IBM 8-Inch unknown System

[MauriceH]

Have required some org IBM 8 Inch FFD's.
But what system could that be from?
With ANADISK I can't read the contend.
Mostly I can read the sectors and figure out what system those are from.
But these only random characters are shown sadly.
1 sect is 26x128, rest is 8x1024 dual side.

Label is 1983 and 1984 with "SYS.NBR SE5EH"

Any one an idea of the type of system?
See photo's

 

[Chuck(G)]

My guess would be an IBM System 36.

 

[maxtherabbit]

Didn't IBM use EBCDIC or whatever on these systems?

 

[NeXT]

Yes, if this is from an S/36 or any IBM midrange from that time period it will be using EBCDIC, not ASCII.

 

[Chuck(G)]

I've got a couple of (used) magazines from a System 36--don't even count on much EBCDIC--a lot of the data tends to be application-specific.

 

[Al Kossow]

IBM program IDs of 5726 are for System/34 5727 for System/36
they are double-density EBCDIC disks
The volume table of contents will be on the first track

 

[MauriceH]

IBM program IDs of 5726 are for System/34 5727 for System/36
they are double-density EBCDIC disks
The volume table of contents will be on the first track

Thanks for the info,
i'LL go imagedisk those IBM FFDs.
attached 2 FFD of those single side 8x512 BASIC images.

So could there be a software conversion to read in those disks?
I mean a ABCDIC to ascii?

Some disks seems first track 11x128 and rest is single side 8x512B
Prog: **5726RG1 R.09 L.00
F/C: 9043 BASIC N ORDER
TITLE: RPG II
ID: VOL RPGRPG OWN
001/002 REF DOC 020123

 

[MauriceH]

Yes Indeed its a EBCDIC code on those disks.
Found a IBM EBCDIC to Ascii tabel on the internet. IBM.COM website
From a disk I looked at the HEX code and figured out some sequence and transferred some code.
That did make some logic words.

See attached picture for some words I decode from a disk.
Lets see on some other disks I can find some text and figure out what system it was used at.

 

[bear]

There's no need to look at the text to figure it out, 5727-SS1 is the program ID of the operating system (SSP) for System/36 on 8" floppy. The other program IDs on the other disks already tell you what they are.

 

[MauriceH]

Yess found it.
On disk VOL. PPTXT, prog. 5727wp1 (8x1024B disk)

Indeed IBM SYSTEM 36, found info on Cyl 0

8x1024 disk​	HEX:​
​	​
ERMAP​	C5 D9 D4 C1 D7​
VOL PPTXT​	E5 D6 D3 F1 D7 D7 E3 E7 E3 4040​
IBMSYSTEM36​	C9 C2 D4 E2 E8 E2 E3 C5 D4 F3 F6 40 40​
WP1R5​	E6 D7 F1 D9 F5​
​	​
​	C8 C4 D9 F1 40 E3 E7 E3 40 40​
IBMSYSTEM36​	C9 C2 D4 E2 E8 E2 E3 C5 D4 F3 F6 40 40​

 

[Chuck(G)]

Nice knowing that my guess was bang on! There are actually 26 sectors of 128 bytes on the first track. The reason that you don't see all of them is because some have deleted data marks on them. One of the holdovers from 3740 data entry stations.

 

[maxtherabbit]

Nice knowing that my guess was bang on! There are actually 26 sectors of 128 bytes on the first track. The reason that you don't see all of them is because some have deleted data marks on them. One of the holdovers from 3740 data entry stations.

My factory formatted SSSD 8" disks are like that as well

 

[Alsilisk]

If you want to make useful dumps, do not convert them to ASCII. It is a one way process. So great for looking at but useless if someone else wants to use them on a machine that uses EBCIDIC. If you are going to stick them somewhere for someone else, please provide dumps in both EBCIDIC and ASCII.