This section may never be completed forever. I don't have enough
information about 5570-S and T models.
All models of 5570 does not have BUS master issue so that 5570 can
take SCSI /A without any trouble regardless of the color ( Red or White ) of Power Switch Lever.
Model 5570 ( -S09/S19/S0A/S1A/T09/T19/T1A/T0A/T0B/T0C/V0B/V0C/V1A/V1B/V1C
-Sxx ; 386DX-16,
2MB, ESDI, PS/55 Display Adapter ( not
so sure )
-Txx ; 386DX-20, 4MB, ESDI, PS/55 Display
-V0x ; 386DX-25, 4MB, ESDI, PS/55 Display
-V1x ; 386DX-25, 4MB, SCSI, PS/55 Display
5570-Sxx ( 16MHz
5570-S was the first model of PS/55 line which
was released in MAY 1987 shortly after PS/2 had been announced in US .
DOS used for this model was called IBM KDOS 3.30.
KDOS was originally used for IBM Japan's proprietary systems called
"Multistation 5550". For detailed information about Multistation family,
please click here.
5570-S was not usually included in the system
compatibility list for some latest MCA options and softwares
while 5570-T/V are listed. I suspect it is related to the Display
Adapter -I which was designed for KDOS 3.3x.
The Stock Video Adapter ( though it was provided as an Option ) is consisted
with three PCBs and requires two MCA slots ( one is AVE 16bit and the other is usual 16bit slot ).
Got advised about 5570-S.
According to the system
guide issued on Jun.1997, 5570-S0A was specified as follows.
||2MB ( Max 16MB, 4MB max on the planar
||70MB ( Max 140MB
||2HD x 2drives
x3, 16bit x2 ( most possibly 3slots are occupied with an ESDI /A
and a Display adapter which
required 2 slots. )
RS-232C ( Max support up to 9 ports)
| System Security
||CMOS memory for password
| Display adapter
||Should be loaded in
designated MCA slot. ( Not included . sold as an option )
| Kanji-Font ROM
||7190 characters JIS Level
1 and Level 2
||2MB ! ( for 4 screens.)
I don't know what it means.
| OS Supports
|| KDOS 3.3,
| System unit
JY 1,497,000 !!! as usual...
| 2MB system board memory kit
| 70MB Hard Drive
| Display Adapter /A
JY 320,000 Wow ! would like to see this one.
| 5574 C-02 16" color display
| 5576 001 KeyBoard
| 5576 G02 Printer
5570-Txx ( 20MHz ) was
equipped with Display Adapter-II and the newer version of DOS,
DOS J4.0. This model might be same with 8580-1xx except the BIOS.
5570-Vxx ( 25MHz
) was the fastest model among all 5570, and was a variant
-V1x model was equipped with non cached
SCSI /A and SCSI HD along with a metal drive cage in which 2x
3.25" drives can be attached.
5570 is analogous to PS/2
8580. It uses Japanese reference and diagnostic
VGA connector on the planar is covered
by a plastic lid, and instead, PS/55 Display Adapter-II is loaded
on the AVE slot. All tips for Mod.80 ( CPU upgrading, planar replacement
and memory problems) would commonly apply to PS/55 5570.
Reference diskettes Ver.1.3x and lower are basically
system specific ( I myself have not tested ) and based on JDOS ( KDOS3.3 for Ver.1.0 and Ver 1.15 ).
Reference disks Ver.1.40 and higher are based
on DOS/V and these diskettes are labeled as "Reference diskette/V".
Reference Ver. 1.50 covers most of all 386 class models such as 5550-S/T/V,
5570-T/V, 5540-T, 5545, 5530-S/T.
As I wrote that 5570-S was equipped with
KDOS, I suppose a stock 5570-S with original Display Adapter can't handle
DOS/V based reference.
Basically 5570 was marketted inside Japan and some
Asia countries. Recently 5570 was up on eBay AU ( reported
by Lee ). I suppose the beast was 5570-T or V because it's main power
switch was white.
Until I saw the eBay auction, I felt strange
about the existance of English version of the reference diskette.
Maybe some of 5570 were exported to Australia.
Funny enough that most of 85xx and 95xx sold in Japan were made of Australia. .....2002.11.02
QCONFIG below shows 5570-T with a 486DX Upgrade
module from Kingston.
System : IBM PC DOS Version 6.30
Date & Time
: 1999-04-10 23:41:38
Sub Model ID : 06
BIOS Date : 03/15/88
: IBM PS/55 Model 5571-T - Compatible
: Intel 80486
: 39.2 Mhz
: Micro Channel 32-Bit Bus
:1 Parallel Port(s)
:1 Serial Port(s)
:2 Diskette Drive(s)
:1 Fixed Disk(s)
: Math CoProcessor
Serial Port 1
: COM1: 03F8
1 : LPT1: 0378
: Total 1 Unit(s)
: Disk 1 Unit(s)
1 : 3.50" - 1.44M - 80 Track - Type 4
2 : 3.50" - 1.44M - 80 Track - Type 4
Fixed Disk 1
: 153 MB = 156672 KB = 160432128 bytes
C : Size 153416K = 149.8M Avail
73180K = 71.4M
: 16000 KB = 15.6 MB
: 640 KB Free: 538 KB
: 15360 KB Free: 0 KB
: 15264 KB Free: 14608 KB Page Frame Address: D000
: 14410 KB Free: 14410 KB
Adapter ROM 1
: Addr C0000-C3FFF SCSI
: ID FFFC - PS/55 Model 5571-T
: 8 System (DISK): 2 User Slots: 6
1 : * No Adapter Present
2 : * No Adapter Present
3 : * No Adapter Present
4 : ID FCFF - IBM Memory Expansion Adapter
5 : * No Adapter Present
6 : ID EFFE - IBM Display Adapter II
7 : * No Adapter Present
8 : ID 8EFE - IBM SCSI Adapter
I once tested following upgrades with
5570-T and -V models.
REV to 486 ( IBM486BLC3-75 ).
| Very easy to use, just
plug the module onto original PGA socket then install cache control
program to get x3 ( or x2 ) operation properly.
| It's little bit difficult
to use comparing to REV to 486.
With this board you
can use additional 64MB of RAM. ( I tested 8MB on the planar and
16MB x2 on the adapter .)
If you don't care to keep next slot vacant, you can use a 5x86
CPU with an interposer. I once used a Cyrix5x86-120( 3x 33MHz,
at 99MHz rated inner speed ).
I'm not sure about Kingston's
Lightning 486 upgrade with IBM486DLC2-66. Probably you can
use this CPU upgrade. It was reported that 66MHZ OSC on this board
could be changed to 100MHz OSC. The reporter used his over clocked
module on his 20MHz desktop box ( 5530-T ).
Now I have Mod. 80 PowerBoard in my box.
For more detailed information about these upgrade parts, go for
web site. or Fred
PS/55 Index Page