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- Newsgroups: comp.sys.amiga.hardware
- Path: sparky!uunet!mcsun!fuug!funic!nntp.hut.fi!nntp!jraja
- From: jraja@vipunen.hut.fi (Jarno Tapio Rajahalme)
- Subject: Re: A1000 kickstart WOM
- In-Reply-To: apel@physik.uni-kl.de's message of Wed, 22 Jul 1992 13:04:04 GMT
- Message-ID: <JRAJA.92Jul27131752@vipunen.hut.fi>
- Sender: usenet@nntp.hut.fi (Usenet pseudouser id)
- Nntp-Posting-Host: vipunen.hut.fi
- Organization: Helsinki University of Technology, Finland
- References: <1992Jul22.130404.21766@rhrk.uni-kl.de>
- Date: 27 Jul 92 13:17:52
- Lines: 25
-
- In article <1992Jul22.130404.21766@rhrk.uni-kl.de> apel@physik.uni-kl.de (Martin Apel (SAGA)) writes:
- > Does anybody know exactly, how the bootrom is hidden when Exec
- > starts up, and if there's some other hardware beside the memory
- > affected by that switching too?
-
- The bootrom is hidden by writing on it, i.e. any write access on the
- bootrom address space will do the work. As a 'side effect' the
- kickstart ram is write protected.
-
- By the way, does ANYBODY know how to expand kickstart ram to 512k?
- This involves piggybacking the chips, moving boot rom 1/2 meg lower in
- address space and reprogramming the boot rom.
-
- I have disassembled & commented the whole boot rom to reassemblable
- asm-code, so the reprogramming won't be a problem, but I don't know
- exactly how to add the ram, and what modifications/additions are
- needed to pals etc..
-
- Jarno
- --
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- | Address: Jarno Rajahalme | EMail: |
- | Servin Maijan tie 12 H 111 | Jarno.Rajahalme@hut.fi |
- | 02150 ESPOO, FINLAND | tel: +358 0 468 2891 |
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