Date   : Mon, 27 Nov 2006 17:41:22 +0000 (GMT)
From   : chris@... (Chris Johns)
Subject: More sideways RAM questions

On Mon, 27 Nov 2006, David Harper wrote:

> You will have to do what you require by loading chunks of the file into main
> RAM, then writing across to the SW-RAM. You should be able to get it faster
> than 15 seconds, though.

I did it this way for my Electron sideways RAM (an old 16k beeb RAM that 
only had the one flying lead (R/~W) to was easy to connect to my AP3.

I was lazy and loaded the whole image into &2000, then copied into RAM 
(this copy needs to be in machine code, else BASIC will be paged in).

If you didn't want your loader to splat the main RAM you could copy the 
main RAM into sideways RAM, load into main RAM the swap the two over.

That's probably what the SJ *RLOAD does, tho I've not disassembeled it to 
see.

My Watford RAM board just requires you write some address then *LOAD the 
image, so I guess it can tell the write is to sideways RAM.

Cheers

Chris

-- 
  Chris Johns <chris@...             >