Actually, that won't be the case... it will only be using half the linear addressing space of the flash card... so B-DOS would be trying to write to both the first 512bytes and last 512bytes of the larger sector depending which sector it 'thinks' it is writing to with it just allowing for 512 byte sectors.
It may be okay if the SD cards don't mind being told to write to the later half of each sector, but it would definitly be safer to use a proper 1GB card. Play.com still have 1GB Sandisk SD cards for £4.99. Certainly once I have written in 2GB support the card layout for it would be different depending on how it then has to calculate the fake geometry when it see's the real size, so whatever data would be on the card just now would not be seen correctly. Colin ===== Quazar : Hardware, Software, Spares and Repairs for the SAM Coupe 1995-2009 - Celebrating 15 Years of developing for the SAM Coupe Website: http://www.samcoupe.com/ ----- Original Message ----- > Well, they will work to some extent, although I make no warranties about it! > > The card size and multiplier reported by the SD card's CSD (Card Specific > Data) will be just about the same as a 1GB card - but the sector size is > 1024 bytes and not 512 bytes. The current Trinity B-DOS will "think" it is > talking to a 1GB card and will be reading and writing only 512 bytes per > sector, the other 512 bytes will be ignored, so only half the space will be > being used.
