oot lag counter

http://infrid.com/rcp64/docfiles/n64maps.txt

80F8ED20 to 00000000000000000010000000000000 (+ 0x2000)

80F8ED22 add 0x20 if < 0x20

vc addresses - 0xE74000 = n64 Address

interrupt counter: 0x8000A4CC

game file: 0x8011AC80
update rate: offset: 0x1430 + 0x0110 = uint16_t

start+a+b to reset counter:

0x1600 at address

289F6A88 00000008 --dpad up pressed
04E7E4CC 00000000 --reset vi counter
04F93C30 00000000 --reset game frames
80000005 00000000 --reset register 5 (last real game frames)
8000000A 00000000 --reset register 10 (current 60 fps game frames)
02F8ECB4 00000000 --reset rupee counter to 0
E2000001 80008000

48000000 80F900B0 --load base file ptr to get update_rate (can be moved to be after the frame changed check)
DE000000 80008180 --verify ptr
92110009 00E74110 --load refresh value into register 9
E2000001 80008000

20F93C30 00000000 --check if game frames are 0 (this block ensures a reset doesnt clear the ingame frame counter)
2400181C 00000000 --check if register 5 is bigger than 0 (this means a reset has taken place)
84210005 00F93C30 --write register 5 back to frame counter
E2000002 80008000

2400182C 00000000 --verify reg 9 is > 0
24F93C30 00000000 --check if game frames > 0
82210006 00F93C30 --set register 6 to current real game frames
84210005 00001824 --copy reg 5 (last real game frames) to reg 7
86100007 FFFFFFFF --inverse reg 7
88000006 00000007 --subtract reg 7 from reg 6 and save result in reg 6
24001820 00000000 --check if register 6 is bigger than 0 (this means actual game frames increased)
88100006 00000009 --multiply reg 6 by update_rate (reg 9) = game frames that need to be added to the 60 fps counter
8800000A 00000006 --add reg 6 to reg 10 (new 60 fps game frames)
82210005 00F93C30 --set reg 5 back to real game frame counter

82210002 00E7E4CC --set register 2 to vi frames
8421000A 00001824 --copy reg 10 (60 fps game frames) to reg 7
86100007 FFFFFFFF --inverse reg 7
88000002 00000007 --add register 7 to register 2 and save res in reg 2
26001810 00000FFF --check reg 2 < 4095 ; avoid negative numbers being printed
84110002 00F8ECB4 --store reg 2 at dest (rupee counter for now)
24001810 000003E7 --check reg 2 > 999 ; timer exceeds boundaries, subtract 999 from it for next cycle
86000002 FFFFFC19 --add (subtract) -999 from reg 2
84110002 00F8ECB4 --store new cycle reg 2 at dest (rupee counter for now)
84210002 00E7E4CC --store new cycle reg 2 at vi counter
04F93C30 00000000 --reset game frames for new cycle
80000005 00000000 --reset register 5 (last game frames) for new cycle
8000000A 00000000 --reset register 10 (current 60 fps game frames) for new cycle
E2000005 80008000



OLD VERSION:


289F6A88 00000008 --dpad up pressed
04E7E4CC 00000000 --reset vi counter
04F93C30 00000000 --reset game frames
80000001 00000000 --reset register 1 (whole vi frames)
80000005 00000000 --reset register 5 (game frames)
E2000001 80008000

60000002 0000000P --prepare 2 repetitions of this section to ensure the vi timer cant break ahead

24F93C30 00000000 --check if game frames > 0 (this block ensures a reset doesnt clear the ingame frame counter)
82210005 00F93C30 --set register 5 to game frames
E2000001 80008000

20F93C30 00000000 --check if game frames are 0
2400181C 00000000 --check if register 5 is bigger than 0 (this means a reset has taken place)
84210005 00F93C30 --write register 5 back to frame counter
E2000002 80008000

48000000 80F900B0 --load base file ptr to get update_rate
DE000000 80008180 --verify ptr
92110002 00E74110 --load refresh value into reg 2
E2000001 80008000

24001810 00000000 --verify reg 2 is > 0
82210003 00E7E4CC --load vi frames into reg 3
86100003 FFFFFFFF --inverse reg 3
88000002 00000003 --subtract reg 3 from reg 2 and save result in reg 2
E2000001 80008000

24001810 00000000 --check reg 2 > 0
26001810 00000004 --check if reg 2 < 4 (in this case the register value indicates no processing needs to be done, skip to end)
6600000A 00000000 --skip to end of code
E2000002 80008000
				  --this section is only reached if the whole vi frames increased and lag frames should be updated
86100002 FFFFFFFF --inverse reg 2
84210002 00E7E4CC --store reg 2 at vi frames addr
86000001 00000001 --increase reg 1 by 1
84210001 00001810 --copy reg 1 to reg 2 (store reg 1 at 0x1810)
82210003 0000181C --load game frames from reg 5 into reg 3
86100003 FFFFFFFF --mul reg 3 with -1 (inverse)
88000002 00000003 --add register 3 to register 2 and save res in reg 2
84210002 00001818 --store reg 2 at dest (reg 4 for now)
62000000 0000000P --starts the jump back to the initial section to ensure the vi timer cant jump ahead

E0000000 80008000 --end of code




update rate is 3 input frames per visual frame (jp runs at 20 fps visually)



check if vi frames are 3 (or greater)
set vi frames to 0
increase register 1 by 1
copy register 1 to register 2 (store reg 1 at address of reg 2)
store game frames in register 3
inverse register 3 to be negative (mul with -1 = 0xFFFFFFFF)
add register 3 to register 2 (subtraction, reg 2 add reg 3)
register 2 now contains the total lag frames
store register 2 at destination


80F93C30: game frames