[Coco] NitrOS9 running on multicomp

[Bill Nobel]

Oops, just noticed I spelt you name wrong Neal. Sorry, I hate auto correct.

Bill Nobel

> On Oct 4, 2015, at 2:41 PM, Bill Nobel <b_nobel at hotmail.com> wrote:
> 
> 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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