Ee?prom burners [Was: Re: CUBIX/6809 updates]

[Allison]

>
>Subject: Re: Ee?prom burners [Was: Re: CUBIX/6809 updates]
>   From: "Dwight Elvey" <dwight.elvey at amd.com>
>   Date: Tue, 13 Dec 2005 13:55:36 -0800 (PST)
>     To: cctalk at classiccmp.org
>
>>From: "Brian Wheeler" <bdwheele at indiana.edu>
>---snip---
>>
>>That said, the only thing that's really kept me from building machines
>>(heh, besides time and money!) is the lack of an eprom (or eeprom)
>>burner.
>>
>>What do you guys recommend?  Are there instructions for PC-driven
>>burners online somewhere that seem reasonable?  If not homebuilt, what's
>>a reasonable price for one?
>>
>
>Hi
> I recommend not getting one at all. I recommend using
>flash memory. There are a number of boot flash memories
>that would work well. You put some simple code in the
>boot part to get things bootstrapped up and then use
>the other segments of the flash for your development.
> Of course, you need to program the flash for the first
>time. For this, you could get someone to program one
>with your bootstrap code. Just remember, the bootstrap
>code should be something really simple. You might even
>make it something simple with a parallel port that
>handshakes the data. That way you could even avoid
>debugging the initialization sequence for a serial
>chip. The bootstrap code should only load into
>memory a fixed amount of code and then jump to that
>code. 256 bytes should be enough. From there, you
>increase the complexity as much as you like.
> The parallel port could be just 2 bits out and
>2 bits in.
> Just my thoughts.
>Dwight

For CUBIX that means a bit of work as the OS is rom resident.

Building a parallel port EEprom burner is trivial, Eprom for a 
limited design say one type is fairly easy.  Code the drive the 
parallel port is a PC coding problem and I hate PCs.

there are PCport designs on the net.

myself I have a S100 board that does 2716->27128 and through 
a hack I've done 27512s and 27010s.

Allison