[Coco] DE-0 Nano Successfully Programmed!

[Dave Philipsen]

Well, I've already converted Grant Searle's 6809 BASIC Multicomp 6809 
project to run on the DE1 board so it's just a matter of plugging in a 
VGA monitor, a PS/2 keyboard, and loading up a sof file and you've got a 
BASIC 6809 computer with well over 32k of program space (the Microsoft 
MEM variable is a signed 16-bit integer so when I do a PRINT MEM it 
tells me "-8944" because the BASIC ROM is moved up to $E000 freeing up 
extra space for BASIC programs in RAM).  It runs the 6809 core at 
basically 16.66 MHz right now which is a whole lot faster than any real 
CoCo!  The core will run at 25 MHz but I have not figured out a way to 
get the SRAM on the DE1 board to go that fast yet.  Remember this is not 
even close to being a CoCo.   It's just a 6809 BASIC computer with a 
80x25 VGA text display.

Dave


On 6/5/2015 8:25 PM, Bill Nobel wrote:
> Thx, for the comment Dave,  That was the exact thing I am going after.  I want to eventually do that exact thing.  I have an idea of the new Coco on FPGA that can be more than what I need.  MMU and all.
>
> Bill Nobel
>
>> On Jun 5, 2015, at 7:15 PM, Dave Philipsen <dave at davebiz.com> wrote:
>>
>> This is just an opinion and you may have a different mission but some of the other boards are more robust in their ability to aid with troubleshooting and provide visual cues.  For instance, the DE1 has 7-segment displays which could display a 16-bit address, there are more LEDs and switches, it has a VGA port and a serial port, keyboard port, etc.  But if you're looking for a lot of DRAM the Nano does have that.
>>
>> I'm just mentioning this because some people (including myself) have found it very cool to experiment with CPU cores (6809, Z80, 6502, 8085, 8088, 68000, etc.) and to do much interactive programming and testing it really helps to at least have a serial port if not a VGA display.  Of course you can add those things to the DE0 Nano with a little wire, some connectors, and a few other parts.
>>
>> Dave Philipsen
>>
>> On 6/5/2015 7:46 PM, Bill Nobel wrote:
>>> Thx Ed,  I have been looking into this extensively and want to get one.  The Deo seems to be my best choice for now, Not because of price, but features embedded on the board.
>>>
>>> Bill Nobel
>>>
>>>> On Jun 5, 2015, at 6:41 PM, Zippster <zippster278 at gmail.com> wrote:
>>>>
>>>> The Quartus design environment supports both.
>>>>
>>>> - Ed
>>>>
>>>>
>>>>> On Jun 5, 2015, at 7:05 PM, Bill Nobel <b_nobel at hotmail.com> wrote:
>>>>>
>>>>> Hey Kip,  I have been thinking of getting a Deo-Nano, but have a question.  Can you still use VHDL for coding or is it just Verlog now?
>>>>>
>>>>> I see in some of the documentation that VHDL is still available, but most of the reviews say Verlog is the main system.
>>>>>
>>>>> Bill Nobel
>>>>>
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