Processor Direct Slot
PDS interface in the Macintosh Quadra 950
The Processor Direct Slot (PDS) is an Apple slot that is directly connected to the processor bus. This slot has quick access to the processor and main memory.
Apple has used various PDS formats in its computers . There were ethernet cards , graphics cards , PC emulation cards , and accelerator cards . In general, all of these cards will only work on a single computer model or a small group of closely related models at a time.
Computers with PDS were among others
- Macintosh SE / 30
- Macintosh IIci , IIfx
- Macintosh Quadra 700 / 950
- Power Macintosh 6100/60 - / 66, 7100/66 as well as the Power Macintosh 8100/80/100/110 (with the models 7100 / 66AV and 7100 / 80AV, as well as the AV series of the 8100 PPCs , the PDS was standard with a video digitizing card occupied, which was also used as a graphics card)
- Macintosh Performa 6300, 6400 series also have a PDS slot that could accommodate accelerator cards, so that instead of the internally soldered PPC603e / v G2 processor, a G3 processor card took over control of the Macintosh (this slot is actually the Slot for a level 2 cache module, which was equipped with 256 KiB. The slot was misused by the G3 processor card).
- LC II, LC III, LC 475, Performa 475