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<table>
<tbody>
<tr><td></td><td>No swap partition</td><td>An application attempted to access a swap partition, but couldn’t find one. Create a new swap partition with .<b>MKSWAP</b> and try again.</td></tr>
<tr><td></td><td>Not bootable</td><td>An attempt has been made to boot a disk image without a boot sector or boot program.</td></tr>
<tr><td></td><td>Not implemented</td><td>An attempt was made to access a facility which isn’t available.</td></tr>
<tr><td>RIC</td><td>Not ready</td><td>The storage device was not ready. This usually happens because it has been removed.</td></tr>
<tr><td></td><td>Out of handles</td><td>There aren’t enough handles left to perform the current operation. Unmap a drive and try again.</td></tr>
<tr><td></td><td>Partition open</td><td>The partition you are trying to delete or map is already mapped to a drive.</td></tr>
<tr><td>RIC</td><td>Read only</td><td>An attempt has been made to write to a file or storage device which is read-only or has been write-protected.</td></tr>
<tr><td>RIC</td><td>Seek fail</td><td>The device is unable to locate the sector that has been requested. If this error persists it may indicate that the device or disk image is faulty.</td></tr>
<tr><td></td><td>Too big</td><td>An attempt has been made to write a file that is too large for the filesystem (greater than 8MB for +3DOS filesystems, 2GB on FAT16 or 4GB on FAT32).</td></tr>
<tr><td>RIC</td><td>Unsuitable media</td><td>The device or disk image is formatted in a way that cannot be handled.</td></tr>
<tr><td>b</td><td>Wrong file type</td><td>Trying to <b>LOAD</b> a file of the wrong type (eg trying to load a <b>CODE</b> file as a <i>NextBASIC</i> program).</td></tr>
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</table>

### NextBASIC Keywords and Functions

The following is a list of all *NextBASIC* keywords in alphabetical order with a short description regarding their function.

| Keyword | Meaning |
|---|---|
| **BANK 1346 FORMAT** | Reserve banks 1,3,4,6 for use by the RAMdisk again. |
| **BANK 1346 USR** | Allow banks 1,3,4,6 to be used by the BANK command. |
| **BANK** m **COPY TO** n | Copy the contents of bank m to bank n |
| **BANK** m **DPOKE** o, list... | Double POKE a sequence of comma-separated values starting at offset o in bank m. |
| **BANK** m **ERASE** [o, **l**,] [v] | Fill bank m's optional l bytes (all if not specified) at optional offset o (0 if not specified) with value (zero is used if value not specified). |
| **BANK** m **CLEAR** | Marks bank m as free for use by other parts of the system. |
| **BANK** m **COPY** o, l **TO** n,o2 | Copy l bytes starting at offset o in bank m to offset o2 in bank n. |
| **BANK** m **GOSUB** n | GOSUB line n in bank m. To GOSUB the main program from a banked section, use m=255. See also RETURN and GOSUB. |
| **BANK** m **GOTO** n | GOTO line n in bank m. To GOTO the main program from a banked section, use m=255. |
| **BANK** m **LAYER** o\|x,y,w,h **TO** [rop] x,y,w,h\|o | Copies data to \| from the screen (in the current mode) from \| to offset in bank m. [rop] is an optional symbol modifier which affects how the data is copied. |
| **BANK** m **LINE** x,y | Copies lines x to y inclusive from the main program to bank m. |
| **BANK** m **LIST** [n\|**PROC** name()] | List lines (optionally from line n or procedure named name) in bank m. |
| **BANK** m **MERGE** | Copy all lines back from bank m into the main program. |
| **BANK** m **POKE** o, list... | POKE a sequence of comma-separated values starting at offset o in bank m. |
| **BANK** m **PROC** name ([expressionlist]) [**TO** paramlist] | Call a procedure in bank m. To call a procedure in the main program from a banked section, use n=255. See also DEFPROC. |
| **BANK** m **RESTORE** n | Set the DATA pointer to line n in bank m |
| **BANK NEW** var | Reserves the next available free bank number and assigns it to the numeric variable var |
| **BEEP** x, y | Sounds a note through the loudspeaker for x seconds at a pitch y semitones above middle C (or below if y is negative). |
| **BORDER** m | Sets the colour of the border of the screen. |
| **BRIGHT** n | Sets brightness of characters subsequently printed. n=0 for normal, 1 for bright. 8 for transparent.Error K if n not 0, 1 or 8 |
| **CAT** [#n,] [[filespec [EXP]]\|**TAB**\|**ASN**] | Produces an alphanumerically sorted catalog of files on screen or to an optional stream n from the default drive or according to the optional filespec in standard or EXPanded form. With the optional TAB and ASN modifiers produces information regarding partitions and drive letter assignments. |
| **CD** filespec | Change the current drive and/or directory to the one specified in filespec. |
| **CIRCLE** x, y, z | Draws an arc of a circle, centre (x,y), radius z |
| **CLEAR** [n] | Deletes all variables, freeing the space they occupied. Does RESTORE and CLS, resets the PLOT position to the bottom left-hand corner and clears the NextBASIC Return stack. Optional address n attempts to change the RAMTOP to that address |
| **CLOSE** #n | Marks stream n as being unattached to any channel. |
| **CLS** | (Clear Screen). Clears the display of the current layer |
	No swap partition	An application attempted to access a swap partition, but couldn’t find one. Create a new swap partition with .MKSWAP and try again.
	Not bootable	An attempt has been made to boot a disk image without a boot sector or boot program.
	Not implemented	An attempt was made to access a facility which isn’t available.
RIC	Not ready	The storage device was not ready. This usually happens because it has been removed.
	Out of handles	There aren’t enough handles left to perform the current operation. Unmap a drive and try again.
	Partition open	The partition you are trying to delete or map is already mapped to a drive.
RIC	Read only	An attempt has been made to write to a file or storage device which is read-only or has been write-protected.
RIC	Seek fail	The device is unable to locate the sector that has been requested. If this error persists it may indicate that the device or disk image is faulty.
	Too big	An attempt has been made to write a file that is too large for the filesystem (greater than 8MB for +3DOS filesystems, 2GB on FAT16 or 4GB on FAT32).
RIC	Unsuitable media	The device or disk image is formatted in a way that cannot be handled.
b	Wrong file type	Trying to LOAD a file of the wrong type (eg trying to load a CODE file as a NextBASIC program).