Parent

IBM 5170 Fixed Disk and Diskette Drive Adapter -
Jumper Information


First generation
Second generation
Notes
Of Interest



First generation


Jumper Photo    Settings
E1 / E2 / E3 5170_hard_floppy_controller_jumper_1g_123.png  Option 1:  Jumper E2 to E3.  Floppy controller portion of adapter at primary address range starting 3F0h     <-------- DEFAULT SETTING

 Option 2:  Jumper E1 to E2.  Floppy controller portion of adapter at secondary address range starting 370h

     Note:  Removing the jumper does not disable the floppy controller portion.
E4 / E5 / E6 5170_hard_floppy_controller_jumper_1g_456.png  Option 1:  Jumper E5 to E6.  Hard disk controller portion of adapter at primary address range starting 1F0h     <-------- DEFAULT SETTING

 Option 2:  Jumper E4 to E5.  Hard disk controller portion of adapter at secondary address range starting 170h

     Note:  Removing the jumper does not disable the hard disk controller portion.
E7 / E8    Factory jumper - do not remove.
E11 / E12    Factory jumper - do not remove.




Second generation


Jumper Photo    Settings
E1 / E2 / E3 5170_hard_floppy_controller_jumper_2g_123.png  Option 1:  Jumper E2 to E3.  Floppy controller portion of adapter at primary address range starting 3F0h     <-------- DEFAULT SETTING

 Option 2:  Jumper E1 to E2.  Floppy controller portion of adapter at secondary address range starting 370h

     Note:  Removing the jumper does not disable the floppy controller portion.
E4 / E5 / E6 5170_hard_floppy_controller_jumper_2g_456.png  Option 1:  Jumper E5 to E6.  Hard disk controller portion of adapter at primary address range starting 1F0h     <-------- DEFAULT SETTING

 Option 2:  Jumper E4 to E5.  Hard disk controller portion of adapter at secondary address range starting 170h

     Note:  Removing the jumper does not disable the hard disk controller portion.




Notes

The IBM BIOS on the 5170 motherboard is programmed expecting the floppy controller portion and hard disk controller portion of the adapter to be at the primary addresses.

On the adapter, selecting the secondary address range for the floppy controller portion will make that portion 'invisible' to the IBM 5170 BIOS.  The portion is still there, but the IBM 5170 BIOS will not look for it at the secondary address range.  Similar thing for the hard disk controller portion.



Of Interest

The following symptom happens when the hard disk controller portion of the adapter, first or second generation adapter, is changed to the secondary address range.
For that reason, very few people will experience it.

Symptom

Basically, you cannot boot from a floppy.
The sequence is:

1. Insert a boot floppy.
2. Power on 5170.
3. If the 5170's SETUP configuration is still configured for a hard drive, you will see a 1782 error (expected because no HDD controller at the primary address) - press F1 key.
4. Some floppy drive activity.
5. You will see a 601 error.
6. Boots to BASIC.

Comment

It is interesting that changing a jumper for the hard drive functionality of the adapter affects the floppy drive functionality.

It is not a case of getting the jumpers confused, because changing the floppy jumper results in no floppy drive activity whatsoever.

Investigation

Seen with 06/10/85 and 11/15/85 revisions of BIOS, but not with the 01/10/84 revision.

This problem is the 'Known problem - POST error of 601' issue described at here.