Model 8565SX can not get it to boot on SCSI hdd

[Carsten Lyng]

Hi all,

I have got a model 8565sx, and I have some problems
to get it to boot from SCSI Hdd.

I have tried with a IBM SCSI / A adapter, IBM SCSI / A with cache and Future Domain. But I can not get it to boot if the sytem has been configurated with the refdisk.

If the SCSI controller is not configurated, I can boot the machine after the 165 code by pressing the F1 key.

I have made 2 videoes that shows the problem.
Maybe one of you have got an idea to what the problem is ??.

Link to videos.: https://drive.google.com/drive/folders/1OF0xe8fKuOgehublKOl4d95LyHkuttU-?usp=sharing

I have changed the Dallas RTC with a Necroware nwX287 RTC module - could that be the problem ??.

Https://github.com/necroware/nwX287



Regards
Carsten

[Rick Ekblaw]

Carsten Lyng wrote:

> Link to videos.: https://drive.google.com/drive/folders/1OF0xe8fKuOgehublKOl4d95LyHkuttU-?usp=sharing

I get "Access Denied" -- when you set up the sharing, did you select
"Anyone with the link"?

[Carsten Lyng]

Hi Rick,

Sorry, it should work now :-)

/Carsten

[Rick Ekblaw]

Carsten Lyng wrote:

> Sorry, it should work now :-)

Yes, it did. I watched both videos, hoping for a flash of inspiration,
but I've got nothing. If the Necroware nwX287 was the problem, I would
have expected a failure during automatic configuration, and that's not
the case here.

Once it's configured, will the system boot from the refdisk if the SCSI
adapter is removed?

[Louis Ohland]

I see the message about the ADF for the adapter in Slot 8 not being
available.

How did you add the @ ADF, C ADF, and the * DGS files to the refdisk? I
see the 2-8 MB memory adapter, it must recognize the POSIDs, at least...

[Rick Ekblaw]

Do you still have the original Dallas RTC module? If so, you could
attempt the "rotary tool surgery" on it to attach an external coin cell
and see if the system works properly again.

[Pertti Helander]

Do you have an original DBA ESDI HDD in your 65SX and try to add another SCSI HDD and IBM SCSI adapter to it?
Is it possible to remove original ESDI HDD and add only a SCSI HDD with adapter and configure 65SX to boot on it?
I´m going to do so in my 55SX if it is possible.

[Carsten Lyng]

I have copied the Adf files to a new floppy disk and have used " copy an option diskette"
If I then run automatic configuration, the system will not boot after restart.

Then I remove the ADF files for the scsi adapter and then set the configuration without
the configuration the scsi adapter, the system will boot when I press F1 after the 165 error code

I do not have the original Dallas chip, it was missing from the system when I got it.
Maybe I can find another Dallas chip and fit a coin cell battery on it.
And then test with that one to see if it works - how knows, and it is worth testing :-)

[Carsten Lyng]

I have tested with an old Dallas chip with coin cell battery, but I get the same error - No boot
when SCSI adapter is configurated. I have also tested with abother working SCSI drive.

@Pertti, I do not have any old ESDI harddrives or controller, I have only got some different
SCSI drives

[Carsten Lyng]

I got it to work - yeeeha :-)

I changed the Dallas chip ( DS1287) with another one, and fitted a coin cell battery.
Then I ran the the ref disk with automatic configuration and the machine booted nicely up on the
SCSI hdd. The first Dallas chip I used must have been bad.
why I can not use the nwX287 RTC module is beyond my comprehension - perhaps an IBM PS/2 thing ?

[schimmi]

There are two 'versions' of the nwx287 - one with BQ3287 and one with BQ4287 clockchip - the latter with CE signalling for external nvram. https://github.com/necroware/nwX287

[Louis Ohland]

All that Schimmis is not gold...

Stefan, WHICH version is the one needed by the 65SX?

You must... choose wisely...

[schimmi]

Idk, I have both nwx but no 65SX. I could try my 55SX, however. (Also has a DS1287)

If the linked Dallas DS1287 datasheet on the 65SX page is correct, the variant with BQ3285 should be the right one.
Question is, which version Carsten tried.

[Carsten Lyng]

I just had a look under the hood, and the chip is: BENCHMARQ BQ3285LCS
9511-B3