Looking at the PSU edge connector again...

The top row, left to right:
-one signal pin (low current)
-6 power pins; +12 V, based on the bodge
-17 power pins; +5V no doubt
-another signal pin

The thick trace right below gives us some idea about the pins on the
solder side - all possibly connected together (ground), with the
exception of the rightmost pin (see the vias).

Does that sound familiar?

https://ardent-tool.com/50_70/Power.html

Yep, looks like the pinout may be a copypasta as well (needs
confirmation before any action ♪).

Btw, the connector drawing on the page above seems to be off by one pin
(the +12/+5 V split. I'll fix that too...

On 21.12.2021 22:02, schimmi wrote:
> Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 21:59:40 UTC+1:
>> That will be the reason then. One bad socket and you lose the entire
>> bank - four sockets for a 32-bit system. From my experience, it's rather
>> difficult to get it working reliably with one latch broken. You have to
>> get creative and add some kind of support or better replace the entire
>> socket.
>>
>> Or, you know, use a memory expansion adapter... :)
>> On 21.12.2021 21:50, schimmi wrote:
>>> Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 21:45:32 UTC+1:
>>>> I meant the SIMM sockets there (as an answer to Louis' question). Only
>>>> the cheapest ones are all-plastic, most have either metal support around
>>>> the release clips or all-metal latches (but some of these tend to break
>>>> as well).
>>>> On 21.12.2021 21:36, schimmi wrote:
>>>>> Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 21:14:25 UTC+1:
>>>>>> Hard to tell from the grainy photos but one of the release levers on the
>>>>>> left side looks somewhat mangled (4th slot from the top). Are these the
>>>>>> nasty all-plastic sockets?
>>>>>> On 16.12.2021 21:50, schimmi wrote:
>>>>>>> Leads to the question, why the free onboard-RAM slots were not utilised first.
>>>>>>> ¯\_(ツ)_/¯
>>>>> Are there any other sockets than plastic ones? They seem to be fine :) https://photos.app.goo.gl/tabwnRspu6oHbqGh7
>>> Ah, the RAM-Slots. Yeah, turn into the cheap street. And yes, the 4th slot is indeed broken.
> it's just the holder, nothing, that cant't be fixed :) just added a main pcb photo, feel free to find more issues :D

On 21.12.2021 23:19, schimmi wrote:
> No problem :) Hopefully, https://feb-d.de/ can help me out with the software. We'll see :) Next step is to annoy the french bull-society :D
> The copro-socket in the socket is indeed some kind of a bus-terminator or adapter?
> Thought exactly the same about the bodge-wire near the PS. Too much current for that trace.
> RTC - good question. found out how to remove the battery compartment - took another photo without it. maybe you can spot the rtc now?
> However, better photos/infos are coming.

Thanks. Yep, Z75 should be it. Hard to read what the package says, but I
can see the Motorola logo and it ends with 818A. So, probably Motorola
MC146818A. THe same part was used in many early PS/2s, including Models
50 and 70.

Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 23:34:09 UTC+1:
> On 21.12.2021 23:19, schimmi wrote:
> > No problem :) Hopefully, https://feb-d.de/ can help me out with the software. We'll see :) Next step is to annoy the french bull-society :D
> > The copro-socket in the socket is indeed some kind of a bus-terminator or adapter?
> > Thought exactly the same about the bodge-wire near the PS. Too much current for that trace.
> > RTC - good question. found out how to remove the battery compartment - took another photo without it. maybe you can spot the rtc now?
> > However, better photos/infos are coming.
> Thanks. Yep, Z75 should be it. Hard to read what the package says, but I
> can see the Motorola logo and it ends with 818A. So, probably Motorola
> MC146818A. THe same part was used in many early PS/2s, including Models
> 50 and 70.
just uploaded the pinout. it's indeed quitre the same and form antec.

What I've meant was ASTEC :) Pinout -> https://photos.app.goo.gl/tabwnRspu6oHbqGh7

Ah, that confirms that part. Neat...

If you don't plan on removing the planar later, could you please take
one more photo of the planar with the fan assembly removed? That should
give me a good enough reference for the outline.

Also, there are pads and outline for a switch in bottom right (SW1).
Maybe a reset button?

On 21.12.2021 23:37, schimmi wrote:
> Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 23:34:09 UTC+1:
>> On 21.12.2021 23:19, schimmi wrote:
>>> No problem :) Hopefully, https://feb-d.de/ can help me out with the software. We'll see :) Next step is to annoy the french bull-society :D
>>> The copro-socket in the socket is indeed some kind of a bus-terminator or adapter?
>>> Thought exactly the same about the bodge-wire near the PS. Too much current for that trace.
>>> RTC - good question. found out how to remove the battery compartment - took another photo without it. maybe you can spot the rtc now?
>>> However, better photos/infos are coming.
>> Thanks. Yep, Z75 should be it. Hard to read what the package says, but I
>> can see the Motorola logo and it ends with 818A. So, probably Motorola
>> MC146818A. THe same part was used in many early PS/2s, including Models
>> 50 and 70.
> just uploaded the pinout. it's indeed quitre the same and form antec.

Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 23:57:15 UTC+1:
> Ah, that confirms that part. Neat...
>
> If you don't plan on removing the planar later, could you please take
> one more photo of the planar with the fan assembly removed? That should
> give me a good enough reference for the outline.
>
> Also, there are pads and outline for a switch in bottom right (SW1).
> Maybe a reset button?
>
> On 21.12.2021 23:37, schimmi wrote:
> > Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 23:34:09 UTC+1:
> >> On 21.12.2021 23:19, schimmi wrote:
> >>> No problem :) Hopefully, https://feb-d.de/ can help me out with the software. We'll see :) Next step is to annoy the french bull-society :D
> >>> The copro-socket in the socket is indeed some kind of a bus-terminator or adapter?
> >>> Thought exactly the same about the bodge-wire near the PS. Too much current for that trace.
> >>> RTC - good question. found out how to remove the battery compartment - took another photo without it. maybe you can spot the rtc now?
> >>> However, better photos/infos are coming.
> >> Thanks. Yep, Z75 should be it. Hard to read what the package says, but I
> >> can see the Motorola logo and it ends with 818A. So, probably Motorola
> >> MC146818A. THe same part was used in many early PS/2s, including Models
> >> 50 and 70.
> > just uploaded the pinout. it's indeed quitre the same and form antec.
Of course I take everything apart and send every bit to you. Be prepared for some High-Res Photos. Just hooked it up on my Testbench - HDD spins right up but as we already pointed out - there is no boot from any device due to missing config parameters. At least there is a nice Bootscreen with way more info you'll see on any PS/2 :) Good point btw. taking the focus to the HDD - I'll hook it up to another machine and take a look at the contents. Hopefully, there is something to configure this Blackbox :)

Fantastic, thank you and good luck!

I'm gonna call it a night...

On 22.12.2021 1:37, schimmi wrote:
> Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 23:57:15 UTC+1:
>> Ah, that confirms that part. Neat...
>>
>> If you don't plan on removing the planar later, could you please take
>> one more photo of the planar with the fan assembly removed? That should
>> give me a good enough reference for the outline.
>>
>> Also, there are pads and outline for a switch in bottom right (SW1).
>> Maybe a reset button?
>>
>> On 21.12.2021 23:37, schimmi wrote:
>>> Tomas Slavotinek schrieb am Dienstag, 21. Dezember 2021 um 23:34:09 UTC+1:
>>>> On 21.12.2021 23:19, schimmi wrote:
>>>>> No problem :) Hopefully, https://feb-d.de/ can help me out with the software. We'll see :) Next step is to annoy the french bull-society :D
>>>>> The copro-socket in the socket is indeed some kind of a bus-terminator or adapter?
>>>>> Thought exactly the same about the bodge-wire near the PS. Too much current for that trace.
>>>>> RTC - good question. found out how to remove the battery compartment - took another photo without it. maybe you can spot the rtc now?
>>>>> However, better photos/infos are coming.
>>>> Thanks. Yep, Z75 should be it. Hard to read what the package says, but I
>>>> can see the Motorola logo and it ends with 818A. So, probably Motorola
>>>> MC146818A. THe same part was used in many early PS/2s, including Models
>>>> 50 and 70.
>>> just uploaded the pinout. it's indeed quitre the same and form antec.
> Of course I take everything apart and send every bit to you. Be prepared for some High-Res Photos. Just hooked it up on my Testbench - HDD spins right up but as we already pointed out - there is no boot from any device due to missing config parameters. At least there is a nice Bootscreen with way more info you'll see on any PS/2 :) Good point btw. taking the focus to the HDD - I'll hook it up to another machine and take a look at the contents. Hopefully, there is something to configure this Blackbox :)

Huh, pads for a ZIP socket,

That 387 socket is interesting. 486 upgrades for 386 used a
compatibility plug at times.

IBM had clips for broken plastic SIMM clips.

8 low capacity DRAM for VGA-ish video?

Higher res would be fascinating.

On 12/21/2021 16:52, schimmi wrote:
> What I've meant was ASTEC :) Pinout -> https://photos.app.goo.gl/tabwnRspu6oHbqGh7

Am 21.12.21 um 22:25 schrieb schimmi:
> Guess, the WD1007V-MC1 is already documented. I'll try my best to throw you everything in high-res over the fence. Thanks by the way for documenting all of this :)
>

Hi Stefan,

yep, there is some documentation.

WD1007-MC1:
http://www.franken-online.de/ymmv/esdi/manufac.html#Western%20Digital
http://www.franken-online.de/ymmv/esdi/resources.html#WD

The controller works with standard @ddff.adf. I used the ADF file stored
here:
http://www.franken-online.de/ymmv/files/WD_UTIL.7z

Control Data SWIFT 94316-200 aka Seagate ST1201E
http://computermuseum.informatik.uni-stuttgart.de/pcdisk/h/1000/237.htm
http://computermuseum.informatik.uni-stuttgart.de/pcdisk/h/4000/3899.htm

A nice and relative fast ESDI storage system.

The WD1007 writes a specific format to the hard drive. Unfortunately it
is not possible to read the hard disk contents with another ESDI
controller card, not even with a WD1007x ISA ESDI controller.

If you have a working model 60, 70 or 80 it may be possible to check the
hard disk's content with DOS and find the setup programs.

Wolfgang

Wolfgang Gehl schrieb am Mittwoch, 22. Dezember 2021 um 22:07:01 UTC+1:
> Am 21.12.21 um 22:25 schrieb schimmi:
> > Guess, the WD1007V-MC1 is already documented. I'll try my best to throw you everything in high-res over the fence. Thanks by the way for documenting all of this :)
> >
> Hi Stefan,
>
> yep, there is some documentation.
>
> WD1007-MC1:
> http://www.franken-online.de/ymmv/esdi/manufac.html#Western%20Digital
> http://www.franken-online.de/ymmv/esdi/resources.html#WD
>
> The controller works with standard @ddff.adf. I used the ADF file stored
> here:
> http://www.franken-online.de/ymmv/files/WD_UTIL.7z
>
> Control Data SWIFT 94316-200 aka Seagate ST1201E
> http://computermuseum.informatik.uni-stuttgart.de/pcdisk/h/1000/237.htm
> http://computermuseum.informatik.uni-stuttgart.de/pcdisk/h/4000/3899.htm
>
> A nice and relative fast ESDI storage system.
>
> The WD1007 writes a specific format to the hard drive. Unfortunately it
> is not possible to read the hard disk contents with another ESDI
> controller card, not even with a WD1007x ISA ESDI controller.
>
> If you have a working model 60, 70 or 80 it may be possible to check the
> hard disk's content with DOS and find the setup programs.
>
> Wolfgang

Hi Wolfgang,
thank you for the info, I didn't know that. So i'll try my Model 70 with the original controller + HDD.
Hopefully, there is something worth mentioning on the disk.

In the meantime, I've contacted the feb-d.de society and even got a positive response :)

Regards,
Stefan

Louis Ohland schrieb am Mittwoch, 22. Dezember 2021 um 02:47:24 UTC+1:
> Huh, pads for a ZIP socket,
>
> That 387 socket is interesting. 486 upgrades for 386 used a
> compatibility plug at times.
>
> IBM had clips for broken plastic SIMM clips.
>
> 8 low capacity DRAM for VGA-ish video?
>
> Higher res would be fascinating.
> On 12/21/2021 16:52, schimmi wrote:
> > What I've meant was ASTEC :) Pinout -> https://photos.app.goo.gl/tabwnRspu6oHbqGh7
It really looks like a VRAM Upgrade Option, you're right. Onboard are whopping 64K X 4 BIT times 8 (KM41464AJ), so 256KiB VRAM.
The 387 insert is indeed strange, mabye it's just for bus terminaton, if no 387 is plugged in?
High-Res is in the works :)

Wolfgang Gehl schrieb am Mittwoch, 22. Dezember 2021 um 22:07:01 UTC+1:
> Am 21.12.21 um 22:25 schrieb schimmi:
> > Guess, the WD1007V-MC1 is already documented. I'll try my best to throw you everything in high-res over the fence. Thanks by the way for documenting all of this :)
> >
> Hi Stefan,
>
> yep, there is some documentation.
>
> WD1007-MC1:
> http://www.franken-online.de/ymmv/esdi/manufac.html#Western%20Digital
> http://www.franken-online.de/ymmv/esdi/resources.html#WD
>
> The controller works with standard @ddff.adf. I used the ADF file stored
> here:
> http://www.franken-online.de/ymmv/files/WD_UTIL.7z
>
> Control Data SWIFT 94316-200 aka Seagate ST1201E
> http://computermuseum.informatik.uni-stuttgart.de/pcdisk/h/1000/237.htm
> http://computermuseum.informatik.uni-stuttgart.de/pcdisk/h/4000/3899.htm
>
> A nice and relative fast ESDI storage system.
>
> The WD1007 writes a specific format to the hard drive. Unfortunately it
> is not possible to read the hard disk contents with another ESDI
> controller card, not even with a WD1007x ISA ESDI controller.
>
> If you have a working model 60, 70 or 80 it may be possible to check the
> hard disk's content with DOS and find the setup programs.
>
> Wolfgang
Hi Wolfgang,
I hooked up the ESDI Drive + Controller in my M70 and all went fine - however, there was only a basic DOS installation and a typewriter learning program an the disk. No Signs of a config utility :(

You mentioned:
> A nice and relative fast ESDI storage system.
I can agree with that. Not a single failing sector, no problem at all with the controller :)

Thanks again,
Stefan