WOOHOO - Nice going :D -----Original Message----- From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] On Behalf Of Colin Piggot Sent: 12 January 2009 00:16 To: Adrian Subject: Re: SAM Revival issue 22 out now!
I wrote... > Looks like I'll have to get my hands dirty with some Z80 at the > weekend... And I have! The patched ROM3 is ready. By removing the rainbow stripes and the copyright message I freed up 130 bytes and just managed to squeeze my new code in the ROM to first check that the Trinity Ethernet Interface is connected then fetch in a 1K bootblock from the Trinity's 128K EEPROM and execute it. I've just got a simple test routine stored in the EEPROM for the time being so I could check it was all working, but the next step is to write code so it can then fetch in the full DOS from the EEPROM too which should be a relatively straightforward task to write. Of course though the 1K bootblock in the EEPROM could contain whatever you want so there's nothing stopping anyone else to write their own code to pop in the EEPROM to execute on startup. I'll be writing up all what I've done for the next SAM Revival magazine and including all the source code for the ROM patch, the finished bootblock and installer for getting it to load DOS on startup. There'll also be some skeleton code for creating your own bootblock routine for it to execute on startup. I've got some EPROM chips on the way so will have the new ROMs available later this week. 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/ APB Computer Services Ltd. Registered Address: 3 Springfield, Trevadlock, Congdons Shop, Launceston, Cornwall, PL15 7PW. Registration Number: 4942193. V.A.T. No: 826 0005 70 This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.
