Re: identifying an unknown eprom content

From: smf <smf_at_null.net>
Date: Thu, 27 Aug 2020 17:21:50 +0100
Message-ID: <b834a754-7029-b7e3-d29d-4e2de72f22d4_at_null.net>
On 27/08/2020 12:14, didier_at_aida.org wrote:

 >I'm thinking to a c64 cartridge in ultimax mode (booting in $E000)

Ultimax is just a 65xx boot rom, so any other boot rom (including the
c64 kernal) looks kinda the same.

The bytes at $e000 & $e001 are used as data, but also the irq/brk vector
points to $e000 so any irq or brk will go into an infinite loop.

Reset or nmi will start execution at $e002.

 >I have 2 eproms labeled:   pc-central-26-4.bin (8k)  and
boot-poste-3.bin  (4)

 >the boot-post-3.bin contains the good content...  [the copyright is
present]

Are the two roms related? It might help to have them both
Received on 2020-08-27 19:00:03

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