CPU Speed - Plus/4 Encyclopedia



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

CPU Speed

Category
Hardware

Topic

crystal	FF07 #6	FF06 #4	FF13 #1	FPS	TED freq	CPU freq	% PALC64
PAL	PAL	TRUE	FALSE	49.86075967	1,773,448	1,147,196	116%
PAL	PAL	TRUE	TRUE	49.86075967	1,773,448	779,523	79%
PAL	PAL	FALSE	FALSE	49.86075967	1,773,448	1,695,665	172%
PAL	PAL	FALSE	TRUE	49.86075967	1,773,448	886,724	90%
PAL	NTSC	TRUE	FALSE	74.22021478	2,216,809	1,303,159	132%
PAL	NTSC	TRUE	TRUE	74.22021478	2,216,809	948,831	96%
PAL	NTSC	FALSE	FALSE	74.22021478	2,216,809	2,119,581	215%
PAL	NTSC	FALSE	TRUE	74.22021478	2,216,809	1,108,405	113%
NTSC	PAL	TRUE	FALSE	40.25579172	1,431,818	926,205	94%
NTSC	PAL	TRUE	TRUE	40.25579172	1,431,818	629,359	64%
NTSC	PAL	FALSE	FALSE	40.25579172	1,431,818	1,369,019	139%
NTSC	PAL	FALSE	TRUE	40.25579172	1,431,818	715,909	73%
NTSC	NTSC	TRUE	FALSE	59.92274340	1,789,773	1,052,124	107%
NTSC	NTSC	TRUE	TRUE	59.92274340	1,789,773	766,052	78%
NTSC	NTSC	FALSE	FALSE	59.92274340	1,789,773	1,711,274	174%
NTSC	NTSC	FALSE	TRUE	59.92274340	1,789,773	894,886	91%

Same table with monospaced formatting:


crystal   FF07 #6   FF06 #4   FF13 #1   FPS         TED freq    CPU freq    % PALC64
---------+---------+---------+---------+-----------+-----------+-----------+---------+
PAL       PAL       TRUE      FALSE     49.86075967   1,773,448   1,147,196      116%
PAL       PAL       TRUE      TRUE      49.86075967   1,773,448     779,523       79%
PAL       PAL       FALSE     FALSE     49.86075967   1,773,448   1,695,665      172%
PAL       PAL       FALSE     TRUE      49.86075967   1,773,448     886,724       90%
PAL       NTSC      TRUE      FALSE     74.22021478   2,216,809   1,303,159      132%
PAL       NTSC      TRUE      TRUE      74.22021478   2,216,809     948,831       96%
PAL       NTSC      FALSE     FALSE     74.22021478   2,216,809   2,119,581      215%
PAL       NTSC      FALSE     TRUE      74.22021478   2,216,809   1,108,405      113%
NTSC      PAL       TRUE      FALSE     40.25579172   1,431,818     926,205       94%
NTSC      PAL       TRUE      TRUE      40.25579172   1,431,818     629,359       64%
NTSC      PAL       FALSE     FALSE     40.25579172   1,431,818   1,369,019      139%
NTSC      PAL       FALSE     TRUE      40.25579172   1,431,818     715,909       73%
NTSC      NTSC      TRUE      FALSE     59.9227434    1,789,773   1,052,124      107%
NTSC      NTSC      TRUE      TRUE      59.9227434    1,789,773     766,052       78%
NTSC      NTSC      FALSE     FALSE     59.9227434    1,789,773   1,711,274      174%
NTSC      NTSC      FALSE     TRUE      59.9227434    1,789,773     894,886       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.