Re: C= parts: Amiga ROMs

From: Joe Torre (joetee_at_mindspring.com)
Date: 2000-12-09 23:02:07

----- Original Message -----
From: "Daniele Gratteri" <sgratte@tin.it>
To: <cbm-hackers@dot.tml.hut.fi>
Sent: Saturday, December 09, 2000 8:11 AM
Subject: Re: C= parts: Amiga ROMs


>snipage<
> > A1000 ROMs should be really small, because they just contain a
loader
> > to read a 256K Kickstart from "DF0:". All ROM chips after
those and before
> > 3.0 should be 512K. 3.0 and later are 1MB. Since "official"
Kickstart
>
> 3.0 are 1Mb, yes, but it is composed by two 512Kb ROMs.

No, not quite true. (but a 1M KS would be hackable when its
available!)
 The 3.1 kickstart is also 512K.  The cool feature being that the
datapath to the roms is 32bits wide!
Kickstart being spread accross 2 x 128K x 16bits chips = 512K.
Thus an A1200 has a data path twice as wide (32) and twice as fast
(14Mhz) as A500-A1000-A2000 models, but still 512Kbyte.

JoeT also squatith Amiga@Mindspring.com !
    Amiga, BeOS, Linux, QNX, Windoze
So many mice: with so many meanings....

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