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Title: Boot Block Recovery Procedure for Micronics JX30GC Motherboard
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Filename: JX30GCRC.TXT
Author: Terry Slade, Micro Firmware Technical Support
Revision: 10/10/96
Keywords: JX30GC, M4HS45GC, boot block, recovery
Summary: Instructions for boot block recovery procedure used to
replace BIOS in flash chip on Micronics JX30GC motherboard.
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These boards are identified by the Micronics part number 09-00203
silk-screened onto the back edge of the board behind the card slots.
The boot block procedure is normally used only if there is no BIOS
code or incorrect BIOS code in the flash chip - normally resulting in
a black screen on powerup.
The procedure requires a valid recovery disk, normally created during
installation of a flash BIOS upgrade. We can provide a recovery disk,
if needed, at no charge. Self-extracting ZIP files containing
self-extrating diskette images of recovery disks are available on
on our BBS, FTP site, and web site. The following files contain the
indicated BIOSes:
.
JGC01RD.EXE 0.10 JX30GC-01
JGC02RD.EXE 0.10 JX30GC-02
JGC04RD.EXE 0.10 JX30GC-04
JGCM04RD.EXE 0.10 JX30GC-M04
JGCP05RD.EXE 0.10 JX30GC-P05
JGCA03RD.EXE 0.10 A03 (used in Dell systems)
We sell a BIOS upgrade (part number M4HS45GC) for this motherboard,
based on Phoenix 4.05 code, which includes support for large hard
drives and for Plug-and-Play.
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Boot Block Recovery Procedure:
1. Turn system off
2. Set DIP switches to 25MHz (The boot block program may not load,
resulting in blank screen, if board is runnig at 33MHz)
3. Move jumper W-8 from pins 2-3 to pins 1-2
may also be labelled: NM (normal mode), RC (recovery)
NOTE - There is a version of this motherboard that has a jumper
block labelled W9 next to W8 and also does not have an Opti 82C611
chip at location U29 (just in front of the IDE connector). On this
version of the JX30GC board, a jumper must be installed on W9 in
order to reprogram the flash chip. Without this jumper installed,
error message "The system has an error I.D." will display.
4. Insert recovery disk
5. Turn system on - Screen should display:
Flash memory boot block version F 1.7
Insert disk and press [P] for 1.2M or press [Q] for 1.44
6. Press Q or P - Screen should display:
Reading floppy disk...
Followed by:
Writing flash memory...
Should take about 30-60 seconds - then screen should display:
Flash memory update is done
7. Turn system off, remove diskette
8. Move jumper W-8 from pins 1-2 back to pins 2-3
9. Set DIP switches back to 33MHz (If using 33, 66, or 100 MHz CPU)
10. Turn system on, set values in CMOS SETUP
.
If no response to pressing Q or P, hold down Q or P on powerup so that
the character is in the keyboard buffer before the boot block recovery
program starts.
If the screen says "Reading floppy disk" but doesn't complete in a
minute or so - you may need to temporarily install an external floppy
drive controller and use it instead of the onboard controller - or
just repeat procedure. Also try clearing CMOS RAM (short pins 12 and
24 on Dallas 1287A clock chip or Motorolla 6818 or compatible clock
chip. It may also be helpful to remove a tape drive from the floppy
cable.
If there is only a blank screen after starting system in recovery
mode - there may be no boot block recovery code in the flash chip.
Contact us for replacement or reprogramming of flash chip.
The boot block code will not load if no keyboard is plugged in.
#
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Micro Firmware Technical Support
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Voice 405-321-8333 email support@firmware.com
Fax 405-321-8342 WWW http://www.firmware.com
BBS 405-573-5538 FTP ftp://ftp.firmware.com
Sales 800-767-5465 CIS GO PCVEND Section 8
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(c) 1996 Micro Firmware, Inc.
