[Coco] running BASIC in RAM (was "Coco Questions")
Jim Cox
jimcox at miba51.com
Sat Jul 14 12:43:04 EDT 2007
I'm doing a little mailbox cleaning and I came across this
post from Aaron Banerjee, and would like to know why
someone would want to put their CoCo in all RAM mode?
Jim
On Sun, 29 Oct 2006 07:19:59 -0500 (EST)
Aaron Banerjee <spam_proof at worldnet.att.net> wrote:
>
> I'm not sure how useful this would be, but just in case
>there were silent
> lurkers hoping someone would post a short quip to put
>your coco in all ram
> mode (with BASIC running...). I've added comments
>showing what (I hope)
> is the assembly version of the driver.
> - Aaron
>
> 5 DATA 26,80:REM ORCC $50 MASK
>INTERRUPTS
> 10 DATA 142,128,0:REM LDX $8000 START
>OF BASIC
> 15 DATA 166,132:REM LINE15 LDA ,X
> 20 DATA 183,255,233:REM STA $FFDF MAP
>TYPE 1
> 25 DATA 167,128:REM STA ,X+
> 30 DATA 183,255,222:REM STA $FFDE GO BACK
>TO REGULAR MEM
> 35 DATA 140,255,0:REM CMPX $FF00 END OF
>RAM
> 40 DATA 38,241:REM BNE LINE15
> 45 DATA 183,255,223:REM STA $FFDF STAY IN
>ALL RAM MODE
> 50 DATA 28,175:REM ANDCC $AF UNMASK
>INTERRUPTS
> 55 DATA 57:REM RTS RETURN
> 60 REMEMBER THE ALAMO!!
> 65 FOR X=3584 TO 3609
> 70 READ D
> 75 POKE X,D
> 80 NEXT X
> 85 EXEC 3584
>
>
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