User`s manual

System 2800 User's Manual
4.8 Interrupts
For the benefit of systems programs, we have changed the way that CP/M
deals with interrupts. In Vector Graphic CP/M 2.x, if a user program
enables interrupts, then CP 1M will leave them enabled, except for very short
periods during disk access.
4.9 Formatting new disks
As explained in Section 2, you may want a disk that does not have CP 1M on
it, but only has desired program or data files. Before saving such files on
such a disk, you have to "for:mat" the disk. Remember, however: you do Nor
have to fonnat a disk before backing up an ENTIRE disk onto it using the
BACKUP/8 utility.
'Ib fonnat a disk, make sure you have a Vector Graphic CP/M 2.x System
Disk in the drive that is logged in, usually drive A. Put the disk you want
to fonnat in one of the other drives. '!hen, following the CCP A> prompt,
tyPe FORMAT/8 (return). You will see on the screen:
VEcroR GRAmIC FOR1AT for 8 inch disks. V1.x
SELECT UNIT 'IO BE FDRMATED (A,B,C, OR D) :
Enter the letter for the drive containing the disk you want for:matted. Make
sure you do not enter the letter of the drive containing the CP/M System
Disk. You will next see on the screen:
1.) SINGLE IENSITY
2.) roUBLE DENSITY
3.) CHANGE IRIVE
4.) RETURN 'IO CP 1M
SELECT CCMMAND FRCM ABOVE (1-4)
Type the number of the canmand you wish to implement. The program will then
display:
INSERT BLANK DISK AND PRESS RETURN -
Make sure the blank disk with the write enable tab affixed is in the desired
drive, then press the (return) key. 'Ihe program will confirm the choices
you have made by displaying a message such as:
FORMA'ITING DRIVE B IN roUBLE IENSITY
Several minutes will go by. wnen completed, the system will either report,
Rev. l-C 8/15/80
4-9