Date: Fri, 13 Oct 2000 00:28:49 -0700 (PDT) From: Heredity Choice <stork@QNET.COM> To: "Person, Roderick" <personrp@ccbh.com> Cc: "'questions@FreeBSD.ORG'" <questions@FreeBSD.ORG> Subject: Re: OT: Alpha hardware help. Message-ID: <Pine.BSI.4.05L.10010130000430.13260-100000@cello.qnet.com> In-Reply-To: <ABC15E2D8FBCD311B4A200805FA7D59B0260401E@1upmc-msx6.isdip.upmc.edu>
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The 3.3 volt connection is used only by relatively rare PCI cards. To be safe, you had best contact the maker of each PCI card you plan to use and ask whether it needs 3.3 volts. J33 takes standard AT connectors. If you really need 3.3 volts, several companies make AT power supplies with 3.3 volts, but these are not cheap. You can take any ATX power supply and splice 2 sets of AT connectors on it in place of the ATX connector. To connect the wires correctly you will need to look in a computer manual that gives the voltage to each pin of an AT and an ATX connector, as well as the J34. On the pair of AT connectors that go into J34 you will have to do a little filing to eliminate the ridges that are there to stop you putting them in the wrong place. When you boot, "BIOS Emulation Ver. 1.7" refers to the SROM. The latest SRM firmware for this board is Ver. 1.6, downloadable from www.compaq.com. You cannot use ARC for FreeBSD, and the flash ROM is only big enough to hold one or the other. These boards will not boot with just any video card. They seem to prefer the older ones. The boot process should take about 2 minutes. Mine has never completed the boot process. After displaying the SROM version it goes to a blue screen with a flashing cursor. Paul Smith On Wed, 4 Oct 2000, Person, Roderick wrote: > I have just acquired an digital AXPpci 33 Alpha motherboard, which i am > dying to get working so I can get FreeBSD on it!! > > Anyone know anything about these, specifically it looks to take a special > power supply, which I am having trouble Identifying. > > from it's manual it states... > > The MLB has two power input connectors (J33 and J34). The main power > > connector (J33) is a 12position (1 x 12) vertical malekeyed > connector. The > mating connectors required by the main power source are a Molex > 90331 > style housing (or equivalent) for positions 1--6 with a key at > position 4, and > a Molex 90331 style housing (or equivalent) for positions 7--12 with > a key > at position 1. > > Connector J34 supplies +3.3 V to the PCI option slots. This is a > 12position (1 x 12) maleshrouded keyed connector. The mating > connectors required by the +3.3 V power source are a Molex 90331 > style > housing (or equivalent) for positions 1--6 with a key at position 5, > and a > Molex 90331 style housing (or equivalent) for positions 7--12 with a > key at > position 6. > > and the pinning is as below: > > Table 2--1 DC Power Connector (±5 V/±12 V) PinOut (J33) > Pin Number Function > 1 POWER GOOD > 2 +5 V > 3 +12 V > 4 12 V > 5 Ground > 6 Ground > 7 Ground > 8 Ground > 9 5 V > 10 +5 V > 11 +5 V > 12 +5 V > > Table 2--2 lists the pins and functions of the dc power connector > (J34). > Table 2--2 DC Power Connector (+3.3 V) PinOut (J34) > Pin Number Function > 1 Ground > 2 Ground > 3 Ground > 4 PCI +3.3 V > 5 PCI +3.3 V > 6 PCI +3.3 V > 7 PCI +3.3 V > 8 PCI +3.3 V > 9 PCI +3.3 V > 10 Ground > 11 Ground > 12 Ground > > Anyone know of a power supply like this or where I can get one, or I'm I > doing some constructing? > Roderick P. Person > Programmer II > Crystal Administrator > (412)454-2616 > personrp@ccbh.com > > "If we knew what it was we were doing, it would not be called research, > would it?" > Albert Einstein > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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