Emax

The Emax main CPU is a National Semiconductor NS32008 and the data sheets are included in the NS32000 Family databook, which is available for free 
download from http://www.bitsavers.org/pdf/national/_dataBooks/1986_NS32000_dataBook.pdf

I think the issue is more that without the OS source code and documentation it is a long and grueling task to go through the OS binaries to disassemble 
them and understand how they work. There will no doubt also be various design constraints that can only really be discovered by trial and error when 
you don't have the original design documentation. Then you still need an assembler to reassemble the modified code.... but it can be done...

On Fri, Aug 7th, 2009 at 9:37 PM, jammie <jammie.emma@...> wrote:

> we would need to ask emu for the assembly langauge and opcodes but if
> they are like ensoniq then they will say no 
> 
> 
>   ----- Original Message ----- 
>   From: mr julian 
>   To: emax@yahoogroups.com 
>   Sent: Friday, August 07, 2009 9:38 AM
>   Subject: Re: [emax] Using Programmed PIC micro Controller
> 
> 
>     
>   ...I think the problem is, ted looked very hard and couldn't find
> the 
>   datasheet (and therefore the opcodes) for the microprocessor the
> emax 
>   uses.. and without anyone knowing what the opcodes are, no
> disassembly 
>   or hacking is possible.....
> 
>   so to modify the emax to boot off a different kind of device, or
> handle 
>   more banks per disk, you'd have to replace the main microprocessor,
> and 
>   rewrite everything from scratch.
> 
>   that's do-able, but wouldn't exactly be fun...
> 
>   jammie wrote:
>   > if there is enough room on the boot rom it can go on there 
>   > 
>   > just need to have an instruction to boot the reason they put os
> on floppy was because that way they could change the os when ever
> with out haveing to reflash the rom
>   > 
>   > on the akai,s they installed it on there rom with the
> instructions to rewrite os to flash rom
>   > 
>   > with the emax rom you would need to take out rom reformat it the
> reflash it it would be alright to do this now as there is no new os
> for it
> 
> 
>   
> 
> 
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