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Rockbox mail archiveSubject: More news: Survey wrapup (who has a non-V1 boot ROM?)More news: Survey wrapup (who has a non-V1 boot ROM?)
From: [IDC]Dragon <idc-dragon_at_gmx.de>
Date: Thu, 9 Oct 2003 10:09:03 +0200 (MEST) > This is bad news, unless the boot ROM is hidden and can be re-enabled, > these > boxes have no such thing as a recovery option via UART boot. On the other > end, for most people this probably would make no practical difference, the > required mods are not suitable for everybody anyway. Better news is that re-enabling may be possible. I just had a look at a dissected FM (PCB rev 2.1), and found preparations on it to boot from flash instead of ROM. So it could have been a V2 as well. Close to the CPU there is a jumper resistor at the MD1 pin. Pullup means ROM, pulldown would be flash. This means the flash would need to be selected with /CS0, and indeed the board is also prepared for that. There is a zero ohm resistor from /CS2 to the flash, but next to it is a footprint for a double diode alternatively. Together with the existing pullup this would form a wire-or, selecting the flash for both regions. It would be worth trying for somebody with a V2 to do the UART mod and change to boot ROM again. If there is a buried ROM with the usual content, the UART boot would work. You could use it to flash the normal content, thus having a V1 then. > One more thing worth finding out: maybe these boxes have a SH7032 CPU, the > romless version with double IRAM size, instead of the usual SH7034. Has > anybody opened it up? ... > I'll add some code to the H/W info to find out IRAM size. I did add the check, does somebody want to try this rockbox variant? It's not in the official build, but I can email you an ajbrec.ajz. Jörg -- NEU FÜR ALLE - GMX MediaCenter - für Fotos, Musik, Dateien... Fotoalbum, File Sharing, MMS, Multimedia-Gruß, GMX FotoService Jetzt kostenlos anmelden unter http://www.gmx.net +++ GMX - die erste Adresse für Mail, Message, More! +++Received on 2003-10-09 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |