bs2/bs2e read/write

Tobias

···· I finally figured out how to create·a multi slot program, I had a program in bs2 with four settings and when it went to setting two I had it write 1, 2 and at setting three write 1, 3 and so on, then when·I started the program I made it to read 1, set and had it go to the set number setting. Because when I would turn off the power to the bs2 at setting 3 then restart it later it would automatically goto setting 3. Now I'm still working with four settings but with the bs2e and a slot for each setting, is it possible for me to somehow create the same process? I tried the read and write but it seems like it reads and writes in its own slot not on the entire four slots.
Thank-You
Toby

Unsoundcode

Hi Tobias, the STORE command used before a read/write will tell your program where to store the data

If you want your data stored in slot·0 then :

STORE 0

WRITE 0,x,y

to read from any other slot

STORE 0

READ 0,x,y

Jeff T.

EDIT just realized STORE is not valid for the BS2e but there is an example in the STORE help file of·pointing the read/writes to the same memory location.

Post Edited (Unsoundcode) : 8/4/2007 6:55:37 AM GMT

Tobias

Thankx for the advise, but I can't make it work with the bs2e. Would there be any other alternative?
Toby

Unsoundcode

Hi Toby, if you have a slot to spare what you could do is use·slot 0·as a pointer to the last program slot that was running on power down. Each time the program enters a slot it passes·the slot number via the scratchpad ram which is then written to slot 0 eeprom.

·<---SLOT 0

---

>
·GET 62,x
·IF x<>0 THEN
·WRITE 0,x
·RUN x
·ELSE
·READ 0,x
·IF x=0 THEN
·RUN 1
·ELSE
·RUN x
·ENDIF
·ENDIF

Each slot would have the following code as the first few lines

GET 62,x
·IF x<> current_slot_number THEN
·PUT 62,current_slot_number
·RUN 0
·ENDIF

Jeff T.

·Edit: forgot to include the read statement first go round

Post Edited (Unsoundcode) : 8/5/2007 6:29:55 AM GMT

Tracy Allen

A little less complicated might be a scheme that marks a WRITE 1,1 in the eeprom when the program starts up in a slot, and WRITE 1,0 when it leaves that slot. On power-up the program jumps from slot to slot until it find the "1"=active mark or runs out of slots.

' top of slot 0
top:
  READ 1,result
  IF result=0 THEN RUN 1  ' not this one, try next, same code in slot 1 does a RUN 2, etc.
  ' result is 1, this is the one
  '  program executes here
  ' ...
exitSlot:   ' going to a new slot
  WRITE 1,0   ' mark this one as non-active
  RUN newSlot   ' it will be marked as 1 when it starts

The last slot in the chain would be the default, and would run by default if none are marked with a 1.

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Tracy Allen
www.emesystems.com