Re: A new boot code for Alex Freed's Pseudodisk ][...

[Deckard <boutillon@free.fr>]

On Jan 31, 10:51 am, Alex Freed <alex_n...@mirrow.com> wrote:

> The big problem with my design is that you can't swap the simulated
> floppy on-the-fly.

I don't like to switch off/switch on my computer each time I want to
boot a new image.
Why don't you add an entry point in the rom code with something like
that:

JSR   $FF58  ; get slot
TSX
LDA   STACK,X    ; high $Cx??
STA AD+2
ASL              ; slot*16
ASL
ASL
ASL
TAX              ; index
STA   SLOT16
STA   P_UNIT

LDA   #08   ; AVR command: change origin
STA   PD8CMD,X

LDA   #$AA  ; image_start_sector=0
STA   PD8CMD,X

AD JMP $Cx00 ; reboot (SDBOOT or Beautiful Boot)

JM