Comments on: Beebthernet http://www.cyberspice.org.uk/blog/2009/09/03/beebthernet/ The life and times of a jet setting software engineer! Mon, 02 May 2011 18:45:43 +0000 hourly 1 http://wordpress.org/?v=3.1 By: J.G.Harston http://www.cyberspice.org.uk/blog/2009/09/03/beebthernet/comment-page-1/#comment-550 J.G.Harston Mon, 15 Mar 2010 17:29:08 +0000 http://www.cyberspice.org.uk/blog/?p=273#comment-550 If it works via the slow I/O port, it should work via the 1MHz bus, avoiding preventing the Tube port being used to connect a Tube system. Alternatively, if you do want to go down the line of connecting to the Tube port, ensure you fully decode A4-A6 and only respond when not in Tube space and provide a pass-though conntector for access outside your space. If it works via the slow I/O port, it should work via the 1MHz bus, avoiding preventing the Tube port being used to connect a Tube system. Alternatively, if you do want to go down the line of connecting to the Tube port, ensure you fully decode A4-A6 and only respond when not in Tube space and provide a pass-though conntector for access outside your space.

]]> By: cyberspice http://www.cyberspice.org.uk/blog/2009/09/03/beebthernet/comment-page-1/#comment-60 cyberspice Tue, 15 Sep 2009 13:35:41 +0000 http://www.cyberspice.org.uk/blog/?p=273#comment-60 Useful link that. Not sure your suggestion will be useful for this project but I'll study that schematic as there seem to be ideas I can use :-) Thanks. Useful link that. Not sure your suggestion will be useful for this project but I’ll study that schematic as there seem to be ideas I can use :-) Thanks.

]]> By: Tetrafluoroethane http://www.cyberspice.org.uk/blog/2009/09/03/beebthernet/comment-page-1/#comment-58 Tetrafluoroethane Tue, 15 Sep 2009 11:58:37 +0000 http://www.cyberspice.org.uk/blog/?p=273#comment-58 Might I suggest a 2-phase clock signal? Run a 4-Mhz clock through through a couple D flip-flops and you can get yourself 2 2-Mhz clocks 90 deg. out of phase. Perhaps that will not work for your particular setup, but I figured I would suggest it anyway. I was able to recall a project I found which used such a setup (PDF warning): www.stevechamberlin.com/cpu/schematics.pdf. The last page contains the clock generator schematic. - Cheers Might I suggest a 2-phase clock signal? Run a 4-Mhz clock through through a couple D flip-flops and you can get yourself 2 2-Mhz clocks 90 deg. out of phase. Perhaps that will not work for your particular setup, but I figured I would suggest it anyway. I was able to recall a project I found which used such a setup (PDF warning): http://www.stevechamberlin.com/cpu/schematics.pdf. The last page contains the clock generator schematic.

- Cheers

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