Synth-DIY Yahoo! Groups Archives

you can transplant a 8mb version and can upgrade a 4mb to a 8mb but with out the disk you have to add the code from epr to access it

the disk adds the code to the main board and not the memory expansion

the scrambled megs code allows you to make the mainboard know that the 8mb or 4mb is installed so that it will use the logic to switch the ram

with out it the machine is only seen as a 2mb machine

you need the 8mb eprom on the memory expansion and the pal chip so that it can do the logic ras/cas instructions

with out them on the expansion it will be only a 4mb board

but the 1 time disk set the code on the mainboard so that you do not have to do it manually like you have to with the scrambled megs code

and why i said about the mainboard eprom who was going to write the code to it so that you never need to add the scramble megs code

and there was only ever an memory expansion by emu

for the cost of manufacturing a new one and programming chips its actually cheaper to buy a 8mb emax2

but if there was enough interest to start up a kick starter for a new expansion board i can certainly get one made

but there needs to be enough pledges to even make it a non profit expansion

we already make a few upgrades for synths and replacement asic chips for ones no longer available and working on others

and my dual scsi floppy combo drive is nearly at the finishing stages late sept/early oct just waiting on metal work to be manufactured and powder coated

On 7 August 2014 20:33, tonykirby100@... [emax] <emax@yahoogroups.com> wrote:

Hi Jamie, Yes I have heard what you say before about the install disc. It was a way of ensuring you bought the upgrade from EMU I suppose. However, there is always more than one way to do things and as these chips fail it would be good to know if it works to just transplant an 8MB eeprom. I think it will, that is possibly why they soldered the eeprom to the board? To make it harder to change?

Emax

Re: [emax] Using keyboard parts for rack mount version

Attachments

Move to quarantaine