hyperneogeo
Well-known member
Last in the odd series. Found this PPC without a label, looked inside and found a few fun things.
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Odd Power Macintosh 7xxx? Setup
- Thread starter hyperneogeo
- Start date
belgaonkar
Well-known member
Looks like an EVT 7300.
hyperneogeo
Well-known member
Unfortunately the HDD was DOA. It's completely dead, so I'm trying to swap HDD pcbs on it to see if that works. (I tried a direct swap with another one and it booted, but I think the head is messed up or something)
In other news, I booted the Mac up with MacTest and the following came out of it:
It read the model as a Power Macintosh 8500 with a Production date of Jan 2nd 1989 lol.
The CPU card is an Apple 604EV 400mhz card
Interesting to say the least!
belgaonkar
Well-known member
Very Interesting. Although the 8500 was a tower style case. Also the 8500 had a max clock speed of 180 mhz whereas this is a 400MHZ. This could have been an unreleased Mac based off the 8500 motherboard.
EvilCapitalist
Well-known member
Interesting indeed, does the processor card have a date on it anywhere? If memory serves me there weren't any shipping machines (from Apple at least) that had a 400MHz 604ev.
hyperneogeo
Well-known member
it has a copyright 1996,1997 on it. and something that says 09782. Possibly a date code? Dunno
hyperneogeo
Well-known member
Sure. It's also worth noting that the card itself has 300 mhz crossed out and 400 mhz put into it's place. I was curious, so I looked underneath the heatsink and it was a a 300mhz EV Engineering Sample with 1MB cache. So I guess they overclocked it.
hyperneogeo
Well-known member
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EvilCapitalist
Well-known member
It looks like it has the header for the AV ports (34 pin connector above the first PCI slot) but it's definitely not a standard 8500 board since the connectors at the top of the board are perpendicular as opposed to parallel to the board and the connectors for the speaker and front LED are different as well (see below for a standard board)
I'm wondering if the previous owner swapped the ROM SIMM for an 8500 into a 7xxx board. I've never tried it with mine since my 8500 is packed away far from me but it seems reasonable that if you did that the machine would identify as an 8500 as opposed to whatever this is / was supposed to become (7700?)
I'm wondering if the previous owner swapped the ROM SIMM for an 8500 into a 7xxx board. I've never tried it with mine since my 8500 is packed away far from me but it seems reasonable that if you did that the machine would identify as an 8500 as opposed to whatever this is / was supposed to become (7700?)
I actually recently heard something different from defor, although we didn't get into the details of what's happening. I'm going to be trying ot get an 8600/300 this summer so I can take a look at this and try to get it going then.
Of course, the 8600 and 9600 have the non-mach5/ev variants that accept all the same cards as the older powersurge systems and all those cards should work on those earlier boards, and possibly the mach5/ev versions.
Compgeke
Well-known member
Unlikely to be a swap as the board isn't any sort of standard board. The 820-0391-02 P/N doesn't align with anything, it's blue and it has a 400 MHz unreleased CPU. Add in the unmarked chassis, the "Test Purpose Only" hard drive and "Sample for Evaluation Only" CD and we get a prototype for an unreleased machine of some sort.
[NITPICK]
1) The 7500, 8500, 7600, 8600, and 7300 motherboards have the same form factor, but the 7600/8600 changed the power supply connector. The 7300 uses the 7600 style connector.
2) There were two version of each of the 8600 and the 9600. There was the original 8600/9600 with the 343S0280 - 343S0283 ROM chips and cache on the 9600 logic board. These original models use the same CPU cards as the X500 machines.
Then there were the 8600 Enhanced and the 9600 Enhanced, which are also called Kansas machines. They use the CPU cards witht he Mach V PPC604ev CPUs. They have 343S0380 - 343S0283 ROM chips. The 9600 Enhanced has no cache chips on the logic board but otherwise (except for minor rearrangement of CPU slot pins) is identical to the earlier 9600 logic board. I have never mapped it out, but I suspect the only real difference in the CPU slot pinout is more 3.3V supply pins on the Mach V cards.
3) ROM for the 8500 and 7500 and 7600 (and 9500 and most 7200s) were identical. So moving a ROM DIMM from an 8500 to a 7500 or 7600 would not change anything. Moving said ROM DIMM to a 7300 would make a change, as the 7300 uses the same ROM as the original (non-Kansas) 8600/9600.
[\NITPICK]
I suspect what the OP has there is a 7300 variant that actually supported the Mach V processor (changes in the CPU slot pinout). The 7300 came out with the 8600/9600 Enhanced, IIRC, yet had the ROM of the original 8600/9600 and did not support Mach V.
It would have made sense for there to be an unreleased 7300 which was consistent with the 8600/9600 Enhanced and had a Kansas motherboard supporting Mach V CPU cards.
1) The 7500, 8500, 7600, 8600, and 7300 motherboards have the same form factor, but the 7600/8600 changed the power supply connector. The 7300 uses the 7600 style connector.
2) There were two version of each of the 8600 and the 9600. There was the original 8600/9600 with the 343S0280 - 343S0283 ROM chips and cache on the 9600 logic board. These original models use the same CPU cards as the X500 machines.
Then there were the 8600 Enhanced and the 9600 Enhanced, which are also called Kansas machines. They use the CPU cards witht he Mach V PPC604ev CPUs. They have 343S0380 - 343S0283 ROM chips. The 9600 Enhanced has no cache chips on the logic board but otherwise (except for minor rearrangement of CPU slot pins) is identical to the earlier 9600 logic board. I have never mapped it out, but I suspect the only real difference in the CPU slot pinout is more 3.3V supply pins on the Mach V cards.
3) ROM for the 8500 and 7500 and 7600 (and 9500 and most 7200s) were identical. So moving a ROM DIMM from an 8500 to a 7500 or 7600 would not change anything. Moving said ROM DIMM to a 7300 would make a change, as the 7300 uses the same ROM as the original (non-Kansas) 8600/9600.
[\NITPICK]
I suspect what the OP has there is a 7300 variant that actually supported the Mach V processor (changes in the CPU slot pinout). The 7300 came out with the 8600/9600 Enhanced, IIRC, yet had the ROM of the original 8600/9600 and did not support Mach V.
It would have made sense for there to be an unreleased 7300 which was consistent with the 8600/9600 Enhanced and had a Kansas motherboard supporting Mach V CPU cards.
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AlpineRaven
Well-known member
That 820-0391-02 P/N doesnt come up, but 820-0391-A is 8600.
I am thinking it couldve been a testing machine before G3?
Does the CPU actually show 400mhz because I was looking on one of the photos its showing 300mhz on one of the jumpers even though it is texta'd as 400mhz? I am interested to see the CPU to see whats the difference is..
Cheers
AP
I am thinking it couldve been a testing machine before G3?
Does the CPU actually show 400mhz because I was looking on one of the photos its showing 300mhz on one of the jumpers even though it is texta'd as 400mhz? I am interested to see the CPU to see whats the difference is..
Cheers
AP
