John Snook (of this list) modified an Asante network card originally made for the SE/30-IIsi with a 90 degree adapter for me (well, actually he'd made it for himself, and I traded him for the modified Asante and a modified, socketed-CPU logicboard, for a spare DiiMO 50MHz accelerator card for the SE/30 I had ...John is/was great for doing this kind of thing btw, and I still see the occasional post from him here) that allows you to mount an additional card ABOVE (and slightly to the right, and it doesn't interfer with the drive's sheet metal) to mount a secondary card "straight up" off the Asante ...and Asante made provision so you can jumper the machine address of the slot (so the secondary card doesn't interfere with the NIC) AFAIR.
So you *can* use the PDS slot for more than a single card. But you have to be able to set the address of the card you want to use. (I needed a socketed-CPU logicboard to use a Daystar logicboard accelerator that was specifically designed to replace the CPU on the SE/30, and John had the soldering skills to do that with surface mount stuff ...this is the SE/30-specific Daystar accelerator that does *not* use a PDS slot ...which overall setup allows for a NIC, a video card, and an accelerator in a *non*-modified case.) --- brandon davis --- -- sacramento, ca -- ----- Original Messages ----- Compact Macs Digest #2527 2. Re: SE/30 PDS question ---------------------------------------------------------------------- Subject: Re: SE/30 PDS question From: <[EMAIL PROTECTED]> The IIsi PDS adapter has the same pin out as the SE/30. It gives you two pds slots on a riser card. Gamba used to sell a right angle adapter the would let you install an accelerator, an ethernet and a video card on an SE/30. ------------------------------ From: Jeff Walther <[EMAIL PROTECTED]> Subject: Re: SE/30 PDS question I'm pretty sure that the jumpers set which chunk of address space the card uses. In other words, the driver for the card provides the software support so that the CPU can send data to certain addresses which are not in RAM or any of the built-in IO. The PDS card watches for those addresses on the address bus (through the PDS slot) and when a transaction comes along destined for a certain set of addresses, the PDS card handles that transaction. The available address space is allocated to "slots" which would be the NuBus slots in a machine with NuBus. So you can change which "slot" the PDS card is pretending to be in. All it really changes is which set of address the PDS card uses. But since you don't want two PDS cards trying to use the same set of addresses, it's good to be able to change one card's address. Jeff Walther ------------------------------ From: Jeff Walther <[EMAIL PROTECTED]> Subject: Re: SE/30 PDS question Around here somewhere I have an example of what you are looking for. It's the only one I've ever seen. It is a simple splitter for the PDS slot--no circuitry on board. It may actually be for the IIsi rather than the SE/30 as both sockets are at a right angle, which would make a lot more sense for the horizontally oriented IIsi. The manufacturer was SuperMac (the video card company, not the Umax Mac clone company) and it has a heavy metal back on the card. The Daystar adapters typically have one PDS pass-through slot and one "cache" slot that has a bit of circuitry in a PLD to make the "cache" slot look like a IIci slot which is what Daystar's upgrades require. Jeff Walther ------------------------------ From: Clark Martin <[EMAIL PROTECTED]> Subject: Re: SE/30 PDS question The jumpers affect addressing, not timing. I stuck two Asante PDS Ethernet cards in a IIsi once. These cards had a three position switch switch marked (IIRC) "C", "D" & "E". These correspond to three NuBus slots. Even though the IIsi doesn't have NuBus unless you add the adapter the card(s) use the same addressing scheme. In my test with two NICs I set them to unique addresses. The driver software was able to deal with them properly. IIRC I only tested the cards by setting one to AppleTalk and one to IP. -- Clark Martin -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:compact.macs@mail.maclaunch.com> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com ---------------------------------------------------------------
