Board related programs
You can down load BIOS UP
program, Reference/Diag and drivers for Reply products at
There are several planar upgrades
for Mod. 70/80 such as Turbo Board, PowerBoard, Replay OEM planar
( so called ) and such. I got my Reply upgrade planar together
with associated manuals ( original for M80 and
a copy set for M70 ). Both manuals clearly states they are
for " PowerBoard ". So I refer
Mod.80 Replay planar with 4 SIMM slots and Mod.70 planar with
3 SIMM slots as " PowerBoard".
Please refer Louis's
page ( mirrored by William Walsh )
Mod. 70 PowerBoard: Also
page though it is titled as "TurboBoard", the outline is exactly
same with my PowerBoard.
PowerBoard Planar Mod.
J14 VGA Enable/Disable
P1/P2,P4 P7 32bit
AVE 32bit slot
S82078-1B ( L4480900 )
Socket 3 ZIF
U17 IC DESIGNS
U26 OSC 22.118MHz
U58/59 VRAM SEC KM416C256BJ-6
U31 SIMM socket
U39 SIMM socket
U40 SIMM socket
U41 SIMM socket
VGA; 1-2 Enable Planar VGA( CL-GD5434 )
2-3 Disable planar VGA
speed; ON = 25/50/75MHz
OFF = 33/66/100MHz
"The CMOS configuration is cleared by switching the jumper from one
position to the other. The jumper remains in its new position until the
time you decide to clear CMOS."
locates beside 14.318 crystal )
No indication on the PCB but the jumper is same as J15 of M80 P/B.
ON = 25/50/75MHz
OFF = 33/66/100MHz
PassWord ByPass; same as J16 of M80 P/B
M70 P/B has not a
jumper for VGA Enable/Disable setting. It's quite
the planar has only 3 MCA slots.
M70/M80 PowerBoards are capable
to handle DX2-50 to DX4-100, 5x86 and
DX4-100 and Cyrix5x86 can be used without an interposer.
If you want to use
am5x86-133 you need to use an interposer.
I personally feel Cyrix5x86 is the
CPU for these planar.
" 486SX/2-50 *1
486DX/2-66, or 486DX4-100 processors ( standard options
at time of order); along with supports for future OverDrive compatible
*1 is not listed
in M80 manual .
it on the ZIF socket directly and set J15 "speed" jumper unplugged.
you run DOS, Win3.1, Win9x or NT4, you'd better
use appropriate cache programs
to activate L1 cache W/B feature.
using ET586.exe by Evergreen which is contained in et9603.exe
( et9603.exe is
not found at their site this moment. If
you need it, let me know. )
et586.exe setting on my M80 P/B
/CCR2=56 /CCR4=1D /PMR=3 /WBE
You may delete "/PMR=3" and "/WBE" comments.
am5x86 together with a PowerLeap interposer( and some Japanese made interposers).
Am5x86 in 133MHz operation will give higher performance
result under DOS and
Windows95 bench programs than Cyrix5x86.
But I feel Cyrix is faster than am5x86.
PODP or P24T )
on the board. L2 cache problems are reported here and there.
I don't have experienced any trouble with a 126K
L2 cache pulled from PC720
domestic 486 class
hybrid MCA-PCI system ).
I vaguely remember that PowerBoard FAQ in Neo Interactive
said that the board didn't support ATAPI CD-ROM. But actually
I connected a Sony CDU-511 x8 drive on my M70 P/B and installed Win95 with
Max. amount is limited to 64MB. ( and actually
system will not recognize RAM more than 64MB neither Win95
recognize actual RAM beyond 64MB. I don't think himem.sys in
PC-DOS7 will help. )
Onboard CL-GD5434 is a nice chip. You'd better
use additional VRAM's and expand to 2MB.
Performance will be boosted with additional 1MB of
Haven't ever seen a genuine
Reply option for this socket. Socket itself is same with that of
9585 and Lacuna. I have an 126KB L2 module pulled from Japanese system
which is called "L2
SuperCache". It works nicely so far.
P/B and SCSI /A
IBM SPOCK SCSI
I had no remarkable problem with this adapter.
In order to use SPOCK SCSI under Win95,
do not attach any IDE devices off from onboard IDE interface.
F/W SCSI II/A (
Most possibly Corvette may not
be properly configured on the board. So far I haven't ever heard about successful installation.
I failed to use and haven't heard
any success report .
Future Domain MCS700
Not yet tested but maybe OK.
MS-DOS compatibility mode under
System run in MS-DOS compatibility mode even you don't
have IBM SCSI.
Windows95 uses wrong resource
table for HD interface for MCA system.
To solve this problem, go Start>setting>controll pannel> system>device
Then select standard ESDI/HD controller, open properties
and check resource table.
Most possibly configuration #1 with IRQ 15 is
automatically assigned by Win95.
Change the configuration set #1 to #0 which
has IRQ 14, select OK and reboot system.
PowerBoard will run in full featured mode.
OS compatibility other than Windows95
ODPRDX4-100, AMD5x86 and PODP can't
be used together with SPOCK SCSI even if any IDE devices are not connected off from onboard
Change your CPU to a Cyrix5x86 ( x3 model ).
I don't know why but Cyrix solved this problem for me.
Without IBM SPOCK, P/B
can take any of above CPUs .
You'll get trouble if you use am5x86
in x4 speed with x4 capable interposer such as PL586 or Evergreen's one ( I could not even configure
x4 under Win98 ).
CL-GD5434 can be configured properly
for 16 bit color depth in 1024x768 resolution.
TokenRing /A's are OK ( but haven't
tried Streamer family ).
I myself haven't ever tried any OS2
flavors on my M80 PowerBoard. It was told ( among people in MCA forum here ) that Warp4 will crash
But here is a comment from Hakan to
the PS2 News Group.
"I run Warp 4 + FP15 successfully
on several PS/2-80 machines with
each with a Cyrix-586 processor and 64MB of
memory. No problems, they all
work very well. Despite the larger
footprint of Warp 4 over Warp 3, I prefer
the updated Warp 4 UI and
the ability to run the latest code. "
contains cache driver for NT4, et586nt.exe.
Please do not ask me about Linux.
I've seen many defective M70/M80 PowerBoard planar.
Seems like PowerBoard planar are not so well designed as a MCA product. If you get a good one,
you are just *lucky*.
I hope you will get a real Powerboard but not
Up ( 8570 PowerBoard )
You can change the base clock from 33MHz
to 40MHz if you are a good soldering iron man.