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- Path: news-m01.ny.us.ibm.net!tpomar
- From: tpomar@ibm.net (Toni Pomar)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Fix for A1200 floppy problem
- Date: 12 Jan 96 13:36:25 CET
- Organization: Mail Manager 1.1x/n From Palma de Mallorca; Spain
- Message-ID: <24DF365E@ibm.net>
- Reply-To: tpomar@ibm.net (Toni Pomar)
- NNTP-Posting-Host: slip139-92-41-175.emea.ibm.net
- X-FTN-To: Michael van Elst
- X-GateSoftware: AmiGate 1.4d (8.8.95)
-
- Michael van Elst on 11 Jan 96 08:57:38 wrote
- a message about <Re: Fix for A1200 floppy problem>:
-
- MvE>>> It is a PC floppy. There are no such things as Amiga floppies
- MvE>>> anymore.
-
- MvE> >But Amiga flopies are simply floppies that supply DC and RDY
- MvE> >signal simultaneously on different pins. I think it's not
- MvE> >that strange (some PC drives do it, but not the ones used by
- MvE> >AT).
-
- MvE> That's what Amiga floppies are, they do use standard Shugart-Bus
- MvE> pin-out. PCs used their own standard that is now the only thing
- MvE> available. And no, PC drives do not have a ready signal, never
- MvE> had.
-
- Yes, they had (I adapted a Panasonic PC floppy for A500 some
- time ago and it had both signals). And earlier adpated a 3,5
- drive for my ZX Spectrum +3 without problems (I think it was
- a sony drive).
-
- Another thing is that PC has killed the signal in latest
- drives (killing standards is the most popular hobby in the
- PC world), but they had it at the beginning.
-
- MvE> Some PC drives do have a mounting option for a RDY signal but
- MvE> it is probably too expensive.
-
- And some has a switch for RDY or DC signal.
-
- MvE> >For a really perfect fix some more components have to be
- MvE> >used (several NOR gates, a condenser and some more), but I
- MvE> >needed an easy and fast fix, as I had little time to do it
- MvE> >(not me, but the owner of the A1200 being fixed).
-
- MvE> Right :)
-
- But in reading the Sync word of the Amiga disks act as a
- good substitute for the RDY signal, and in writing, usually
- the OS is used, and as the 3.1 ROMs are modified to use that
- drives, no problem :-)
-
- MvE> >soft! Forget it and use only the soft that comes with the
- MvE> >machine until the developers begin to support PC floppies."
-
- MvE> Well. The developers just needed to read documentation. They
- MvE> are soooo proud that they just use the hardware manual but
- MvE> cannot even read that.
-
- The RDY signal was in the manual too, so they used it
- because it was there an perfectly documented. The manual
- doesn't say that the singnal must not be used, and the 500ms
- delay is mandatory only in writing data, not in reading,
- that is what fails in almost all cases. Do you have the
- hardware manual?
-
- I am not so sure if it's the programmers, or AT, or both
- that break the rules, but I think that AT it's not the poor
- victim of evil and dangerous programmers...
-
- MvE> >It's a really bad image for the Amiga, and it's what dealers
- MvE> >are doing right now... :-\
-
- MvE> The real bad image is that there is hardly any good game software. With
- MvE> PCs such junk would have died out years ago. But with
- MvE> a small market like the Amiga's it must be tolerated.
-
- So bad are the Amiga games?
-
- Are you talking about all kind games or only about bitmapped
- games?
- _
- _ //
- \X/ Megs of greets 8^)
-