On 10/2/17 9:40 AM, william degnan wrote:
ATA-IDE and SCSI (OK SASI) are about the same age but had
different adoption and growth rates.
Earliest SASI/SCSI was AmproLB+ and Visual 1050 with adaptor. I
have both with hard disks.
FYI the Z80 powered AMPROLB+ was 1984 introduction.
The Commodore D9060/D9090 pre-dates these and was a SASI derivative,
right? Not that it matters which was first, but just wanted to
mention the CBM hard drive too. I have worked with the Visual and CBM
drives, but never seen the AMPRO.
Hi Bill,
I used those as I knew the dates well having them since new.
Ampro was a basic 64K Z80 system with mini (5.25) or micro(3.5) inch
floppy interface and if purchased the 5380 parallel/SCSI/SASI adaptor
chip. With it you could use the varios boards (Adaptec or Xybec) and
the Shugart 20mb SASI drive with the existing software supplied. I
modded the BIOS to adapt it for a Fujitsu 45mb 3.5" SCSI drive a few
years later. and it would work with most current generation SCSI-1
drives save for partitioning and initializing.
The visual was actually older and used TTL to create SASI (scsi look
alike) bus and the same adaptors
and drives to complete the hard disk side like the Ampro.
I still feel the SCSI bus was inspired by IEE488 (GPIB).
In the systems world my first SCSI on VAX was microVAX ba123 (uVAXIIgpx)
with CMD controller
and a RD54(MFM 150mb) on an Adaptec Controller and later replaced with 3
RZ56s (drive with SCSI internal).
Memries of the first SASI/SCSI was 33 years ago for Me, and VAX SCSI was
1995 as that's when I got
the CMD controller.
Allison
Bill
