PS/55 Model 5570 is the Japanese equivalent of PS/2 Model 80 (8580).
The planar VGA connector is covered by a plastic cap, and PS/55 Display Adapter-II is installed in the AVE slot. All tips for Model 80 (CPU upgrading, planar replacement and memory problems) apply to PS/55 5570 too.
It uses Japanese reference and diagnostic diskettes. 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.
5570 was marketed in Japan and some other countries of Asia. Recently (2002) there was a 5570 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 existence 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 in Australia.
None of the 5570 have bus master issues so they can take SCSI /A without any trouble regardless of the Power Switch color (Red or White).
-Sxx: 386DX-16, 2MB, ESDI, PS/55 Display Adapter (not so sure)
5570-S was the first model of the PS/55 line, and was released in May 1987,
shortly after PS/2 had been announced in US.
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).
According to the system guide issued on Jun.1997, 5570-S0A was specified as follows:
5570-Txx 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 was the fastest model among all 5570, and was a variant of 8580-Axx.
QCONFIG below shows 5570-T with a 486DX Upgrade module from Kingston.
Operating System : IBM PC DOS Version 6.30 Date & Time : 1999-04-10 23:41:38 Model ID : F8 Sub Model ID : 06 BIOS Revision : 00 BIOS Date : 03/15/88 Machine Type : IBM PS/55 Model 5571-T - Compatible Processor : Intel 80486 Estimated Speed : 39.2 Mhz CoProcessor : Integrated Bus Type : Micro Channel 32-Bit Bus Keyboard Type : Enhanced Equipment : 1 Parallel Port(s) : 1 Serial Port(s) : 2 Diskette Drive(s) : 1 Fixed Disk(s) : Math CoProcessor Serial Port 1 : COM1: 03F8 Parallel Port 1 : LPT1: 0378 SCSI Device(s) : Total 1 Unit(s) : Disk 1 Unit(s) Primary Video : VGA Diskette Drive 1 : 3.50" - 1.44M - 80 Track - Type 4 Diskette Drive 2 : 3.50" - 1.44M - 80 Track - Type 4 Fixed Disk 1 : 153 MB = 156672 KB = 160432128 bytes Logical Drive C : Size 153416K = 149.8M Avail 73180K = 71.4M Total Memory : 16000 KB = 15.6 MB Conventional : 640 KB Free: 538 KB Extended Memory : 15360 KB Free: 0 KB Expanded Memory : 15264 KB Free: 14608 KB Page Frame Address: D000 XMS Memory : 14410 KB Free: 14410 KB EMS Version : 4.0 XMS Version : 3.0 VCPI Version : 1.0 Adapter ROM 1 : Addr C0000-C3FFF SCSI Planar : ID FFFC - PS/55 Model 5571-T Total Slots : 8 System (DISK): 2 User Slots: 6 Expansion Slot 1 : * No Adapter Present Expansion Slot 2 : * No Adapter Present Expansion Slot 3 : * No Adapter Present Expansion Slot 4 : ID FCFF - IBM Memory Expansion Adapter 2-8M 80386 Expansion Slot 5 : * No Adapter Present Expansion Slot 6 : ID EFFE - IBM Display Adapter II Expansion Slot 7 : * No Adapter Present Expansion Slot 8 : ID 8EFE - IBM SCSI Adapter
I once tested following upgrades with 5570-T and -V models.
For more detailed information about these upgrade parts, go back to The Tool or check Fred Spencer's pages.