emulatorII-list

----- Original Message -----

From: Adrien

To: emulatorII-list@yahoogroups.com

Sent: Sunday, January 01, 2012 8:37 PM

Subject: RE: [emulatorII-list] Re: No sound, Control Panel unresponsive, Sudden reboots???

Thanks for the explanations. I think it’s not out of topic as trickster may need to do it.

 

I’d be curious to analyse mine. So basically , if I want to run a full test on my emu II, I need :

 

-  ;     A special chip ( where can I find it ? )

 

-       A special debug floppy disk

 

-   ;    Something else, to have the complete package ?  from what you wrote, it seems that there are several softwares, some for the ram, some floppys, etc, and different access like : from the floppy disc way, or from the 25 pin port, with emxp ?  etc, so I’m a bit confused.

 

De : emulatorII-list@yahoogroups.com [mailto:emulatorII-list@yahoogroups.com] De la part de esynthesist
Envoyé : dimanche 1 janvier 2012 12:38
À : emulatorII-list@yahoogroups.com
Objet : [emulatorII-list] Re: No sound, Control Panel unresponsive, Sudden reboots???

 

 

I'm not sure if the EmuSer can be used as a port for a Debug terminal; I would say "yes" but when I have a look at the wiring schema for the debug terminal cable in the EII Service Manual, it is mentioning all kinds of pins on the EII DB25 port which are (imho) not even in use on an RS422 version of the EII anymore.

BTW: the www.emxp.net website does not host the disk image for the Scanner Test. It does however contain a floppy disk image for the Memory Test (on this page: http://www.emxp.net/Additional_downloads.htm)
So if you only want to run a memory test, then you don't really need the Debug Rom. Although the latter is clearly a more profound testing tool - especially if the EII would e.g. not even want to start from a floppy drive.
But if your EII can still read the floppy drive at boot time, the memory test floppy disk will do the job too. If you have an SD HxC connected to your EII, you can simply download the image and copy it to an SD Card. Then boot the EII from the SD HxC, select the image, and the test will start.

///E-Synthesist

--- In emulatorII-list@yahoogroups.com, "Adrien" wrote:
>;
> I have an emuser and emxp : are you saying that it's enough, with this debug
> software, to analyse the emu II ? all the chips and ram inside ?
>
> I went on the site of emxp, through another link that worked, but I can't
> find this debug stuff.
>
>
>
> _____
>
> De : emulatorII-list@yahoogroups.com
> [mailto:emulatorII-list@yahoogroups.com] De la part de Ryan Supak
> Envoyé : samedi 31 décembre 2011 18:38
> À : emulatorII-list@yahoogroups.com
> Objet : Re: [emulatorII-list] No sound, Control Panel unresponsive, Sudden
> reboots???
>
>
>
>
>
> * One more note about getting the DEBUG to run. I had a Windows XP
> tower PC with a COM port laying around. It had a COM port on the back, and I
> found a 9-pin to 25-pin adapter to go to the EII. No soldering was required.
>
> I downloaded PuTTY, followed the exact connectivity instructions from the
> Service Manual, then nothing happened. I hat to hit Return a few times and
> the the DEBUG sprung to life.
>
>
>
> rs
>
>
>
> On Sat, Dec 31, 2011 at 11:30 AM, Ryan Supak wrote:
>
> Firstly, the DEBUG tells you whether or not the EPROM loading circuitry and
> Main CPU circuitry is up and running. The opening message is something like
> "Emulator II, Copyright 1984 E-Mu Systems. The main CPU and EPROM loading
> RAM is functioning correctly (obviously)."
>
> Second, It allows you to run a full RAM test and run RAM diagnostics
> (pushing data into certain addresses, etc). If one of the RAM chips is bad
> then you can easily determine which one by running this test.
>
>
>
> Third, it will do a variety of tests on the disk drives. It will test drive
> compatibility and some level of media compatibility.
>
>
>
> One thing it will notably not do is test keys/buttons/etc... There's a
> floppy-based utility for that. I think it's available on emxp.net.
>
>
>
> rs
>
>
>
>;
>
> On Sat, Dec 31, 2011 at 11:24 AM, Adrien wrote:
>
>
>
> Hi ! i wish you to have your emu II to work again.
>
> Please guys, I heard several times of this debug eprom, and I'm wondering
> what it is exactly : does it indicates which IC isn't working ? if the power
> supply has a problem ? anything else ? I'm quite interested and I'd love to
> know more.
>
>
>
> Something possible , causing your emu II to not work could be the
> electrolytic caps which needs not to dry ( but over the years it get's dry
> and it has to be replaced. You didn't use your emu II for two months, and in
> some guitar amps for example, it can produce some problems sometimes. The
> theorical length of life of these electrolytic caps are sometimes lower than
> 5 years. The emu II is almost 30 years old. Although it's possible to see
> some vintage 60' marshall still working with the original caps.. but most of
> the time, peoples reform these caps, and it's a specific process, and it
> isn't gonna make them brand new anyway.
>
>
>
> Happy New year everyone !
>
>
>
> Adrien
>
>
>
> _____
>
> De : emulatorII-list@yahoogroups.com
> [mailto:emulatorII-list@yahoogroups.com] De la part de Ryan Supak
> Envoyé : samedi 31 décembre 2011 18:07
> À : emulatorII-list@yahoogroups.com
> Objet : Re: [emulatorII-list] No sound, Control Panel unresponsive, Sudden
> reboots???
>
>
>
>
>
> For testing RAM, I've also had very good luck with the Debug EPROM. You can
> download the ROM itself from this site, and if you get to the point where
> you need help getting the Debug to run, post back here. I'll help out in any
> way I can.
>
>
>
> rs
>
> On Sat, Dec 31, 2011 at 2:37 AM, Mike wrote:
>
>
>
> I also would measure the voltages on the PS.
>
>
>
> But I'd suspect faulty RAM.
>
> It may be the ram that runs the operating system.
>
> (I've seen the exact same fault.. EII loads disk then crashes, and it was a
> bad RAM IC)
>
>
>
> It may not be the ram that is bad, but it could be a poor connection.
>
> (ie, reseat ALL the ram)
>
>
>
> The service manual mentions what IC's of RAM run the OS.
>
> And you can swap that bank with the sample RAM freely. (bad sample ram will
> have a distorted sound but the EII will still work)
>
>
>
> Personally, after measuring the PS, I'd just go ahead and gently lift each
> IC up a few mm then press down. Then if that doesn't work, get hold of the
> memory test disk (or if you have HxC, an image of it)
>
>
>
> Mike
>
>
> Sent from my Apple ][e
>
>
> On 31/12/2011, at 12:46 PM, "trickstar303" wrote:
>
>
>
> Hi,
>
> My EII was working fine until today, when I fired her EII up after a pause
> of 2 months. It'll boot the disk just fine and the LCD displays the name of
> the loaded program. But there is no sound at the outputs, the control panel
> is completely unresponsive when any buttons are pushed and it will start to
> reboot randomly.
>
> I opened her up and tried to push all ICs and ribbon cables etc, but it
> didn't help.
>
>; Does anyone know what these symptoms could be?
>
> George
>