IBM PS/2 Model 55SX
|This is the same in size and
appearance as the model 30 apart from the power switch is
white on this and orange on the model 30. This one works
but it has one major problem, at some time it has had
something pushed into the floppy disk drive and now there
are no heads left just the mounting plates. Unfortunately
the floppy drive is the type that is only connected by a
34 pin ribbon and no power cable so I have not got a
replacement one for it, I did consider swapping the heads
from another one but this has got a single ribbon from
the heads and all the others that I have got have two.
This might be a good opportunity to try direct cable
connection file transfer in case I need to add any files
to it say to set up a printer or what ever.
The hard disk is an IBM WD-380S 80MB 3.5" which connects with a 72 cable ribbon with card edge connectors at each end. This is an ESDI ( Enhanced Small Device Interface ) type hard disk. The ESDI type controller was created in 1983 by the Maxtor Corporation in the USA
This also has an MCA Trantor systems SCSI host adapter fitted this has a 50 pin internal connector and a 25 pin D type external connector, it seems as though it probably had an external CD-ROM fitted at some time as it looks for it every time it boots up.
|This is the riser, the motherboard connector is along the bottom edge, the connector along the top is for the hard drive, then there are 3 x 16 bit Micro Channel slots (MCA) the bottom on is longer as it incorporates the video extension interface that allows the addition of an advanced video graphics board such as the IBM 8514/A in order to upgrade video function without duplicating the built-in VGA circuitry. On the right side is the black block is the connector for the speaker.|
IBM PS/2 55SX Type 8555
|Motherboard Bar code no.||55X36194KFT 92F0623 155|
|CPU Intel NG80386SX - 16|
|3968 KB RAM||1 x 72 pin SIMM 68X6343 B||82F8221 053|
|Dallas Clock chip||DS1287|
|Riser 64F0809/EC01646/1102||B/C 55 X08 119097|
|FDD 3.5" 1.44MB Alps||DFP723D30A||Bar Code L1P 70081571|
|34-pin connector & no power lead||P/N 72X6112||EC NO.844421|
|HDD IBM 80MB||Model No. WD - 380S||Bar Code B1RM4121625|
|P/N 79F4013||MLC C81004||FRU 56F8892|
|Connected with a 72 pin PCB connector cable|
|Power supply||Model no. AA15992||90W max.|
|IBM P/N 33F8138||GBM No 27F4920||EC No.C01278|
1 Card Trantor systems Ltd.
FCC ID IE8T228
SCSI Host adapter card with 1 internal & 1 external port.
MS Word 2.0
Please e-mail me if you have further information or any criticism of the details shown
Last Updated 13th September 2002