This computer can run Microsoft BASIC and the Scrumpel monitor originally made for 68HC11 but ported to 6809.
I also wrote a Forth for it.

Nforth evolves, here the next version:

An 68B09 SBC with 16KB ROM and 32KB RAM, 8 bits I/O and 2 serial ports @ 115200 baud.
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This computer can run Microsoft BASIC and the Scrumpel monitor originally made for 68HC11 but ported to 6809.
I also wrote a Forth for it.
Nforth evolves, here the next version:
scrumpelmonitor.pdfThe user manual of the ScrumpelmonitorAdobe Portable Document Format - 229.30 kB - 02/20/2021 at 09:06 |
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scrumpel8bv1_1.zipNew gerber files using Scrumpel8bV1.1 schematic.Zip Archive - 146.52 kB - 02/17/2021 at 08:02 |
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scrumpel8bv1_1.pdfThe corrected schematic diagram of Scrumpel8b with CPU pin 39 connected in the right way.Adobe Portable Document Format - 160.30 kB - 02/17/2021 at 05:06 |
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scrumpel8b.pdfSchematic diagram Scrumpel8bAdobe Portable Document Format - 161.19 kB - 02/11/2021 at 06:56 |
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scrumpel8a.pdfSchematic diagram Scrumpel8aAdobe Portable Document Format - 157.49 kB - 02/10/2021 at 13:45 |
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I placed the corrected schematic from Scrumpel8b, this will work as expected. TSC wasn't connected what caused that the CPU goes randomly into tri-state so the program wasn't executed in the right way.
First publishing of all info for Scrumpel8 an 6809 SBC
Pin 39 TSC of the 68b09 must be connected to ground via a 4K7 resistor to work properly. In version 1.1 this is solved..
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Nice project :-)
Did you make your Forth from scratch?
Which legacy system was the source for the BASIC?
How do you deal with persistence of programs, both in Forth and in BASIC?
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The Forth I made it originally for my 68HC11 from scratch. I ported it for 6809 which was not to difficult. I use the Grand Saerle BASIC . I have the BASIC in ROM plus my Scrumpelmonitor ported from the 68HC11. The Forth runs from $0100 and I load it with my monitor into memory.