[Coco] NitrOS9 running on multicomp

[Neal Crook]

By the way, perching my board atop my copy of "Leventhal" was an homage to
Dave Philipsen's wirewrap photo from last week :-)

On 4 October 2015 at 13:40, Dave Philipsen <dave at davebiz.com> wrote:

>
>
> On 10/4/2015 4:10 AM, Neal Crook wrote:
>
>> Booted for the first time last night after getting the "final" bug out of
>> my serial driver.
>>
>>
>> https://github.com/nealcrook/multicomp6809/blob/master/photos/re_20151003_multicomp_nitros_boot.jpg
>>
> Very nice.  Congratulations on getting that up and running.
>
>>
>> The hardware is the 6809 flavour of Grant Searle's "multicomp" FPGA-based
>> computer, along with a new logic block that supports a 50Hz timer
>> interrupt
>> and a coco-compatible memory mapper (which is not currently in use, since
>> this is only a level 1 port).
>>
>> The boot image is a standard floppy disk image file, slopped onto an
>> SDcard
>> at a Known offset and accessed by the disk device driver accordingly. This
>> crude but effective technique allows the SDcard to hold multiple disk
>> images - it actually holds images for multiple OS and bits of software
>> (photos below).
>>
>> I also have a version of the FPGA project set up for James Moxham's
>> Cyclone
>> II PCB daughtercard (Kip Koon has that one up and running with all my
>> older
>> ports)
>>
> Does James have a Cyclone II project as well?  I have a little board of
> his that uses a Cyclone IV board.
>
>> Neal.
>>
>>
>>
>> https://github.com/nealcrook/multicomp6809/blob/master/photos/re_20150429_multicomp.jpg
>>
>>
>> https://github.com/nealcrook/multicomp6809/blob/master/photos/re_20150429_multicomp_cubix.jpg
>>
>>
>> https://github.com/nealcrook/multicomp6809/blob/master/photos/re_20150509_multicomp_basic.jpg
>>
>>
>> https://github.com/nealcrook/multicomp6809/blob/master/photos/re_20150509_camelforth.jpg
>>
>> also running FLEX but I don't seem to have a photo of that.
>>
>>
>
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