Overacloud

C’est parti parti pour Mortal Kombat 2 en IMAX mais sans @RetroPoloTV 😅🤣

C’est moi où il y a un gros clin d’œil à @Marcuszeboulet et @Kayane dans le film Mortal Kombat 2 🤩

Vous avez aimé les tweets sur mon hack PlayStation saison 2 ? Vous allez adorer l'article où je raconte tout dans les moindres détails : 👉 numerama.com/cyberguerre/22…

Everything is fried! The console was entrusted to me by Magno LA who could no longer take care of it — get well soon man. It originally belonged to Fred Christopher. #neogeo #aes #backfromdead Fault summary: following the use of an MVS adapter combined with a NeoSD Pro, the console fell into click-of-death shortly after… (basically a console feature indicating the 68000 is in a bad state — one or more main components is not responding as it should) The console wanted to take a vacation but this isn’t the time 😂 Diagnosis details below for the impatient ones 😝 😭 — here are the dead components: Z80 dead 68000 dead Neo-B1 dead LSPC2-A2 (unconfirmed) Work RAM dead (x2) Fast VRAM dead (x2) Diagnosis details: I started with a possible widespread short circuit — the cause can be multiple: incorrect power supply to the board, dead components, main crystal dead. Note: the LSPC2 had already been replaced. I first check the voltages across the main components (BIOS, CPU, YM2610…) and at the output of the power supply circuit — OK. I check all the clocks at the Neo-D0 output, responsible for dividing the 24MHz to feed the other chips — OK. I pull out the Briconeo: first impression, I’m having a lot of trouble running diagnostics on the 68k side (echo, etc.), I’m getting random bus responses on the 68k work RAM, palette RAM, VRAM and fast VRAM diagnostics… The Neo-C1 diagnostic responds well, the LSPC2 beta diagnostic too. I do have a click-of-death telling me something is wrong somewhere and that the console is rebooting trying to recover a good state 😭 However the reset doesn’t seem to respond… the bus might be too busy… So we’re thinking one or more little troublemakers are disturbing the 68000 bus… or several components that may have fried. I go back over the entire board under the microscope — it’s a long process… First step: check what has been modified or replaced. Remove the BIOS to fit a new socket, check for trace cuts, same for the LSPC2-A2. Probe all the TTL circuits (74x…) with the oscilloscope, the BIOS and everything that can interact with the 68k bus. I pull out the thermal camera — an essential tool sometimes… I have a hunch…: the Z80 is running very hot (40°C+), the 2K fast VRAM (40°C+) as well, and this is affecting the internal temperature of the LSPC2 on the right. Two new 2K fast VRAMs are fitted on sockets, and the Z80 is replaced and also socketed. Testing the Z80 in the tester — confirmed dead. Testing the 2K fast VRAMs in the tester — confirmed dead. The replacement is confirmed post-install by a more appropriate temperature reading. Smells like a short circuit that took out components in a chain 😭 While we’re at it, we replace the Neo-B1 too… and we get a more correct display: no more scrambled black image (which looked like a clock issue…) but a slightly pink click-of-death and a reset that works! That’s positive 🎉 We spend 2–4 hours sweeping the entire board on both sides: what’s causing this click-of-death? Given that everything looks fine trace-wise — double checked… We pull out the oscilloscope again and go through the 68k address and data bus — I have some inputs stuck at 0 regardless of reset or anything else… My gut says: let’s swap out this 68k. It’s fairly rare for this kind of component to fry, but there might be a corroded trace underneath — who knows… A new 68k is socketed and swapped in… We get a nice black screen! Well then 🙂 We put in the diagnostic BIOS and the M1 Z80 cartridge, and we get a diagnostic display with sound indicating the Z80 is working but that one of the 68k WRAMs is dead… (this is the 68k’s working RAM where the code lives, etc.) The lower work RAM is KO… we replace both… And we get a working console back 😅😅😅 This one came back from the dead 😀

Vous le savez peut-être, mon compte @psy_massondavid a été piraté. 6 ans de présence quotidienne, des centaines de threads #SantéMentale, une communauté de 22 000 abonnés...possiblement parti en fumée. Alors aujourd'hui c'est mon anniversaire. Ce qui me ferait vraiment plaisir? Vous retrouvez nombreux ici 😊 (Re)-bienvenue !