fitz@frc2.frc.ri.cmu.edu (Kerien Fitzpatrick) (04/08/91)
Can I purchase a SCSI card for an Apple IIe? I have a spare Adaptec ACB4000A and a couple of 70Mb Micropolis drives that I would like to use. If I must use embedded SCSI I can drum up a 20Mb Rodime or a 60Mb Seagate. Can anyone point me towards the necessary hardware and software to make this work? Please respond via email as I don't read this newsgroup regularly. Thanks, Kerien Fitzpatrick -- Kerien Fitzpatrick Pittsburgh, PA 15213 Field Robotics Center (412)268-6564 The Robotics Institute Internet: fitz@frc2.frc.ri.cmu.edu Carnegie Mellon University
alfter@nevada.edu (SCOTT ALFTER) (04/09/91)
In article <FITZ.91Apr7170931@dirt.frc.ri.cmu.edu> fitz@frc2.frc.ri.cmu.edu (Kerien Fitzpatrick) writes: >Can I purchase a SCSI card for an Apple IIe? Of course. I even have an Apple DMA SCSI card in my IIe to prove it (hooked up to a Conner CP-340 homebrew HD). BTW, is it just me, or does DMA by itself not make a whole lot of difference in the IIe? ProDOS 8 thinks the SCSI card is a SmartPort device, so you can only transfer 512 bytes at a time. I suppose GS/OS accesses files differently, but when's the last time you saw GS/OS running on a IIe? :-) Apple's card is fast enough for most purposes (not to mention that it's compatible with a greater variety of SCSI devices), but if you need more speed, you might be better off spending the extra $$$ for the RAMFast SCSI card (which probably provides more of a performance boost to ProDOS 8 than to GS/OS). One more question: which 8-bit accelerators (if any) will work with DMA on? If none of them will work properly, which combination provides faster disk access: 1 MHz clock and DMA, or an accelerated clock rate and no DMA? Sorry I created more questions than I answered, but these questions have been nagging me for some time and nobody's seen fit to give me an answer...:-) Scott Alfter-----------------------------_/_---------------------------- Support Operation Apple Storm! / v \ Apple II: Internet: alfter@uns-helios.nevada.edu ( ( the power to be your best! GEnie: S.ALFTER \_^_/