05 April 2010, 09:42 | #61 |
Registered User
Join Date: Sep 2007
Location: Southport The Last Resort
Posts: 202
|
Hi Zetro - with the A601 disconnected I ge the 1Mb Chip ram....with it connected I get ~1.5Mb according to showconfig...
squidbass |
05 April 2010, 12:52 | #62 |
PSPUAE DEV
|
|
05 April 2010, 13:33 | #63 |
-
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,916
|
Showconfig will show the actual size of that block of memory, no matter if some of it has been allocated.
|
05 April 2010, 14:09 | #64 |
Registered User
Join Date: Sep 2007
Location: Southport The Last Resort
Posts: 202
|
I have got a 2Gb cf card in there but I'm sure showconfig is right...
|
05 April 2010, 15:50 | #65 |
Registered User
Join Date: Sep 2007
Location: Southport The Last Resort
Posts: 202
|
Here's a pic of this rev 2.0 A601 anyway....
|
05 April 2010, 16:10 | #66 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
I cannot see any obvious faults.
Although I think one of those chips has been replaced, its a little off-line... just a little (me and my OCD i tell ya lol) I would be inclinded to get the hot air out - de-solder both chips and put some new ones on, see if that cures the problem. |
05 April 2010, 16:15 | #67 |
Registered User
Join Date: Sep 2007
Location: Southport The Last Resort
Posts: 202
|
I would if I had a hot air station :-( But the two RAM chips do look slightly off centre and there are a few marks that suggest they may have been replaced at some point...also there's a spot where a resistor looks like it's been removed (just to the bottom left of the jumpers)
squid |
05 April 2010, 19:15 | #68 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
In regards to the restistor, I noticed this too, however after checking BBoAH i dont think its anything that one needs to worry about.
I would offer to help chap, but my plate it full at the moment, if you still have this issue in a couple of weeks then I might be able to help replace those chips for you. Before any of that though, one must quadruple check the obvious, like the connector, if the Chip(s) or components have a solder fault etc. |
05 April 2010, 19:57 | #69 |
Registered User
Join Date: Sep 2007
Location: Southport The Last Resort
Posts: 202
|
Yes I shall check the A600 side a bit more thoroughly tomorrow...thanks for the offer btw...i'm hopefully in line for your 8mb card (somewhere near the back arf!)...seriously though thanks for the offer but I know your time is valuable...
squid |
05 April 2010, 19:59 | #70 |
. . Mouse . .
Join Date: Jun 2005
Location: Nowhere
Age: 55
Posts: 1,792
|
Hi squidbass,
Just a thought. My 'hot air station' is a baking tin + a craft embossing hot air gun 'borrowed' from my wife. For small components it works well enough - I've reworked some simms and replaced a few surface-mount CPU's with sockets using one. Cheep, too. |
05 April 2010, 20:04 | #71 |
Registered User
Join Date: Sep 2007
Location: Southport The Last Resort
Posts: 202
|
Hi Charlie - that's a neat idea - I suppose I should investigate buying one of ebay...
squidbass |
05 April 2010, 20:50 | #72 |
I hate potatos and shirts
|
Nah, real men uses paint strippers to make electronics.
|
05 April 2010, 23:22 | #73 |
AmiBay MegaMod
Join Date: Mar 2007
Location: Manchester, UK
Age: 62
Posts: 1,163
|
Rkauer's right - Black & Decker paint stripper guns FTW!!
|
05 April 2010, 23:29 | #74 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
|
LOL,
Hot air is hot air, as long as you can control it, all is good. Practice is what it takes, so if you do go down this route pratice on some dead PC mobo's, I would also suggest you buy some FLUX, for removing (hot-air rework) I use Copperlite Plumbers flux from Wilkinsons, its a paste flux and can take a lot of heat (most liquid fluxes vaporise before you get enough heat on it)- just remember to clean the board VERY WELL before continuing. for soldering components I would recommend a good 0.022 pitch silver bearing solder and a good variable soldering iron set too about 320c laydown some good quality liquid no-clean flux and then just tack on the IC's. once tacked just heat the pad and leg and just touch the solder to the leg, flux and capiliart action will do the rest.. again... practice practice and more practice =) with a little practice each day one can get very good VERY quickly. heres a recent Minimig repair job I done recently (pitich is smaller but essentially the same thing) Before After |
05 April 2010, 23:46 | #75 |
PSPUAE DEV
|
LOL!!!!
Nice, lets break out the wifes hairdryers, . |
14 February 2013, 18:57 | #76 |
Registered User
Join Date: Jun 2012
Location: UK
Age: 44
Posts: 748
|
Sorry to resurrect an old thread but this is the only one about this problem!
I also recently acquired an A601 off everybodies favourite ebay seller And workbench is only reporting 1.5mb available. I've tried the jumpers in every configuration possible, but avail and showconfig always report 1.5mb installed. I'd like to open this thing up so I can take a picture for you guys but the thing seems sealed shut with solder on all the tabs. What's a good way to get it open? I don't have any special soldering tools, just cheap old hand iron. |
14 February 2013, 19:40 | #77 |
Registered User
Join Date: Jun 2012
Location: UK
Age: 44
Posts: 748
|
Right managed to get it open with the soldering iron while gently levering. Eventually the tabs popped. I took a couple of hi-res photos.
http://www.primebrand.co.uk/IMG_0958.JPG http://www.primebrand.co.uk/IMG_0959.JPG Any ideas what the problem could be? |
14 February 2013, 20:55 | #78 |
Registered User
Join Date: Apr 2010
Location: Italy
Posts: 1,136
|
test with sysinfo or floppy with wb, more utility use much ram
|
14 February 2013, 21:03 | #79 |
Registered User
Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 4,323
|
the jumpers on BBOAH show different locations for this card...
http://www.bboah.com/index.php?actio...highlight=a601 try setting them the same as the one in the link |
14 February 2013, 21:17 | #80 |
Registered User
Join Date: Jun 2012
Location: UK
Age: 44
Posts: 748
|
Thanks kipper, still no joy. I spent half an hour trying all the possible configurations, including no jumpers at all.
@cpiac64 I'm using classic wb2.1 green alien edition. It has sysinfo which always reports 1.5mb in the memory section. I've also booted from a WB disk and the situation is the same. Could be a failed RAM chip then? |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Wanted: A601 1MB Trapdoor Expansion | Solid Snake | MarketPlace | 7 | 06 January 2012 19:38 |
Bizarre CD32 SX-1 Expansion Question | imstarryeyed | support.Hardware | 10 | 12 March 2010 17:28 |
Question: Memory Expansion on A600 | gtrmn01 | support.Hardware | 4 | 09 January 2010 19:35 |
A500 RAM expansion question! | PowerPie5000 | support.Hardware | 23 | 22 July 2009 22:43 |
WTB: Amiga 600 chip ram expansion (A601) | Photon | MarketPlace | 8 | 02 July 2008 10:31 |
|
|