[Coco] 64K ROM to RAM programs - where did this one come from?

[Arthur Flexser]

RAMROM is $FFDE, RAMRAM is $FFDF.  These are the addresses that switch
between the RAM/ROM mode and the all-RAM mode in the CoCo's memory map.

Art

On Tue, Jan 25, 2022 at 3:10 PM <richardcavell at mail.com> wrote:

> Where do you get the constants RAMROM and ROMROM from?
>
> > ;; copy ROMs to RAM
> > rom:
> > pshs cc
> > orcc #$50 ; disable interrupts
> > sts $fe
> > lds #$8000
> > loop@:
> > clr RAMROM
> > puls a,b,x,y,u
> > clr RAMRAM
> > pshs u,y,x,a,b
> > leas 8,s
> > cmps #$ff00
> > ble loop@
> > lds $fe
> > puls cc,pc
> >
> > Copies eight bytes at a time by temporarily using the stack.
> >
> > On Tue, Dec 14, 2021 at 3:48 PM Allen Huffman <alsplace at pobox.com>
> wrote:
> >
> > > The BASIC here may be reformatted, but the assembly is the same.  I
> think
> > > this came from Rainbow and was always called ROMTORAM or something like
> > > that:
> > >
> > > 10 READ A$:IF A$="X" THEN END
> > > 20 POKE 20000+N,VAL("&H"+A$)
> > > 30 N=N+1:GOTO 10
> > > 40 DATA 34,01,1A,50,10,8E,80,00
> > > 50 DATA B7,FF,DE,EC,A4,AE,22,EE
> > > 60 DATA 24,B7,FF,DF,ED,A1,AF,A1
> > > 70 DATA EF,A1,10,8C,FE,FC,25,E8
> > > 80 DATA 10,8C,FF,00,24,0C,B7,FF
> > > 90 DATA DE,EC,A4,B7,FF,DF,ED,A1
> > > 100 DATA 20,EE,35,01,39
> > > 110 DATA X
> > >
> > > Can anyone turn this in to 6809 assembly source code, or if you know
> the
> > > source (Rainbow?) maybe it was in there?
> > >
> > >
> > >
> > > --
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> > >
> >
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> >
>
>
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