3.3.3) How can I use a SASI or SCSI interface hard disk?

Shugart Associates System Interface (SASI) ("sassy") was a parallel interface
developed initially at disk drive maker Shugart Associates in the early 1980s,
which was adopted as a formal ANSI standard in June 1986 under the name, Small
Computer Systems Interface (SCSI) ("scuzzy").  SCSI supports many types of
computer peripherals, including hard disk drives.

Many hard disk drives were produced with an embedded disk controller featuring
a SASI or SCSI interface, though only some of these support 256-byte sectors
as required by many Atari SASI/SCSI interfaces.  Suitable SCSI drives meeting
this requirement include: Seagate ST-225N (20MB), Rodime RO650 (10MB) and
RO652 (20MB), Iomega Alpha 10H (10MB) and Beta removable cartridge drives

Also, some hard disk "bridge" controllers allow a ST506 type hard disk to be
attached to a computer's SASI/SCSI interface.  Such controllers were popular
for use with the Atari SASI/SCSI interfaces that require a controller
supporting 256-byte sectors.  Suitable ST506 controllers meeting this
requirement include: Adaptec ACB-4000A (SCSI), Adaptec ACB-4070 (SCSI),
Western Digital WD1002-SHD (SASI), Xebec S1410 (SASI), Xebec S1410A (SASI)

The following are SASI or SCSI interfaces for the Atari that allow the use of
a SASI or SCSI interface hard disk drive.

==> Z-Tec 1000
- SASI host adapter for 64KiB SWP ATR8000
- Attaches to the ATR8000 internally
- SASI Connector: 50 pin Micro-Ribbon
   - Compatibility limited to controllers supporting 256-byte sectors

==> BTL 2004 SASI Hard Disk Adapter, by William Lurie & Associates, 1986
- XL OS Rev.1+ New Device, choice of PBI or Cartridge+ECI connector
- SASI Connector: 50 pin header
   - Supports one or two physical hard drives for 128MB total system
     storage potential
   - Compatibility limited to controllers supporting 256-byte sectors
- BTL Hard Disk System includes:
   - Hard disk drive: 10MB standard; drives up to 85MB were offered
   - BTL 2004 SASI Hard Disk Adapter
   - One of: BTL 2001 PBI Connector or BTL 2002 Cartridge+ECI Connector
      - BTL 2002 includes pass-through cartridge port
   - Supplied with MYDOS 4.
- See: http://www.atarimagazines.com/v5n12/BTLHardDisk.html
       http://www.atarimagazines.com/v6n9/ShoppersGuide.html

==> Supra Hard Disk Interface, by Supra, 1986-1992
    K-Products Interface (KPI), by K-Products, 1992-2002
- XL OS Rev.1+ New Device, connects to PBI
   - Sold separately: Supra XE-XL Buss adapter for Cartridge+ECI
      - Adapter includes pass-through cartridge port
- Hard Disk Drive (SCSI) port: 50 pin header
   - Supports one or two physical hard drives
      - 2nd drive must have the name number of heads and cylinders as the 1st
   - Compatibility limited to controllers supporting 256-byte sectors
   - Hard Disk is divided into two logical drives: D1: is the size of an Atari
     floppy disk (single or double density), and D3: is the remainder of the
     disk.
      - 2nd hard drive is likewise divided, where D2: is the size of an Atari
        floppy disk, and D4: is the remainder of the disk.
   - Atari floppy disk drive should be configured as D2: (1 hard drive system)
   - System normally boots from D1:; hold down [HELP] during startup to boot
     from D2:.
- Supplied with MYDOS 4 and hard drive software utilities
- SupraDrive Atari Hard Disk system includes:
   - SupraDrive AT hard disk drive, one of
      - 10MB drive = Xebec 4000 / Xebec Owl (5.25" SASI)
      - 20MB drive = Miniscribe 8425S (3.5" SCSI) (can anyone verify this????)
   - Supra Hard Disk Interface (including MYDOS 4 and software)
- See: http://www.atarimagazines.com/v5n6/Supradrivefor8Bit.html
       http://www.page6.org/archive/issue_29/page_12.htm
       http://preview.tinyurl.com/nsroe4u

==> Multi I/O board (MIO), by ICD, 1987
- XL OS Rev.1+ New Device, connects to PBI
   - ICD adapter for Cartridge+ECI provides two pass-through cartridge ports
- 256KiB or 1MiB RAM versions
- RamDisk: Use any amount of unit RAM as a RAMdisk
   - Unit has its own power supply, allowing the RAM to retain its memory
     while the computer is off
- Hard Disk (SCSI) port: 50 pin header
   - Connect up to 8 controllers (SCSI specification)
   - Compatibility limited to controllers supporting 256-byte sectors
- RS-232 port: DE-9S (Atari 850 standard)
   - R: device handler (850-compatible) on ROM (uses no user memory)
   - Up to 19.2 kbit/s
   - Hardware flow control (not all ROM versions)
- Menu program on firmware ROM
   - Accessed by holding down the SELECT key while booting or by holding down
     SELECT and pressing RESET
      - Menu loads into the computer's main memory (RAM)
   - Allows booting booting from RamDisk or Hard Drive
   - Allows partitioning of hard drives and RAM for RamDisks (up to 8 total
     drives)

==> Black Box, by Computer Software Services (CSS), 1989
- XL OS Rev.1+ New Device, with connectors for both PBI and Cartridge+ECI
   - PBI Connector: 50 pin header; ribbon cable to PBI interface included
   - Cartridge+ECI connector: standard PCB edge
- RS-232-C Serial Port: 34 pin PCB edge
   - R: device handler (850-compatible) on ROM (uses no user memory)
   - Up to 19.2 kbit/s
   - Hardware flow control
- SASI/SCSI Hard Disk Port: 50 pin header
   - Connect up to 8 controllers (SCSI specification)
   - Hard disk floppy drive emulation (Single or Double density)
   - Compatibility includes controllers supporting 512-byte sectors
   - Manage up to 96 drive partitions, including write-protection
- High speed disk I/O: Happy, XF551, UltraSpeed
- Built-in 6502 machine language monitor
- Software utilities, including MYDOS and hard drive utilities, on disk
- Black Box Enhancer (upgrade for older units; included with newer units):
   - Enhanced printing functions, Task Master sector editor, Archiver program
- Developer page: http://www.nleaudio.com/css/products/black.htm
- Mathy van Nisselroy's Black Box page:
  http://www.mathyvannisselroy.nl/blackbox.htm

==> Multi I/O board (MIO) "new series" by Ken Jones / MEtalGuy66, 2006
Equivalent to the original ICD MIO, 1MiB RAM version, with improvements:
- RS-232 port: DE-9P (IBM PC standard)
- Hard Disk (SCSI) port:
   - Compatibility includes controllers supporting 512-byte sectors
- Available: http://www.rasterline.com/
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