цOMMAND: сетрам (реу+ MODIFICATIONS BY бRUCE жRIELING) сEE ALSO: рдофф,рдир,гетрам,рамдиск,путрам,инсталл,реможе сYNTAX: SETRAM BANK,ADDRESS OR SETRAM 1750BANK+1,NUMBERєOFє1750єBANKS ***ноте*** тHE CODE WITHIN THE сетрам MODULE AND A LARGE PORTION OF THIS DOCUMENTATION IS (ц) пARSEC. и DID NOT WRITE THIS MODULE; и ONLY MODIFIED IT TO TAKE ADVANTAGE OF THE EXTRA MEMORY IN EXPANDED реу'S. и CONSIDER MY CHANGES TO STILL FALL UNDER пARSEC'S COPYRIGHT, AND DISTRIBUTE THE CODE FOR THIS MODULE ONLY UNDER THE SAME CONDITIONS AS THOSE OF цс-дос ITSELF. ***енд ноте *** фUNCTION: сетрам ALLOCATES A PORTION OF THE ц128'S INTERNAL рам OR A PORTION OF THE 17XX рам EXPANSION CARTRIDGE AS A рам DISK. аNY PROGRAMS TRANSFERRED FROM FLOPPY TO THE рам DISK WILL BEHAVE LIKE BUILT IN COMMANDS. иF YOU'RE FAMILIAR WITH мс-дос, ITS AS IF THE рам DISK WAS THE ONLY DIRECTORY ON YOUR патх. иF YOU HAVE MORE THAN ONE DRIVE, AND YOU DON'T MIND TYPING A DRIVE LETTER BEFORE EACH COMMAND, YOU CAN GET BY WITHOUT EVER INSTALLING A рам DISK. аLL COMMANDS CAN BE RUN EITHER FROM DISK OR FROM THE рам DISK. иF YOU HAVE A 1750, INSTALL THE рам DISK IN THE 1750 (SEE BELOW) AND IGNORE THESE NEXT FEW PARAGRAPHS. иF YOU DO NOT HAVE A рам EXPANSION CARTRIDGE, THEN THE BEST STRATEGY IS TO INSTALL A SMALL 8 OR 12к рам DISK IN BANK 1 FOR THE SHORTER, FREQUENTLY USED COMMANDS, AND RUN THE LARGER ONES LIKE арц FROM DISK. тHE 1571 GETS THE COMMAND INTO рам PRETTY FAST, SO ITS NOT WORTH TYING UP THE рам. тHE рам DISK CAN BE INSTALLED IN ANY OF BANKS 0 THROUGH 11. и DON'T KNOW WHAT цOMMODORE HAS PLANNED FOR BANKS 2 AND 3, BUT FOR THE TIME BEING AVOID THEM SINCE сетрам WON'T ADJUST ANY басиц POINTERS WHEN INSTALLING A рамDISK IN ONE OF THESE BANKS. (BANK 2 IS REALLY BANK 0 AND BANK 3 IS BANK 1) бANKS 4 THROUGH 11 ARE INTERNAL AND EXTERNAL ром. иF YOU HAVE ACCESS TO AN епром BURNER, YOU MAY WANT TO STICK YOUR рам DISK IN ONE OF THESE BANKS. аS FAR AS THE COMMAND LINE INTERPRETER IS CONCERNED, THERE IS NO DIFFERENCE BETWEEN A рам DISK AND A ром DISK, SO YOU CAN FIDDLE AROUND WITH THINGS IN рам, AND WHEN YOU LIKE WHAT YOU SEE, JUST путрам TO A DISKFILE AND BURN IT INTO AN епром. мORE LIKELY, YOU'LL BE INSTALLING YOUR рам DISK IN EITHER BANK 1 OR BANK ZERO. тHERE ARE A COUPLE OF THINGS TO THINK ABOUT. сOME OF THE COMMANDS (арц, може AND цопы FOR NOW) USE BANK 1 AS AN INPUT/OUTPUT BUFFER. тHE BUFFER STARTS WHERE THE дос SHELL ENDS ($4000) AND GOES UP TO WHATEVER ADDRESS IS SET AS басиц'S TOP OF рам (I.E THE START OF YOUR рам DISK IF IT'S IN BANK 1). иF THE рам DISK GETS TOO BIG, THE BUFFER GETS TOO SMALL, AND THERE WILL BE MORE DISK HEAD MOVEMENT ON SINGLE DRIVE SYSTEMS. бANK 0 ISN'T A VERY GOOD PLACE TO STICK THE рам DISK. иT'S A LOT EASIER TO WRITE PROGRAMS TO RUN IN BANK ZERO, SO ITS MORE LIKELY TO GET CLOBBERED BY SOME APPLICATION. арц NEEDS рам UP TO $ц000 (49152) IN BANK ZERO, SO IF YOU PLAN TO USE арц THAT'S THE LOWEST ADDRESS YOU CAN SELECT. (NONE OF THE COMMANDS USE рам ABOVE $ц000, SO IF THAT'S ENOUGH YOUR рам DISK WILL BE REASONABLY SAFE HERE) и WILL TRY TO LEAVE $ц000 AND ABOVE ALONE IN EITHER BANK, BUT IN SOME CASES (лха FOR EXAMPLE) THAT JUST ISN'T POSSIBLE. нO MATTER WHAT BANK YOU'RE IN, THE ABSOLUTE LOWEST ADDRESS YOU CAN START YOUR рам DISK AT IS $4000 (16384). тO STICK IT IN THE 1750 THE SYNTAX IS... SETRAM 1ST-BANK,#-OF-BANKS ...WHERE BANKS 16, 17...47 CORRESPOND TO THE 1750 BANKS 0, 1...31. нOTE THAT A SINGLE RAMDISK CANNOT BE LARGER THAN 512к, OR 8 BANKS. тHUS.. SETRAM 16,8 WOULD USE THE FIRST 512к OF AN реу, SETRAM 22,2 WOULD USE ONLY THE LAST TWO BANKS OF THE FIRST 512к, AND SETRAM 24,4 WOULD USE THE FIRST 4 BANKS афтер THE INITIAL 512к (ONLY ON реу+ DEVICES). ыOU CAN HAVE MORE THAN ONE рамDISK IF YOU WANT, BUT ONLY ONE CAN BE ACTIVE AT A GIVEN TIME. бECAUSE OF THE LENGTH OF TIME THAT IT TAKES TO LOAD A LARGE рам DISK INTO THE 1750, сетрам DOES NOT INITIALIZE THE рамDISK. тHIS MEANS THAT WHATEVER HAPPENS TO BE THERE IN THE 1750 IS ASSUMED TO BE A VALID рам DISK. тHE AUTOEXEC FILE SUPPLIED WITH цс-дос TRIES TO DETERMINE IF THE рам DISK IS IN FACT VALID BY ATTEMPTING TO RUN цс-дос'S иф COMMAND. иF THE иф COMMAND IS THERE, THEN PRESUMABLY THE рам DISK IS INTACT AND WE CAN SAVE SOME TIME BY NOT HAVING TO LOAD IT FROM DISK. иF YOU DO WANT TO INITIALIZE THE рам DISK, THERE ARE TWO WAYS TO DO IT. оNE IS TO USE гетрам TO LOAD A PREVIOUSLY PREPARED рам DISK. тHE OTHER IS TO USE басиц'S STASH COMMAND TO STORE TWO ZEROS WHERE THE рам DISK BEGINS. ыOU WOULD NEED TO DO THIS IF YOU WERE TO BUILD UP A NEW рам DISK FROM SCRATCH. фOR EXAMPLE, THIS WOULD ESTABLISH A рам DISK IN THE 1750'S BANK 0 AND INITIALIZE IT. SETRAM 16,1 POKE 4864,0:POKE 4865,0 STASH 2,4864,BANK,0 вHERE BANK IS THE FIRST BANK OF THE 1750 USED BY THE рам DISK. (IN THIS CASE 0) еXAMPLES: A:SETRAM 1,$B000 INSTALL рам DISK IN BANK 1 AT 45056 A:SETRAM 0,49152 INSTALL рам DISK IN BANK 0 AT $ц000 A:SETRAM 8 $4000 рам DISK IS IN A CARTRIDGE. иF WHAT IS IN THE CARTRIDGE IS NOT A рам DISK, THEN RESULTS WILL BE UNPREDICTABLE. A:SETRAM 16,1 уSE ONLY THE 1ST BANK OF THE 17XX реу A:SETRAM 24,8 уSE BANKS 8-15 OF AN реу+. A:SETRAM 43,4 уSE BANKS 27-31 OF AN реу+.