Author Topic: edn8 fw1.2 savestates not works sd defragged  (Read 2765 times)

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Offline Arnold101

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edn8 fw1.2 savestates not works sd defragged
« on: January 01, 2020, 03:10 AM »
edn8 fw1.2 savestates not works on super mario, contra, and many other games i tried. They glitch or black screen and only sound, i have original famicom with nesrgb
i also readed from krikkz about fragmenting but i done a defrag of the 4gb sd but nothing changed, how i can fix this? i assume that now savestates are working for all mappers as read me says

also lagrange point..intro sound is buzzing. at 160% volume is low, on the other end at 200 is huge and distorted and impossible to use, a way half is possible?
« Last Edit: January 01, 2020, 03:45 AM by Arnold101 »

Offline KRIKzz

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #1 on: January 01, 2020, 09:32 PM »
og-n8 losts screen colors when using save states if your system has early PPU revision which is not allows to read palette back from ppu. This for sure not related to sd or fragmentation. also og-n8 does not have amplifier for expansion audio so volume levels is limited, especially if you using og-famicom

Offline Arnold101

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #2 on: January 02, 2020, 12:01 AM »
og-n8 losts screen colors when using save states if your system has early PPU revision which is not allows to read palette back from ppu. This for sure not related to sd or fragmentation. also og-n8 does not have amplifier for expansion audio so volume levels is limited, especially if you using og-famicom
understood..so is not fixable? why some games save states works fine?

Offline KRIKzz

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #3 on: January 02, 2020, 12:09 AM »
I wonder if it happens with older OS versions?

Offline Arnold101

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #4 on: January 02, 2020, 12:16 AM »
I wonder if it happens with older OS versions?
i can try. wich version?

Offline KRIKzz

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #5 on: January 02, 2020, 12:35 AM »
I wonder if it happens with older OS versions?
i can try. wich version?

1.16

Offline Arnold101

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Offline KRIKzz

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #7 on: January 15, 2020, 11:49 PM »
N8-OG save state core expects PPU palette can be read back from PPU, but at least one PPU revision not allow read palette values from palette ram, it just return garbage values. Save states will not work properly on systems with such ppu revision. By the way, original famicom is the system where such ppu is the most common. I seen them personally only in og-famicom and in some clones.
Also cart saves system state and mapper registers, but does not save/restore ym2413 state, so audio glitches in lagrange point is quite possible.

Offline Arnold101

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #8 on: January 16, 2020, 12:55 AM »
N8-OG save state core expects PPU palette can be read back from PPU, but at least one PPU revision not allow read palette values from palette ram, it just return garbage values. Save states will not work properly on systems with such ppu revision. By the way, original famicom is the system where such ppu is the most common. I seen them personally only in og-famicom and in some clones.
Also cart saves system state and mapper registers, but does not save/restore ym2413 state, so audio glitches in lagrange point is quite possible.
yeah, the strange thing is that in a very few games the save state works

Offline KRIKzz

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Re: edn8 fw1.2 savestates not works sd defragged
« Reply #9 on: January 16, 2020, 01:20 AM »
N8-OG save state core expects PPU palette can be read back from PPU, but at least one PPU revision not allow read palette values from palette ram, it just return garbage values. Save states will not work properly on systems with such ppu revision. By the way, original famicom is the system where such ppu is the most common. I seen them personally only in og-famicom and in some clones.
Also cart saves system state and mapper registers, but does not save/restore ym2413 state, so audio glitches in lagrange point is quite possible.
yeah, the strange thing is that in a very few games the save state works

Those games likely constantly refresh palette, so even if save states broke the colors they will be restored at next frame.