Yes I do and I want to get rid off ... so if you find anything interesting let me know and I am not a scrapper or recycler ... all this parts were given to me and yes some machines have diedYou have too many parts, it makes me sad because each part represents a dead machine.
It would be great to make a ROM reader so it was possible to read them without putting them in a computer and know exactly what they are. All the 6100 ones will work in any 6100/7100/8100 so they're easy.Yes I do and I want to get rid off ... so if you find anything interesting let me know and I am not a scrapper or recycler ... all this parts were given to me and yes some machines have died
I would suggest asking for one and replacing the chips with ones from a donor board. So you would want one that is wired right and has the right footprint for apple stock 7500 ROMs.Rats so the search continues
I wish I can make a new one with programmable simms but it’s so strange because there’s no telling what is and isn’t wired rightI would suggest asking for one and replacing the chips with ones from a donor board. So you would want one that is wired right and has the right footprint for apple stock 7500 ROMs.
This one really intrigues me.I wish I can make a new one with programmable simms but it’s so strange because there’s no telling what is and isn’t wired right
its similar but you can tell it’s different by the chip orientationThis one really intrigues me.
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@slomacuser can you photograph the other side?
The issue is we don't know what it is programmed with, but it is similar to a weird ROM I had in an 8600 (which doesn't need a ROM SIMM).
This is mine :
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Chips are oriented the same way. They're not the same PCB layout though, but same chips and almost identical. You need to be comparing my second photo with slomacuser's.its similar but you can tell it’s different by the chip orientation
I see what you mean now very bizarre what did yours do?Chips are oriented the same way. They're not the same PCB layout though, but same chips and almost identical. You need to be comparing my second photo with slomacuser's.
It was in a weird machine that my dad was possibly conned with. It was an 8600/250 "mach5" logic board that someone had fitted to a 200MHz processor to. The 200MHz processor is electrically incompatible with the logic board. I suspect that Apple made the computer fail to boot with the wrong processor, but someone cloned an 8600/200 ROM and fitted it so the computer thought it was the older type 8600.I see what you mean now very bizarre what did yours do?
I find that interesting because as I continue to look for my ROM I’ve found that another user one with a 9500 and actually compatible rom (same checksum) said their 9500 had on board ROMs but also needed a simm with ROMs to start up. LinkIt was in a weird machine that my dad was possibly conned with. It was an 8600/250 "mach5" logic board that someone had fitted to a 200MHz processor to. The 200MHz processor is electrically incompatible with the logic board. I suspect that Apple made the computer fail to boot with the wrong processor, but someone cloned an 8600/200 ROM and fitted it so the computer thought it was the older type 8600.
The powersupply failed after a couple of months, likely due to the wrong processor being fitted. My dad ended up getting another 8600/250, this time fully as it should be. The weird dead machine sat on the side for decades until he sent the logic board to me for something and I was confused why it had a mach5 board, non-mach5 processor and a ROM in the slot and on the board.
Thankfully the board still works.
Development flash roms existed. You needed a "Flash Gordon" Quadra PDS card to program them. I have a box with dozens of them I'd take an offer for in a private message. It's what we used for ROM development in all the first generation PCI machines@slomacuser are there chips on the other side of this one?
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If there are it might be what is needed, although may need reprogramming.
Edit : no, sadly it is single write ROMs. It isn't reprogrammable.
PM comingDevelopment flash roms existed. You needed a "Flash Gordon" Quadra PDS card to program them. I have a box with dozens of them I'd take an offer for in a private message. It's what we used for ROM development in all the first generation PCI machines
Make sure you get one with at least 4MB. You still need to work out how to program it.PM coming
I know the ROMs are online suppose I could flash to a 32 pin plcc?Make sure you get one with at least 4MB. You still need to work out how to program it.
You'd need to flash it to the 8 chips by desoldering them or making some kind of clip, and you'd need to prep the files to flash by aranging them to match how the simm is wired, which would need to be worked out. Sadly it doesn't look like there is enough room to get a socket over top.I know the ROMs are online suppose I could flash to a 32 pin plcc?
I don’t know if I have the smarts for all of that sadlyYou'd need to flash it to the 8 chips by desoldering them or making some kind of clip, and you'd need to prep the files to flash by aranging them to match how the simm is wired, which would need to be worked out. Sadly it doesn't look like there is enough room to get a socket over top.
Working out how the data in the chips is organised would be best done by reading the whole ROM simm, then labelling each chip very carefully and reading them individually and seeing how the data is organised.
It is a 256k module …This one really intrigues me.
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@slomacuser can you photograph the other side?
The issue is we don't know what it is programmed with, but it is similar to a weird ROM I had in an 8600 (which doesn't need a ROM SIMM).
This is mine :
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