24 September 2008, 13:08 | #41 |
Amiga Nut
Join Date: Oct 2006
Location: Belco, Australia
Posts: 2,242
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When fitting my MegAchip & reading the manual I saw interesting stuff about older/newer boards Agni, etc.
Maybe have a look at this for some ideas about board differences http://amiga.resource.cx/exp/megachip#m_megachip PZ. |
08 January 2009, 22:26 | #42 |
Needs a life
Join Date: Jan 2008
Location: England
Posts: 1,707
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Just bumping this again
I fitted a replacement known good agnus that my marvellous friend Zetr0 sent (is he around, not seen him for a while) Same. Bloody. Thing. Replaced the original agnus, and now the thing is not stuck in its reset loop: it gets to white (or possibly light grey), then flashes the power LED once and hangs. I think there is some damage in the agnus socket - I hate changing those things, but that looks like the next thing. Before I do... Is there a way of testing this TTL flip floppy thing before I waste hours on the sodding agnus socket? |
08 January 2009, 22:28 | #43 |
Needs a life
Join Date: Jan 2008
Location: England
Posts: 1,707
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I should mention that I've also changed every socketed chip (CIAs, Buster, 68000, Agnus, denise, gary, paula...) for known good ones with no effect whatsoever.
It's looking like a connection problem somewhere, or faulty logic chip. |
08 January 2009, 22:46 | #44 | |
Registered User
Join Date: Nov 2006
Location: Amigaville
Age: 46
Posts: 3,338
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Quote:
The Agnus is a pain in the bum to get out as it is - so if they've buggered up the KS socket then god only knows what they've done elsewhere. The shit would hit the fan if Dave Haynie knew about this . |
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08 January 2009, 22:56 | #45 |
Needs a life
Join Date: Jan 2008
Location: England
Posts: 1,707
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It was bought as non-working, so I can't really complain. I am wondering if it could be faulty RAM... |
09 January 2009, 05:41 | #46 |
I hate potatos and shirts
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Yes, can be one RAM chip at fault, but first try to replace the TTL 74LS32 next to the Agnus socket. Even better if you score a 74ALS32 instead. Even better: a 54ALS32 (MIL-SPEC TTL - no joke!).
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