Sparrow inspection

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thothy
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Re: Sparrow inspection

Postby thothy » Sun May 27, 2018 4:15 pm

mikro wrote:As promised, here's TOS 2.07 dump, for the first time in Atari history. :)


Thanks a lot for that dump! I've now committed some hacks to Hatari, so we can now load this TOS version there, too:

https://hg.tuxfamily.org/mercurialroot/ ... 5da396494b

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Greenious
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Re: Sparrow inspection

Postby Greenious » Mon May 28, 2018 7:12 pm

czietz wrote:How do you get to bit 3 here???

Code: Select all

8007   RW   dvim bs_c
            7654 3210


I'd still say the "bus error" bit i is number 5.


Sorry, brain lapse...
Updated my guides as of june 28th, 2016. Check'em out and feedback!
viewtopic.php?t=5040

Jeff_HxC2001
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Re: Sparrow inspection

Postby Jeff_HxC2001 » Thu May 31, 2018 7:35 am

mikro wrote:. my HxC started to behave...

How ?

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Re: Sparrow inspection

Postby mikro » Thu May 31, 2018 3:52 pm

Jeff_HxC2001 wrote:
mikro wrote:. my HxC started to behave...

How ?

No worries Jeff, you helped me to fix it on your forum. I guess you will find the information that your Atari ST Manager runs on the Sparrow flawlessly as interesting. :)

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Re: Sparrow inspection

Postby Jeff_HxC2001 » Thu May 31, 2018 7:55 pm

mikro wrote:
Jeff_HxC2001 wrote:
mikro wrote:. my HxC started to behave...

How ?

No worries Jeff, you helped me to fix it on your forum. I guess you will find the information that your Atari ST Manager runs on the Sparrow flawlessly as interesting. :)


ok, just got it :D.
Great news for the HxC+HxC Manager + Sparrow compatibility !
Can you send me a picture of the Sparrow running the manager with the HxC ? (And/or post it on the HxC Facebook group ? :
https://www.facebook.com/groups/hxc2001

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Re: Sparrow inspection

Postby mikro » Fri Jun 01, 2018 11:54 am

Apologies for the delayed post. As promised, here is a few photos and information I have gathered so far. I'm going to split it into several posts as AF bullies me about the post size, number of attachments etc.

Let's start with the motheboard:
IMG_20180531_222520.jpg

IMG_20180531_223324.jpg

As you can see, it's a typical Sparrow rev.2 board. Custom ICs are nicely presented here: http://www.old-computers.com/museum/pho ... =635&st=1$

IMG_20180531_223522.jpg

IMG_20180531_223608.jpg

IMG_20180531_223634.jpg

The case is, except its unusual colour, rather standard ST/Falcon one (with connectors matching Falcon 1:1 but the floppy side still has the narrow rounded button form)
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Last edited by mikro on Fri Jun 01, 2018 12:14 pm, edited 1 time in total.

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Re: Sparrow inspection

Postby mikro » Fri Jun 01, 2018 12:00 pm

Misc motherboard components:

IMG_20180531_222917.jpg

It looks like a younger brother to the (in)famous SR98. Not sure whether this was really the original PSU as the original owner had claimed to be it a 110V machine, what is clearly not. Anyways, as you can see, it's a truly ST/E compatible PSU judging from the connector.

IMG_20180601_121442.jpg

MVIMG_20180601_121513.jpg

Typical oldschool Epson floppy with the rounded button for which people love so much to butcher their Atari cases. Fortunately, Falcon has received "already cut" case.

IMG_20180531_224355.jpg

There hadn't been much of evolution for the 2.5" bracket. :-)
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Re: Sparrow inspection

Postby mikro » Fri Jun 01, 2018 12:01 pm

RAM card looks a bit dated, I think even more than the original one found in Falcon. This is a 14 MB model:

IMG_20180531_223415.jpg

MVIMG_20180531_223400.jpg


While I was at it, I tested a Falcon RAM card and thankfully, it works without an issue:
MVIMG_20180531_231634.jpg
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Re: Sparrow inspection

Postby mikro » Fri Jun 01, 2018 12:05 pm

The last post for now... Sparrow's imperfections. :)

IMG_20180531_225722.jpg

As there are no holes on the case, the bracket has to be mounted purely by screws. And since the screws are too tall, how do you install them? :)
IMG_20180531_230201.jpg

Not sure how much it's visible but the "teeth" of the PSU had to be cut out because the holes are too far away to fit.
IMG_20180601_110834.jpg

Not only the second hole doesn't match...
MVIMG_20180601_111434.jpg

... there is even a separate metal for that part! :)

Wiring on the back side:
IMG_20180531_224703.jpg

MVIMG_20180531_224902.jpg
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Re: Sparrow inspection

Postby mikro » Fri Jun 01, 2018 12:11 pm

Did I say the last post? All right, two bonus pictures. The Sparrow running the HxC file manager and (thankfully!!!) Parcp-USB:

IMG_20180601_122006.jpg

IMG_20180601_125720.jpg


This has allowed me to do further (software) testing as until now I had it connected to TV a couple of meters away from my laptop, therefore only the HxC was usable, making loading new software incredibly annoying.

There seems to be an issue with the monitor port / circuitry as I not only can't hear the key clicks but also nothing except RGB works. I could test both mono and VGA, I can hear it boot to desktop but there is no image. What is really strange at least as far as VGA is concerned because the seller clearly tested it on VGA. maybe the wiring around the monitor port has broke somehow. I guess I'll leave it as is for now, I can explore the machine as it is now and focus on fixing stuff later.
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Re: Sparrow inspection

Postby mzry » Fri Jun 01, 2018 12:35 pm

Very interesting. Looks like the DSP is larger than the final version, must be an older higher micron version I am assuming. Also is that a full speed 030 in ceramic packaging? I wonder :) Perhaps you need to run Bootconf to tell it to use VGA as default.
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Re: Sparrow inspection

Postby mikro » Fri Jun 01, 2018 12:48 pm

mzry: see my previous posts -- I can't use the standard NVRAM tools as they fail to accept the Sparrow as a NVRAM equipped machine. But yes, it's possible the NVRAM is the culprit here.

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Re: Sparrow inspection

Postby calimero » Fri Jun 01, 2018 7:11 pm

Nice posts :)

Does anyone know timeline of Falcon/Sparow development?

When and how planing starts? When they build prototypes...?
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