| Author |
Message |
Forum: Hardware Topic: Least Obvious Incompatibility |
| JenniferDigital |
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Posted: Wed Jul 08, 2015 5:43 pm
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Replies: 21
Views: 4976
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| Acorn made a valiant effort to guarantee a solid programming environment by having known jump ... and defined ways of using them. This was done so that programs would run from across the Tube amongst other reasons. It became apparent to me that I could patch some of these vectors ... |
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Forum: Hardware Topic: 6502 multiprocessing and Acorn's Tube |
| BigEd |
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Posted: Wed Sep 03, 2014 6:53 pm
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Replies: 12
Views: 9443
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| As you can see with a search we've mentioned Acorn's Tube previously - it's a coprocessor interface protocol, intended for the BBC Micro's operating system's ... |
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Forum: Hardware Topic: Pulling data bus to 0V with resistors. |
| BigEd |
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Posted: Sun May 11, 2014 5:57 am
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Replies: 10
Views: 2842
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| ... to take off-board, unbuffered, as part of the second-processor (Tube) interface. See the bottom left of http://www.8bs.com/boards/BBCBschematicJTribbeck.png ... I checked the service manuals at http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_BBCSMOct85_Sec1.pdf http://acorn.chriswhy.co.uk/docs/Acorn/Manuals/Acorn_BBCSMOct85_Sec2.pdf ... |
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Forum: General Discussions Topic: Acorn's Tube protocol over serial line |
| BigEd |
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Posted: Mon Mar 04, 2013 6:09 pm
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Replies: 0
Views: 1779
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| Over on stardot, "sweh" recently announced a Linux version of JGH's Tube host code , written in perl. So now you can connect your serially-equipped 6502, or embedded emulator, or indeed your Z80, 6809 or PDP11 based coprocessor, to a Linux host or a Windows ... |
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Forum: Programmable Logic Topic: A 6502 SoC Project using a Spartan 3 FPGA |
| BigEd |
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Posted: Sat Mar 19, 2011 5:43 pm
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Replies: 223
Views: 55522
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| ... 6845 CRTC, which would be a typical video controller in those days. The Acorn Electron approach was to gate the CPU clock, stalling the CPU during ... to the OS output routine can cause graphics operations. With the Tube chip and protocol, the machine with the VDU gets those output bytes ... |
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Forum: SBC- Series Projects Topic: Bootstrapping an SBC |
| BigEd |
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Posted: Tue Feb 09, 2010 9:57 pm
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Replies: 25
Views: 49394
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| ... quite easily, too - especially for those of us with (almost any) 8-bit Acorn kit (and some 32-bit kit, too) :D I think (hope!) any machine with ... can be repurposed. In my case, I'm interested in booting an SBC as a TUBE-connected parasite, hoping to avoid needing any ROM by using a minimal ... |
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Forum: General Discussions Topic: Survey: A 65C02-based PC |
| mdpenny |
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Posted: Wed Mar 05, 2003 8:26 pm
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Replies: 74
Views: 35511
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| ... CPU, such a board could be designed - if people are familiar with the Acorn/BBC Micro, these machines have a port on them marked "Tube" - this port allowed for a CPU board to be connected to the BBC Micro; the BBC Micro would ... |
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