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computers / comp.sys.ibm.ps2.hardware / Re: CP Codes from DBA ESDI contacts?

CP Codes from DBA ESDI contacts?

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From: ohland@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: CP Codes from DBA ESDI contacts?
Date: Tue, 17 Jan 2023 06:32:00 -0600
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by: Louis Ohland - Tue, 17 Jan 2023 12:32 UTC

Ground Control to MAJ Tom..
Ground Control to MAJ Tom..

After the dalliance with a CP Code reader coming off the reverse of a
Bermuda riser, I was bringing the generators up to speed before phasing
them to the grid. Add coffee. Watched the walls flex.

https://ardent-tool.com/storage/IBM_HD_pinouts.html#IBM_MCA_HDD_DBA

https://ardent-tool.com/docs/pdf/j_mcspec.pdf

Wow. We suck. No link from the 90 planar page to any DBA ESDI pinouts.
Must be them constantly drunk Moravians. Lazy bastards. Long, rambling,
near incoherent longing for the glories of the Red Banner Tractor
Factory #57. slivovice flows freely.

But anyways, what pins are needed, and what's the circuit to produce the
electronification needed to drive the Holy HDLG-2416LED ?

Re: CP Codes from DBA ESDI contacts?

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From: slavotinek@gmail.com (Tomas Slavotinek)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: CP Codes from DBA ESDI contacts?
Date: Fri, 20 Jan 2023 22:22:58 +0100
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by: Tomas Slavotinek - Fri, 20 Jan 2023 21:22 UTC

On 17.01.2023 13:32, Louis Ohland wrote:
> Ground Control to MAJ Tom..
> Ground Control to MAJ Tom..

This is Major Tom to ground control...

> After the dalliance with a CP Code reader coming off the reverse of a
> Bermuda riser, I was bringing the generators up to speed before phasing
> them to the grid. Add coffee. Watched the walls flex.
>
> https://ardent-tool.com/storage/IBM_HD_pinouts.html#IBM_MCA_HDD_DBA
>
> https://ardent-tool.com/docs/pdf/j_mcspec.pdf
>
> Wow. We suck. No link from the 90 planar page to any DBA ESDI pinouts.

Good point. Fixed.

> Must be them constantly drunk Moravians. Lazy bastards. Long, rambling,
> near incoherent longing for the glories of the Red Banner Tractor
> Factory #57. slivovice flows freely.

Toš šak tobě by se ňáká ta slivovica taky zešla, abys přečkal tu drsnů
Wisconsinsků zimu!

> But anyways, what pins are needed, and what's the circuit to produce the
> electronification needed to drive the Holy HDLG-2416LED ?

8 data lines, 16 (?) address lines, and some basic control signals - all
available on the DBA connector. Then you need something to realize the
address decoding (PAL?) and one 245 (normally on the planar). Pretty simple.

Subject	Author
CP Codes from DBA ESDI contacts?	Louis Ohland
Re: CP Codes from DBA ESDI contacts?	Tomas Slavotinek