Browse Prior Art Database

Flexible Adapter Card

IP.com Disclosure Number: IPCOM000109219D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 2 page(s) / 85K

Publishing Venue

IBM

Related People

Lee, S: AUTHOR [+2]

Abstract

Disclosed is a technique for improved evaluation capability for HDD (Hard Disk Drive) development. An HDD with upload function and special adapter card is used for this purpose. The point of invention is this adapter card.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 53% of the total text.

Flexible Adapter Card

       Disclosed is a technique for improved evaluation
capability for HDD (Hard Disk Drive) development.  An HDD with upload
function and special adapter card is used for this purpose.  The
point of invention is this adapter card.

      HDD is controlled by microcode.  If HDD has upload function,
microcode becomes rewritable, and no hardware change is required for
its up version.

      What is upload function?

      Upload sequence is as follows:
      a.  Connect HDD and power supply
      b.  HDD starts JOB by ROM (Read Only Memory) code after power
on.  ROM code is used for upload purposes only and micro-code is
already downloaded in HDD itself.
      c.  First JOB is to read microcode from the HDD itself and
store it into RAM (Random Access Memory) area.
      d.  After that, HDD restarts JOB by this RAM code. HDD is RAM
code machine.

      What is production code download?

      Production code is stored into HDD itself through interface
connector.  Download sequence is as follows:
      a.  Connect HDD and PC (personal computer) system and power
supply PC system is connected through interface connector microcode
is supplied by floppy disk of PC system.
      b.  HDD starts JOB by ROM code of HDD after power on.
      c.  First JOB is to read microcode from floppy disk and store
it on HDD itself.  Even after power off, this code is not erased.
After power on, this code is uploaded and executed.

      Download and upload is a pair technique.

      What...