Anyone debug why this crashes ?

[exxos]

All it does is run x& = Maddalt&(4194304,2097152) but when the program finishes , it will say program terminated (as expected) but then it bombs... but why ?

FRAM.zip

EDIT:

As far as I can tell, it crashes on RTS, so I assume its a stack issue..

[mfro]

Maddalt() adds/hooks memory previously not known into internal GEMDOS memory management.

If it crashes, I would assume the added memory is either not where you told GEMDOS or it was already included in the internal management before (error checking is very simplistic, as I recall).

Other than that, it's impossible to tell without knowledge what you exactly do on what exact hardware and how it was initialised before.

[exxos]

The alt-ram is where its supposed to be, I verified the RAM locations in STOS. So its there. So there shouldn't be any problem in allocating it. But it mostly seems to be when the installer quits, I get 4 bombs.

https://www.exxosforum.co.uk/forum/viewt ... &start=270

[mfro]

The alt-ram is where its supposed to be, I verified the RAM locations in STOS. So its there. So there shouldn't be any problem in allocating it. But it mostly seems to be when the installer quits, I get 4 bombs.

I would probably start with a specialised RAM test routine to make sure it works reliably?

[exxos]

I would probably start with a specialised RAM test routine to make sure it works reliably?

Works fine when I access it from STOS.

[exxos]

Still don't get why it doesn't work..

All I do is x& = Maddalt&(4194304,2097152)

If I run this inside GB6, it installs and lets me run tests, but then bombs when I try and exit the program.. When I just run the line on its own...

IMG_6138.JPG

I don't know how to install the FRB cookie, so maybe thats the problem ?

[exxos]

Tried to program this in ASM, it compiles but when I run it, I get 4 BOMBs :(

Code: Select all

	move.l	$200000,d1
	move.l	$400000,d0
	move.l	d1,-(sp)		; Size
	move.l	d0,-(sp)		; Addr
	move.w	#20,-(sp)		; Maddalt
	trap	#1				; GEMDOS
	lea		10(sp),sp

[mikro]

Well if that was really it, no wonder - you need to correctly terminate it - see https://freemint.github.io/tos.hyp/en/g ... tml#Pterm0. And while you are at it, adding Mshrink() at the beginning wont hurt either ;) - https://freemint.github.io/tos.hyp/en/g ... ml#Mshrink, for usage see: http://tho-otto.de/hypview/hypview.cgi? ... 8&index=35

[thorsten.otto]

That should probably read:

Code: Select all

	move.l	#$200000,d1     ; <--
	move.l	#$400000,d0     ; <--
	move.l	d1,-(sp)             ; Size
	move.l	d0,-(sp)            ; Addr
	move.w	#20,-(sp)           ; Maddalt
	trap	#1				; GEMDOS
	lea		10(sp),sp
	
	clr.w -(sp)
	trap #1

[exxos]

Thanks..

So this doesn't bomb, but doesn't seem to install alt-ram either :(

Code: Select all

	move.l	$200000,-(sp)		; Size
	move.l	$400000,-(sp)		; Addr
	move.w	#20,-(sp)		; Maddalt
	trap	#1				; GEMDOS
	lea		10(sp),sp

	move.w    #0,-(sp)     ; Offset 0
	trap      #1           ; GEMDOS
	addq.l    #2,sp        ; Correct stack