From Newsgroup: comp.sys.ibm.ps2.hardware

While pondering the DMA support for PS/2 parallel ports, I decided to
czech each planar ADF and confirm the options for each system...

FBFF 8550
FBFF 50z OK, I could buy this for a dollar...
and the wheels come off...
FBFF 8555SX Type 1

Huh, what? I opened rf5060 and rf5565. FBFF is staring back at me.

How can a 286-10 compare to a 386SX?

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From Newsgroup: comp.sys.ibm.ps2.hardware

Hi Louis !

How can a 286-10 compare to a 386SX?

Architecture wise the 386SX is a 286.
They share the essential external design and most of the surrounding components can be used on either one, like i.e. memory access and control.

The FBFF for either machine may differ in minor settings however.
--
Very friendly greetings from Peter in Germany
http://www.mcamafia.de/
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From Newsgroup: comp.sys.ibm.ps2.hardware

I czeched, the FBFF.ADF for the 5060 refdisk and the 5565 refdisk is
1,489 Bytes.

BUT, there were J files which need to be looked at to determine which sysboard...

Devil's in the details...

Peter H. Wendt wrote:

Hi Louis !

How can a 286-10 compare to a 386SX?

Architecture wise the 386SX is a 286.
They share the essential external design and most of the surrounding components can be used on either one, like i.e. memory access and control.

The FBFF for either machine may differ in minor settings however.

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From Newsgroup: comp.sys.ibm.ps2.hardware

Methinks IBM was too clever by half...Not common to see "Jnnnn.ADF", so
I'm making a big SWAG.

-MAYBE- IBM decided to try using a common Dnnnn and Pnnnn while using
the Jnnnn ADF to actually set up the different features?

What could go wrong?

Compared rf5060 and rf5565

ADF rf5060 rf5565
DFBFF 57/900626 57/900810
JFBFF 271/ " " 271/ " "
PFBFF 1,489/ " " 1,489/ " "
SFBFF 1,210/ " " 1,210/ " "

SC.EXE v 2.04 for both refdisks

Louis Ohland wrote:

I czeched, the FBFF.ADF for the 5060 refdisk and the 5565 refdisk is
1,489 Bytes.

BUT, there were J files which need to be looked at to determine which sysboard...

Devil's in the details...

Peter H. Wendt wrote:

Hi Louis !

How can a 286-10 compare to a 386SX?

Architecture wise the 386SX is a 286.
They share the essential external design and most of the surrounding
components can be used on either one, like i.e. memory access and
control.

The FBFF for either machine may differ in minor settings however.

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From Newsgroup: comp.sys.ibm.ps2.hardware

Hi Louis !

I czeched, the FBFF.ADF for the 5060 refdisk and the 5565 refdisk is
1,489 Bytes.

I can see that. The file describes the basic settings and interfaces.
And they are all the same on the 50Z and 55SX. The only major difference
might be the memory access / cycle time, which is covered in the
additional files. The other 386SX features then needed to be part of the
BIOS -like ie. 32-bit access to bus and memory.
--
Very friendly greetings from Peter in Germany
http://www.mcamafia.de/
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