[Coco] NitrOS9 running on multicomp

[Bill Nobel]

Hey Neil, just had a look at your repo.  You are one step ahead of what I wanted to create on my Nano.  I am still debugging my external 512k SRAM, but have 32k internal working perfectly.

Bill Nobel

> On Oct 4, 2015, at 1:00 PM, Neal Crook <foofoobedoo at gmail.com> wrote:
> 
> 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 <mailto: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 <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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