@Fred_AROS

Yes, i know, thats why i think you will have to repair it, if possible ofcourse.

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A1G3-SE + OS4.1 u1 iso (x2)

@Fred_AROS

9600-115200 (depending on your settings in UBoot or UBoot's default ones) 8N1 no handshaking.

_________________
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@Tomppeli

Thx, will test that

@Tomppeli

It's 115200.

Thx for all the replies but I think I'm stuck .... there's no serial output at all, so I guess it's not only the Radeon chip

I tested all the bitrates down to 9600 with no luck, so I'm now out of ideas where to look

@Fred_AROS


You should get even a garbled output if you have the wrong baud rate.

Does anything happen with your PS/2 keyboards led lights when you power on ?

Quote:

Fred_AROS wrote: Thx for all the replies but I think I'm stuck .... there's no serial output at all, so I guess it's not only the Radeon chip I tested all the bitrates down to 9600 with no luck, so I'm now out of ideas where to look

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Sam460ex 1.15Ghz, 2GB.Radeon HD6670 . Apex TM-302-3 Case

@Fred_AROS

Your A1200 might have an hard time to reach a baudrate of 115200 if you're using the original serial.device so you might get better luck with some of the other serial devices. So if you're unsure if you'r A1200 can do 115200 it might be worth it to test some of the replacement devices. I remember that my A1200 couldn't do it +10 years ago with the original device. I had Blizz030@50mhz, Apollo1240@40 or Blizzardppc 040/25 back then

@Spectre660

No LED action on Keyboard

@smf

Using 8n1.device from Aminet .... no Problem getting 115.200 Baud here

@Fred_AROS

Having not owned a next gen Amiga I should probably not join the discussion but I can't stop my self asking for the obvious: Does the µA1 have a reset-button / jumper on the motherboard to put it back to factory settings? Once I had a first series iMac with a battery gone bad. After replacing it the machine misbehaved rather badly. This could only be fixed by doing a reset of the flash-memory.

Ah well.. probably you've already tried something in the lines of this story.

Anyway... I hope you'll be able to kick life back into the µA1.

_________________

Get a SAM, while you can! Let the X-Files come....

@Amiga_3k

Easiest way to set uboot back to default is to remove the battery for 10-15 min, might be worth a shot. You lose the h/w conf, udma settings, but should be bootable from the CD.

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@Fred_AROS


Can any one with a Micro A1 confirm if the keyboard leds normally flash on Boot up .

Quote:

Fred_AROS wrote: @Spectre660 No LED action on Keyboard @smf Using 8n1.device from Aminet .... no Problem getting 115.200 Baud here

_________________
Sam440ep-Flex 800Mhz ,1GB.Radeon HD6670 lowprofile via PCI to PCIe Adaper.
Sam460ex 1.15Ghz, 2GB.Radeon HD6670 . Apex TM-302-3 Case

Maybe this can help, page 26 in the pdf:

http://www.intuitionbase.com/handbook/en_uA1-C_Handbook.pdf

_________________
A1G3-SE + OS4.1 u1 iso (x2)

@Spectre660

Quote:

Can any one with a Micro A1 confirm if the keyboard leds normally flash on Boot up .

My HP PS2 keyboard and Logitech PS2 mouse are conected via a KVM switch to the MicroA1 and a pc. All three LEDS go on and then off simultaneously just after the Catweasle message appears on the screen and again just before the Boing Ball (boot) splash screen appears. One flash each time. All LEDS light up at the same time and go out at the same time.

If I use my old IBM keyboard, the LEDS flash three times ... once at power on, again just after the Catweasle message and again just before the Boing Ball (boot) splash screen appears. One flash each time. All LEDS light up at the same time and go out at the same time.

---
redfox

@Fred_AROS

The corrupted gfx, are they 8x8 text block based or just random garbled?

I see it's a bit hard for you to remove your VGA but I wonder, are you able plug in another VGA card into the micro?

Even so, at this point I would strip the machine, for minimum running. That is, remove all non-essential parts. Such as HD, VGA cables, KB and mouse. And remove memory. All I would have is power and a serial cable attached. You can leave your little case cables attached for power and LEDs.

I see from the handbook linked that the Micro doesn't have an onboard serial connector but instead a head onboard. I assume you have you have a known working serial adaptor connected?

Regarding the A1200 as a serial terminal, unless you have a serial card like a Whippet, I wouldn't rely on it. The hardware just isn't up to producing 115,200 baud. Not without software hacks or extra hardware. So unoess you can prove it works with another serial source forget it.

Now, it sounds strange but, removing memory is a good test. UBoot can still work but will stop with an error on serial with no memory. I had a problem recently when my A1 stopped dead after I changed a HD. There was nothing on screen. I stripped it down until finally I removed the memory. Before this I did get output on serial but it stopped dead at reading NVRAM. What UBoot does is utilise memory once it finds it. When I pulled my RAM UBoot stopped and this was normal.

When I put it back in it got stuck on NVRAM again. I found one of my two RAM sitcks had goen bad. Confirmed by putting it in as the only RAM and found the machine would not boot!

Even if UBoot find the RAM okay and thinks its okay in its report as it did over my serial the RAM can still be bad as I found when UBoot tried to use it. This may not be your problem but it must be eliminated.

So, long story short, get a 115,200 baud serial termial working normally. Pull the RAM from your Micro. Then hook up your Micro serial to the terminal and test again. I hope you get results!

@Fred_AROS

If this is the first time you have connected to the serial header..
This page is worth a read.

There are two "Standards" for serial port headers, and the documents
most often provided with the board are WRONG.

Just one more detail to trip over.

The photos and drawings in the article I provided are correct. Yes, I am sure, I've been running that serial poret successfully for many years.

Good Luck,
LyleHaze

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question=(2b||!(2b))

@lylehaze

Good article. It also reminds me of another thing to make sure of. And that is to be sure of using serial port unit 0.

@all

thx for all the replies

I'm sure serial is working fine with 115.200 Baud. I've hooked up an A4000 to the A1200 and can send files with 115.200 Baud with no Problem at all

I will check the other things this weekend and report back to you guys ... thx

Ok, to be sure for the Baudrate I got myself a PC from a friend o mine, everything else is correct as well, the header is ok, checked everything twice !!!

So I tried everything, from reseting UBoot to removing the memory ... Still no joy, I won't get ANY serial debug output

@Fred_AROS

Hmm... that really is sad.

_________________

Get a SAM, while you can! Let the X-Files come....

@Fred_AROS

That's not good, no. So the machine was working fine before with no hints of problems?

Have you hooked up the µA1 serial output before when the machine was working and tested it? The only thing I can think of that gives me problems is when I am hooked into the wrong serial port or the terrminal needs resetting.

So perhaps try your serial header on both internal ports just to check. And make sure your serial settings are 115,200 baud, 8N1 with hardware handshaking. That's what I usually use. You might as well try software handshaking as well.

But I haven't used an A1200 for serial debugging. Only my A1 or my Mac with USB serial adaptor.

Last edited by Hypex on 24-Jun-2012 at 07:17 AM.