAL FALSE FALSE 49.78098 1,773,448 1,692,952 172%
PAL PAL FALSE TRUE 49.78098 1,773,448 885,305 90%
PAL NTSC TRUE FALSE 74.07884 2,216,809 1,300,676 132%
PAL NTSC TRUE TRUE 74.07884 2,216,809 947,024 96%
PAL NTSC FALSE FALSE 74.07884 2,216,809 2,115,544 215%
PAL NTSC FALSE TRUE 74.07884 2,216,809 1,106,293 112%
NTSC PAL TRUE FALSE 40.19138 1,431,818 924,723 94%
NTSC PAL TRUE TRUE 40.19138 1,431,818 628,352 64%
NTSC PAL FALSE FALSE 40.19138 1,431,818 1,366,829 139%
NTSC PAL FALSE TRUE 40.19138 1,431,818 714,764 73%
NTSC NTSC TRUE FALSE 59.8086 1,789,773 1,050,119 107%
NTSC NTSC TRUE TRUE 59.8086 1,789,773 764,593 78%
NTSC NTSC FALSE FALSE 59.8086 1,789,773 1,708,014 173%
NTSC NTSC FALSE TRUE 59.8086 1,789,773 893,182 91%


Same table with monospaced formatting:

Crystal $FF07 #6 $FF06 #4 $FF13 #1 FPS TED freq CPU freq % PALC64
---------+---------+---------+---------+---------+---------+---------+---------
PAL PAL TRUE FALSE 49.78098 1,773,448 1,145,361 116%
PAL PAL TRUE TRUE 49.78098 1,773,448 778,276 79%
PAL PAL FALSE FALSE 49.78098 1,773,448 1,692,952 172%
PAL PAL FALSE TRUE 49.78098 1,773,448 885,305 90%
PAL NTSC TRUE FALSE 74.07884 2,216,809 1,300,676 132%
PAL NTSC TRUE TRUE 74.07884 2,216,809 947,024 96%
PAL NTSC FALSE FALSE 74.07884 2,216,809 2,115,544 215%
PAL NTSC FALSE TRUE 74.07884 2,216,809 1,106,293 112%
NTSC PAL TRUE FALSE 40.19138 1,431,818 924,723 94%
NTSC PAL TRUE TRUE 40.19138 1,431,818 628,352 64%
NTSC PAL FALSE FALSE 40.19138 1,431,818 1,366,829 139%
NTSC PAL FALSE TRUE 40.19138 1,431,818 714,764 73%
NTSC NTSC TRUE FALSE 59.8086 1,789,773 1,050,119 107%
NTSC NTSC TRUE TRUE 59.8086 1,789,773 764,593 78%
NTSC NTSC FALSE FALSE 59.8086 1,789,773 1,708,014 173%
NTSC NTSC FALSE TRUE 59.8086 1,789,773 893,182 91%

CPU frequencies in modes where the display enable ("border") bit is is set are lowest guaranteed. Actual frequencies can be 1-3 cycles more per bad/DMA line depending on whether or not the CPU is executing write cycles. This has a theoretical upside potential of an additional 50 3 = 150 cycles per frame. The reference C64 CPU frequency is the maximum frequency with all - character as well as sprite - DMA off.



Copyright © Plus/4 World Team, 2001-2017