Re: Bootable RamDrive

["Bill Garber" <willy46pa@comcast.net>]

"RedskullDC" <RDC@oz.org> wrote in message news:9gv_c.19741$D7.11925@news-server.bigpond.net.au...
: 
: "Rob Jones" <robsgreenneon@startmail.ca> wrote in message
: bc4b97a8.0409031654.4a8846f0@posting.google.com">news:bc4b97a8.0409031654.4a8846f0@posting.google.com...
: > I am thinking of making a RamDrive using EEPROM, so that it can be
: > changed easily. I would like it to be able to used as a boot drive:
: > Does the "Boot" absolutely need to be in Slot6? If I was to copy DOS
: > into the EEPROM, would it boot from that drive, or will it still
: > continue to boot from "S6,D1"?
: >
: > Thanks
: > Rob J.
: 
: Hi Rob,
: 
: Here is a link to a flashrom based disk-emulator card/programmer
: I made a few years ago:
: 
: http://redskulldc.50megs.com/flashrom/flashrom.html
: 
: Software/hardware details may come in handy for you.

I have one built. Actually, Vince Briel made a few prototypes and 
gave one to me in trade for something else. I write my files to the 
disk image using AppleWIN and burn it to the Flash Ram using the 
programmer on my PC, then insert it into the card and pop it into 
slot 2 of the Apple II and boot. Nice thing about my method is, 
I can erase and reprogram the chip in a few minutes and see what 
works and what doesn't. Also, when it does work, I can save the 
image and burn it later. I've redesigned the PCB with jumpers so 
that I can have 4 x 128K images on a 512K flash chip and set the 
jumpers to the image I want to boot, or, you could use the address 
lines to mod ProDOS to boot from the chip instead of DOS 3.3 ! 
I will be happy to pass along my 512K version of the PCB made in 
ExpressPCB to someone who wants to work on a ProDOS version.  :o) 
Email me and I'll work on it with you.  :o) 

Apple II Forever, and Apple II Together, 
Bill @ GarberStreet Enterprizez };-) 
Web Site - http://garberstreet.netfirms.com
Email - willy46pa@comcast.net



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