Emax

No I did not mimic a floppy-
I bought the emax schematic, determined how Emu interfaced the floppy  
(schugart interface, not standard PC), took a floppy converter board  
that uses slim floppy, and modified it to Schugart spec.

Anyone with know-how can do it.
But since most musicians are not necessarily Electronics tech, I  
provide the floppy converters so that it is a plug and play solution  
for them /us.
I could have done the mod 2 x for my own emax and never told a soul.  
But that is not in the spirit of this community.

SCSI was available from the manufacturer previous, and I got  
assistance to recreate a valid binary image for the Locking PAL.
That is how that happened.
All I have done there is re-create similar to the original mfr kit.
The SCSI CF drive I use is a standard SCSI drive, no modification.
I am not emulating anything.....

BTW- you can get a brand new CF drive for a lot less than that USB  
stick thingy, though it does get about 30 more banks.....

But I got my CF drive for like, $5 or $10 used. It does happen, you  
just have to get lucky, keep searching.

As it is, you can get into a more modern type of media for a lot less  
than $350.

I dunno where you are located that you cannot get a slim floppy / scsi  
drive.

ebay is worldwide.

I helped someone else find a slim floppy in germany on ebay for  
germany for less than $10USD.
Here they are less or more depending on used or new.....

As to the assembler, stuff - Rob at Emu Archive said he spent more  
than 2 years trying to get those binaries for the SCSI.
I doubt they are going to let the OS go- if they even have the  
assembler anymore.... look what happened with the SE update disk, and  
the memory expansions for Emax 2......we thought they were gone  
forever....

BTW- did anyone win that unused mem expansion on ebay for Emax2? what  
happened with that.....


Regards,
Ted



On Aug 7, 2009, at 3:23 AM, Colin Peiris wrote:

--- Hi Julian thanks for the info.
But the emulator or converter just do what the existing processor  
wants. So, I think u need not to worry about the processor just mimic  
the floppy. that is what Tod must have done.
Best regards
amacolp
In emax@yahoogroups.com, mr julian <jujulilianan@...> wrote:
 >
 >
 > ...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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