[N64] Ocarina of Time Glitched Subscreen / Inventory

[Sirius902]

What we know:

• This bug affects unmodded roms and not romhacks simply because they have different SHA1 checksums. There's nothing special about the roms' contents.
• Normally, game-specific emulation hacks are enabled by flags in the gamedb, but there are some baked into the copy of Mupen64Plus' core distributed with BizHawk.
• We can't recompile the core right now.
• @steventylerseanherr has (unwittingly?) provided a workaround: change the rom slightly with a hex editor.

Original bug report follows.

---

The inventory screen is glitched for OOT such that when using GlideN64, the inventory screen is always white and when using Glide64mk2 it looks very broken. I suspect it has something to do with some sort of hard-coded Subscreen Delay Fix conflicting with the graphics plugins' framebuffer emulation since the inventory works fine in OOT Randomizer which isn't recognized as OOT and thus the delay fix isn't applied to it.

GlideN64 OOT

Glide64mk2 OOT

GlideN64 OOT Randomizer

[vadosnaprimer]

Test in dev build please.

[Sirius902]

I tested this in the most recent dev build, currently from 2/22, and it still has the same issue.

[steventylerseanherr]

if its still up for testing i can say that the latest release and good dev build does the same

seems to be randomish but i can always trigger it on the platform of links house
all 4 graphics plugins each with a simuler effect
and all 3 display methods

i played around with the dev builds enable fb emulation
and with it ticked off i could cause the glitch anywhere

haha just ask for anymore information if needed

[steventylerseanherr]

update:
sure enough a randomized rom doesnt have this issue
tested on dev build 2019 03 15 151853

[steventylerseanherr]

little more then a month and no response?
guess ill just make another thread then

[YoshiRulz]

We're not really able to fix any bugs in Mupen64Plus until we can build it again. Edit: nm, just re-read the thread. I'll look at the db.
Edit 2: GLideN64_CopyDepthToRDRAM is set on all regions, changing that setting doesn't appear to fix it however.
Edit 3: Removing my copy's region from the db, forcing all defaults for GLideN64, doesn't fix it. If the modded rom works, it's because of the changes made to it. I believe there's an additional key display in the pause screen, maybe ask the devs about that.

[steventylerseanherr]

just tested in more depth
if bizhawk detects a rom with
........THE LEGEND OF ZELDA .......CZLE
specifically the "THE LEGEND OF ZELDA"
then i get a white background on pausing in a 3d area

if i change that to something else then it works as its supposed to

[YoshiRulz]

Wait, it depends on the filename?

[steventylerseanherr]

no
the games title in hex
something to do with rom identification