Thanks, now it's clearer I'm disassembling the rom found on zimmer (the sasi part) I'm trying to find the memory map from the schematics (not so easy to read, problem of quality) Till now I found: - 6502 - 6522 ???? - 2716 $F800 (a part is not used) - 6810 ???? Apparently the 6522 is connected to 2 jumper on PB4/PB5 (according to the pin number) No idea of the use of these jumper ? hard disk selection 9060/9090 I think I've found all the chip select... decoding... -----Message d'origine----- De : email@example.com [mailto:firstname.lastname@example.org] De la part de Ethan Dicks Envoyé : mercredi 25 décembre 2013 04:39 À : email@example.com Objet : Re: 9060/9090 On Tue, Dec 24, 2013 at 4:55 PM, didier derny <firstname.lastname@example.org> wrote: > I’m playing with sasi recently and I’m looking at the schematics of > 9060/9090 (taken from commodore.ca) Cool. > Any idea of what really is the component between the 6522 and the > 2716 The number written is either 5810 (most probably) or 9810 it has 24 pins. > > Is it a 128 byte ram ? Yes. It's really a 6810 Motorola 128 byte SRAM. > Apparently the most interesting software is In this 2716… There are two sets of firmware in there (two CPUs). One talks to the PET via IEEE and understand CBM DOS commands, the other talks to the SASI board, and they have a patch of SRAM for shared data. > Any idea if a source code exist for this rom ? > I would like to extract the sasi commend really send by this board There may be some manual disassembly out there, but I do not think it's as extensive as for the BASIC and KERNAL ROMs -ethan Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2013-12-25 10:00:04
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