Re: [N8VEM-S100:6410] Re: IMSAI 8080A CPU board help.

[litte...@mchsi.com]

yes, see my other post.

----- Original Message -----
From: "Crusty OMO" <crus...@hotmail.com>
To: n8vem...@googlegroups.com
Sent: Sunday, February 22, 2015 8:26:12 PM GMT -06:00 US/Canada Central
Subject: RE: [N8VEM-S100:6410] Re: IMSAI 8080A CPU board help.


Have you tried swapping RAM chips around? 


> Date: Sat, 21 Feb 2015 22:52:16 -0600 
> From: litte...@mchsi.com 
> To: n8vem...@googlegroups.com 
> Subject: Re: [N8VEM-S100:6398] Re: IMSAI 8080A CPU board help. 
> 
> Josh, 
> 
> I'm now using a comm port on the CPU board (w/HyperTerm & WinXP) & (The Console I/O) on the other. 
> 
> They echo/mirror each other for key press & screen, but it still won't respond to anything but < R > 
> for the Ram test that fails @042A 
> 
> Todd 
> 
> 
> ----- Original Message ----- 
> Todd, The firmware outputs to both the 8250 UART port 0 on board (I/O 20h) and to the Console I/O board at I/O 00h. 
> It will also accept any input from either console. If you connect them both, then you'll see a duplicate. 
> I was thinking of writing a seek and employee routine that would send messages to a range of I/O address and scan them all for a response ie, "Press <CR> to continue", but the variations were endless and such programming would take too much time. So I just hard coded support for the CONSOLE IO to the routines that already work with the on board uart. 
> 
> Cheers, Josh 
> 
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