[Coco] Bit-Banger Serial as external console?

[Stephen Pereira]

Hi again, Art,

I was making it more complicated than I needed to.  I did some experiments and found that BASIC definitely does not want a negative offset.  Then I finally tried:

LOADM”REMOTE”,55808

That wrapped around within the 16 bit address space to put the code at $1900.

However, I find that the Color Forth bypasses what I set up with calls to $A1B1 (Blink The Cursor While Waiting For A Keystroke) and this seems to bypass my remote input driver.  BAH!  I still get all the output from the CoCo to the remote terminal, but the remote terminal cannot type into the CoCo.  That’s the one thing that I need to get going.

Oh well, I wanted a project and it appears that I have one!

Thanks!

smp
- - -
Stephen Pereira
Bedford, NH  03110
KB1SXE


> On Mar 27, 2019, at 7:02 PM, Stephen Pereira <stephen.m.pereira.sr at gmail.com> wrote:
> 
> Hi Art,
> 
> I read the description for LOADM and it says that I can add an offset to where the program is supposed to load.
> 
> The program is supposed to load at $3F00.  I want it to load at $1900.
> 
> How do I specify a negative offset?  Is it simply -$2600?
> 
> So would the command be:
> 
> LOADM”REMOTE.BIN”,-&H2600
> 
> or
> 
> LOADM”REMOTE.BIN”,-9728
> 
> Thanks in advance, for all your attention and advice!
> 
> smp
> - - -
> Stephen Pereira
> Bedford, NH  03110
> KB1SXE
> 
> 
>> On Mar 27, 2019, at 6:03 PM, Arthur Flexser <flexser at fiu.edu <mailto:flexser at fiu.edu>> wrote:
>> 
>> If the code is position-independent, there's no need to reassemble it.
>> Just load it in to wherever you want it using an offset, and resave it
>> there.  For example, if it is currently at $3F00 and you want it at
>> $2000, try LOADM"REMOTE",&H2000-&H3F00.
>> 
>> Art
>> 
>