[sebhc] H8 configuration

[Carroll Waddell]

I found some 2114's in my OLD STUFF drawer a little bit ago. The XCON8 
ROM may have the H17 code on it. If not, I'll try burning an EPROM. I 
still have the H17 ROM code from years ago.
Carroll

Dwight K. Elvey wrote:

>Hi Carroll
> The ROM can just be a 2716 with code from the site as I recall.
>I don't think you need any special mods to use the 2716's.
>I think Anchor Electronics still has 2114's. There are also
>some board modifications that you'll need to make. Look at
>the pdf for the XCON8 to see what was modified ( I think it
>is just a jumper or two and a cap/resistor ). You need to
>undo these modifications as your board was configured
>for the XCON8 setup and not the PAM8( unless, of course that
>is what you have ). If you have the Z80 board you don't need
>either the ROM or RAM chips.
> I suspect that HDOS will find the serial port, it is just that
>my code is a complete bootstrap. My code runs before any
>thing else runs so I needs to initialize the serial port
>and specifically talk to it. It is not an application
>that runs under HDOS. The ROM only has code to talk to
>the cassette, not the serial.
> Remember, this is a bootstrap from ground zero. I do have
>code to write out the main code that I use for bootstrapping
>to the disk but, again, this is not a HDOS disk. It is
>just a disk that boots to the transfer program. I don't get
>all the HDOS calls to play with. This way, one only needs
>to enter the bootstrap code once from the front panel.
> Thanks for the port info.
>
> How many people out there have a PAM8 with the disk connected
>and running? What does your setup look like?
>Dwight
>
>
>  
>
>>From: "Carroll Waddell" <CarrollWaddell at sc.rr.com>
>>
>>Dwight,
>>I'm working on the same configuration, but I plan to have both the H8-5 
>>and the H8-4 in the machine. The cassette interface is port 370Q, the 
>>H8-5 terminal address is 372Q, and the H17 is 170Q-174Q. You can remove 
>>the 8251 on the cassette board to disable the interface.
>>I'm pretty sure that if you don't have an H8-4, the software will use 
>>the 372Q port on the H8-5. The H17 board that I bought was missing the 
>>H17 ROM and the 2114 memory chips. When I locate them, I'm going to set 
>>up a similiar system.
>>Carroll
>>
>>Dwight K. Elvey wrote:
>>
>>    
>>
>>>Hi
>>>I'm going to be setting up my older H8 to have the
>>>H17 board installed. The problem is that this machine
>>>has only the serial/cassette board ( H8-5 ) and not
>>>the H8-4 serial board. Is this configuration possible?
>>>I know that on the H89, the cassette and H17 are on
>>>conficting addresses. Can one configure this older
>>>setup to run without using the H8-4 board? Is there
>>>a way to share or disable the cassette address on the
>>>H8-5 board?
>>>Thanks
>>>Dwight
>>>
>>>
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>>>
>>> 
>>>
>>>      
>>>
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>>    
>>
>
>
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