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n2mt28a.exe Reference Disk for PCI/MCA models v1.20 (zipped image)
687686DG.EXE Diagnostic Disk for 6876/6886 (zipped image)
6886R_J.EXE Reference Disk v1.20 (same files as above + readme) (zipped image)
6886D_J.EXE Diagnostic Disk (same files as above) (zipped image)
6886J.zip Reference & Diagnostic Disks (contains the *_J.EXE files above)
t3gt03a.exe Enhanced Diagnostics Diskette for 62xx, 65xx, 68xx incl. 6876 & 6886
n2jt48a.exe Flash Update v48a (readme) (changes)
n2jt50a.exe Flash Update v50a (readme)
n2jt52a.exe Flash Update v52a (readme)
n72t00a.exe S3 864/868 Video for Windows 3.1 6875, 6876, 6885, 6886
z01t37a.exe S3 864/868 Video for OS/2 6575, 6585, 6875, 6885, 6876, 6886 - 1/2 (readme)
z01237a.exe S3 864/868 Video for OS/2 6575, 6585, 6875, 6885, 6876, 6886 - 2/2
z08t02a.exe S3 864/868 driver Windows NT 4.0 6875, 6885, 6876, 6886 (readme)
700aud.exe Crystal Audio Drivers OS/2 Warp 6875, 6885, 6876, 6886 (uninstall notes)
750QA523.EXE QaPlusPro Diag for 68xx v5.23
700QA542.EXE QaPlusPro Diag for PC300/700 series v5.42B
IBM Personal Computer HMM, 300 Series, 700 Series, IntelliStation (Jun 1998)
IBM Personal Computer HMM, 300 Series, 700 Series, IntelliStation (Mar 1999)
68xx Parts Catalog (EPRM)
PC-730/750 (6875 6876 6885 6886) System Board Locations (EPRM)
PC 100-300/700 Series - Server 310/315-RISER Card Layout (EPRM)
Official Product Page
and Software and Drivers (both dead)
PC720/750 PCI/Micro Channel Product Page (6860-J4G/J0x/JZG, 6886-J04)
PC750 PCI/ISA Product Page (6885-JOM)
PC750 PCI/ISA Product Page (6885-JGM)
PC750 PCI/ISA Product &
Specs Page (6883-J0P/J8P/J0M)
PC330/350/750 Product Page (6577-JBx/J2x, 6587-JUx, 6887-JSx/J8x/JHE)
PC330/720/750 PCI/ISA Product Page (6873, 6863, 6883-JFx/JAP/JTN, 6887-JSx/J8x)
PC330/350/365/750 Product &
Specs Page (6577-JBx/J2x, 6587-JP6/JUx, 6589-12J, 6887-JHE)
Official Japanese product pages (archived).
US5765008 Personal computer with riser card PCI and micro channel interface (Google Patents)
PC 730/750 Planar
Jumper Settings
Memory
L2 Cache
Video
CPU Upgrade
MCA Riser Card
IDE Controller and Win95
BIOS may not recognize HD > 4.2GB
What to do if wrong BIOS Flash applied
Unplug Power Before Removing the HDD Cage
Content created by Sandy. Edited by Major Tom.
PC 730/750 Planar Pentium 75/90/100/120/133 MHz, FRU P/N 11H5545 (outline by IBM)
1 Bus riser slot
2 (J15) Modem Ring Detect connector
3 (J29/WP) Diskette drive write protect
4 Diskette drive connector
5 HDD connectors (0: Prim, 1: Sec)
6 (J38) On/Off Switch PSU connector
7 (J37) On/Off Switch connector
8 Power supply connectors
9 L2 Cache size jumpers
10 ZIF Socket 5
11 (J19) Bus/Core Ratio
12 Cache sockets
13 72-pin SIMM sockets (Bank 2)
14 72-pin SIMM sockets (Bank 1)
15 72-pin SIMM sockets (Bank 3)
16 Video memory connectors
17 (J40/PWD) Power-on password jumper
18 Battery
19 Display connector
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20 Parallel port
21 DE9 Serial port
22 DE9 Serial port
23 Mouse port
24 Keyboard port
25 Audio jack (Input jack)
26 Audio jack (Output jack)
27 IDE CD-ROM audio connector
28 (J28) Mouse jumper
29 (J26/J27) Bus/CPU speed select
30 Hard Disk (1-2) / Power LED (3-4)
31 Fan Header
32 Front-Panel (Audio)
33 Speaker (3-4)
34 Power Connector
35 Mute (Audio)
36 Mute (Audio)
37 AUX1 (CD-ROM)
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Jumper Settings
The jumper setting information
| Jumper |
Setting |
Description |
| J19 |
Open
Short |
2/3 Bus/Core Ratio
1/2 Bus/Core Ratio |
| J28 |
1-2
2-3 |
Mouse enabled
Mouse disabled |
J29
(WP) |
2-3
1-2 |
Enable writing to a diskette
Disable writing to a diskette. |
J40
(PWD) |
1-2
2-3 |
Password enabled.
Password reset. |
RED is default.
Bus/CPU Speed MHz Setting
| Jumper |
50/75 |
60/90
60/120 |
66/100
66/133 |
| J26 |
2-3 |
2-3 |
1-2 |
| J27 |
2-3 |
1-2 |
1-2 |
Cache Jumper Settings
| Cache |
J21 |
J22 |
J23 |
J24 |
| 256 KB |
1-2 |
1-2 |
1-2 |
1-2 |
| 512 KB *1 |
1-2 |
1-2 |
2-3 |
2-3 |
| 1 MB *2 |
2-3 |
2-3 |
2-3 |
2-3 |
Never seen a 512KB or 1MB cache module.
*1 Option Guide doesn't mention about 512KB setting.
It's written in Product Index stored in IBM WEB Site.
*2 TAG RAM: Socket #10 is vacant for stock 256KB configuration. According to the
manual, one more TAG RAM should be installed in socket #10 for 1MB cache
configuration.
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Originally 8 cache chips are installed in sockets 2 to 9. Each cache chip
should be installed like illustrated in the picture.
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Memory
You can use 32MB 60 ns/70 ns Parity SIMMs.
6885 (PCI/ISA version) can take EDO SIMMs but I have not tested EDO on
mine.
Sander Fransen wrote in his page
that 6863 could take EDO SIMMs. 6886 could do that too.
Watch SIMM socket
layout. BANK 1 sockets are the two in the middle (#14 in the layout picture above).
| FRU | Size | Parity | Applicable Systems |
|---|
| 73G3233 | 4 MB | YES | 6875, 6876, 6885, 6886 |
| 92G7521 | 8 MB | YES | 6875, 6876, 6885, 6886 |
| 60G2950 | 16 MB | YES | 6875, 6876, 6885, 6886 |
| 73G3135 | 32 MB | YES | 6875, 6876, 6885, 6886 |
|
| 92G7540 | 4 MB | | 6571, 73, 75, 6581, 83, 85 |
| 60G2900 | 4 MB | | (tin contact) 6576, 6586 |
| 92G7542 | 8 MB | | 6571, 73, 75, 6581, 83, 85 |
| 92G7245 | 8 MB | | (tin contact) 6576, 6586 |
| 92G7544 | 16 MB | | 6571, 73, 75, 6581, 83, 85 |
| 92G7247 | 16 MB | | (tin contact) 6576, 6586 |
| 92G7546 | 32 MB | | 6571, 73, 75, 6581, 83, 85 |
| 92G7249 | 32 MB | | (tin contact) 6576, 6586 |
Source: 'IBM PC and PS/2 Pocket Reference Manual' S41G5086-03. (thx
Tim O'Connor)
L2 Cache
| FRU | Size | Applicable Systems |
|---|
| 06H4759 | 128 KB | 6571, 6573, 6581, 6583 |
| 06H4760 | 256 KB | 6571, 6573, 6581, 6583 |
| 06H6052 | 256 KB | 6875, 6876, 6885, 6886 |
| 06H7586 | 256 KB | 6576, 6586 |
| 92G7552 | 1 MB | 6875, 6876, 6885, 6886 |
Source: 'IBM PC and PS/2 Pocket Reference Manual' S41G5086-03. (thx Tim
O'Connor)
Video
Onboard video chip is S3 Vision 868. Video Disable jumper is not ready on
the planar. If you want to use a PCI video card under Windows 95, disable S3
video under Device Manager section of the Control Panel.
PCI Video card known to be usable on this machine:
S3 Virge DX4 based card
Matrox Mystique
Matrox Millenium
Matrox Millenium II
CPU Upgrade
The Planar itself supports Classic Pentium CPUs rated up to 133 MHz.
VRM socket is not ready on the Planar. In order to use CPU rated higher than
133 MHz, you need an interposer. For MMX CPU, you need an interposer with a
voltage regulator. K6-II/III-400 can be used with an appropriate interposer.
PowerLeap interposer is my favorite one. Connect the power connectors firmly or
your interposer (and your K6 CPU) will get toasted
(Ed. really?).
I've tested following CPUs and all of them worked nicely on an PowerLeap
Interposer (PL-ProMMX Plus):
- MMX166 and 233
- K6-300
- K6-II/400
- K6-III/366 and 400
K6-III series require PL K6-III, PL-ProMMX Plus doesn't work (for me).
AMDK6UPD.EXE
is required to use K6-2/350 or faster on Windows 95B/95C (OSR2/2.1/2.5). Japanese explanation is HERE.
Also refer to Knowledge Base Q-235249 if you use MS Backup.
For Japanese readers:
PKK6.ZIP IO DATA PK-K6H series support software Ver. 1.02
HK6_2.EXE BUFFALO (known as Melco) HK6 series cache utility diskette (1.44MB)
MCA Riser Card
Two different MCA risers:
- PC730 (6876) riser, 2x PCI & 3x 32-bit MCA, FRU P/N 06H4018
- PC750 (6886) riser, 2x PCI & 5x 32-bit MCA, FRU P/N 06H4023
Uses the 06H5425 PCI-MCA bridge. See also the PC720
riser card.
IDE Controller and Win95
The OPTI Dual PCI IDE Controller may not get properly recognized under
Win95. This symptom observed on some 6885 and 6886 (not on every machine). To
solve this problem you need to rewrite Win95 system registry by following
steps. This instruction was once available in OPTI's web site.
- From Windows 95 click Start
- Click Run
- Type in "regedit"
- Click OK
- Double Click HKEY_LOCAL_MACHINE
- Double Click System
- Double Click CurrentControlSet
- Double Click Services
- Double Click VxD
- Double Click IOS
- Double Click NoIDE 01
- Change the value to 00
- Close regedit
- Restart the system 1) From Start > Run execute with file name
If you get into the trouble at the final stage of installation and Win95
breaks into blue screen and the system can not go further to complete
installation. then choose safe mode operation to do above modification. Hit F8
key to get boot menu so that you can select Safe Mode operation. Once the
system get booted in safe mode, you can apply above mentioned steps. In some
case Win95 may be installed properly without above error. Don't know why.
BIOS may not recognize HD > 4.2GB
If the drive is larger than 4.2GB and it's a 16 Heads logical drive, BIOS
can't recognize it properly. EZDRIVE may help you...
If the drive is a 15 Heads logical drive, then you can use 6GB drive (I
suppose 8 .4G is it's limit but these days there are no such 8G drives with 15
heads). I've used a Seagate 6.4G drive without Seagate Disk Wizard utility.
What to do if wrong BIOS Flash applied
I myself have not examined but it was reported to the news group 2 or 3
years ago.
If you applied wrong BIOS version for 6885 PCI/ISA system on your 6886/6876,
you need a BUS Riser card for 6885. Install PCI/ISA BUS Riser on your 6886 and
once configure it as a PCI/ISA system. Then apply CORRECT BIOS FLASH program
(N2JT50A). Pull out the PCI/ISA Riser and change it to original PCI/MCA riser
card.
Unplug Power Before Removing the HDD Cage
Important: Unplug the AC power cable from AC inlet
connector before removing the HD structure from the box! The system board and
the Riser card are "alive" even if the main power is "OFF" and the AC power
plug is connected to the wall outlet (I mean DC current is supplied always even
though the main power SW pushed off). If the metal structure touches the solder
side of the riser card, the riser will get damaged very easily. So again,
Please Take my Advice. I fried 2 riser cards already (6885 PCI/ISA). After that
I affixed a sheet of vinyl onto side wall of HD structure facing to the solder
side of the riser.
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