| MDFS::Software.Tube.6809.HuwJones | Search |
| Dragon.doc Dragon.txt | (MSWord) 650K (Text) 26K | "A Dragon In The Tube" An article by Huw Jones in Electronics and Computing Monthly, August and September 1985 describing an interface to use a Dragon 64 (or Dragon 32 with 64K memory) as a 6809 copro. This uses a single 8255 PIA as a single communication path instead of the Tube ULA. It does not implement the Tube API and uses the same interface API as Microsystems coprocessor. |
| msys13-6.doc msys13-6.txt | (MSWord) 1.6M (Text) 25K | "Designing a 6809 coprocessor for the BBC microcomputer". An article by Huw Jones in Microprocessors and Microsystems, Vol 13 No 6 July/August 1989 describing a 6809 copro. This uses two back-to-back 6821 PIAs as a single communication path instead of the Tube ULA and does not implement the Tube API. |