Altos ACS 8000-7 (8200) mainboard wanted / Shugart 4008 motor pulley

[wulfman]

heh  thats way more work than a plug in emulator

good luck on it


On 7/11/2015 2:49 PM, Jay Jaeger wrote:
> Oh, yeah I get it - an in circuit emulator.  With my logic analyzer I
> can also watch all the bus transactions (or directly on the CPU if needs
> be) to see what is going on, as well.
>
> I have an Intel MDS IV with an ICE for (IIRC) an 8051, but have never
> used it for that purpose to date.
>
> JRJ
>
> On 7/11/2015 2:42 PM, wulfman wrote:
>> no not a software emulator  a hardware emulator you remove the Z80 and
>> plug in a cable
>> lets you step through the code test memory and run the board at full speed
>> hardware emulators are for the debugging of the hardware.
>>
>> unlike software emulators that run on a host PC that let you run old
>> software
>>
>> i have a ZAX Z80 emulator and a Applied microsystems Z80 emulator for
>> just that purpose
>>
>> On 7/11/2015 8:32 AM, Jay Jaeger wrote:
>>> I use emulators as well, and have written some, but I also enjoy working
>>> with the real hardware.
>>>
>>> The Altos ACS-8000 series are all Z80's .
>>>
>>> JRJ
>>>
>>> On 7/10/2015 10:05 PM, wulfman wrote:
>>>> On 7/10/2015 7:50 PM, Jay Jaeger wrote:
>>>>> Long story, but....
>>>>>
>>>>> I recently acquired an Altos ACS 8000-2 with an 8100-01 mainboard (which
>>>>> currently is not functioning).   Acquired it on eBay where it was
>>>>> represented as an ACS-8000-7, along with an Altos 8000-7A 29MB hard disk
>>>>> (a Shugart 4008).  The hard disk was fine, but the computer wasn't the
>>>>> one shown in the photo.  (I arranged for a partial refund.  At least the
>>>>> disk was the one in the photo.  ;) ).
>>>>>
>>>>> I was wondering if anyone had an 8200 mainboard (the one with the logic
>>>>> for the hard disk on it) that they would be willing to sell at an
>>>>> affordable price?
>>>>>
>>>>> Also, I have a second Shugart 4008 hard disk, but it was configured for
>>>>> 50Hz - so the motor pulley is the wrong size.  Anyone out there have a
>>>>> dead 4008 that they would be willing to have part with its motor pulley
>>>>> and belt (and get the 50Hz set in return)?  (For example, I saw a
>>>>> posting on youtube with a wobbly platter set that probably is a good
>>>>> candidate...  ;) ).
>>>>>
>>>>> Any tips on troubleshooting the mainboard on a double density Altos 8000
>>>>> computer (mainboard 8100) would also be appreciated.  I have already
>>>>> reseated the chips, polished the tarnish off some chips the apparently
>>>>> had silver-plated pins, etc., to no avail.  Have dumped the ROM (2708).
>>>>>  Next plan is to disassemble that, and slap a logic analyzer on "J2"
>>>>> which has all of the bus signals on it.
>>>>>
>>>>> Thanks in advance...
>>>>>
>>>>> JRJ
>>>>>
>>>> This is why i collect cpu emulators. I have almost every kind made. I do
>>>> however need some jumper headers for a 68000 HMI unit
>>>> thats set for 68008 mode but thats another story.
>>>>
>>>>
>>>> what main CPU does this use, 8080 or a Z80 or ???
>>>>
>>>>
>>>>
>>


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