FAR PCHL: as RST 3, but HL has address;

C has ROM select

RST 4: RAM LAM: LD A,(HL) from RAM with ROMs disabled

FAR CALL: as RST 3, but HL has address of three byte address block

RST 6: User restart; default to RST 0

Program area;

Variables and DEF FNs area;

Arrays area;

Free space;

end of free space;

Strings area;

end of Strings area (=HIMEM);

Space for user machine code routines;

end of user space, byte before user;

sequence of Disc Block numbers containing file – &00 as end marker

number of 128 byte records loaded so far; before loading proper: &00 for ASCII (ie nothing loaded yet); &01 for BIN or BAS files (ie header record loaded)

Copy of current or last Disc Directory entry for OPENOUT/SAVE:

File extension ($$$ while open; correct extension when finished)

sequence of Disc Block numbers containing file – &00 as end marker

flag (&00=OPENIN; &01=In Char; &02=In Direct (whole file))

address of 2K buffer for ASCII, or of start of current/last block if BIN or BAS file

address of next byte to read for ASCII, or of 2K buffer for BAS or BIN file

first #45 bytes of BAS/BIN file (extended header) or of extended header made for ASCII file

file type (&00=BASIC; &01=protected BASIC; &02=Binary; &16=ASCII)

address to load file into (=actual destination), or buffer for an ASCII file

simple checksum of first 67 bytes of header (LB first) – BAS and BIN only

flag (&00=OPENOUT; &01=Out Char; &02=Out Direct(whole file))

address of 2K block if an ASCII file, or of current/last block saved if a BAS or BIN file

address of next byte to write for ASCII files, or of 2K buffer for BAS and BIN files

file type (&00=BASIC; &01=protected BASIC; &02=Binary; &16=ASCII)

address to save file from (for BAS or BIN files), or of buffer for ASCII files

length of actual file in bytes (as at &A7B7) – BAS and BIN only

simple checksum of first 67 bytes of header (LB first) – BAS and BIN only

buffer area for records sent to or loaded from Disc, or used in forming filename and extension

Tape Jumpblock is stored here by AMSDOS – is moved to &BC77 etc after |TAPE

far address used by AMSDOS RST 3s at &BC77 etc (&CD30,&07)

bit signiflcant value of number of blocks for directory (&0080=1; &00C0=2)

number of reserved tracks (&00=Data; &01=IBM; &02=System)

Drive B Extended Disc Parameter Block (arranged as at &A890)

program line redundant spaces flag (0=keep extra spaces; <>0=remove)

number of the next line (6128) or of the current line (464) for AUTO

FOR start value (real). Only 2 bytes are used if % or DEFINT variable

address of `: ‘ or of the end of program line byte after a NEXT command

address of location holding ROM routine address for KB event block

chain address to next event block; &0000 if last in chain, but &FFFF if unused

class: Far address, highest (ON SQ) priority, Normal & Synchronous event

ROM Select number (&FD ie ROM 0 enabled, Lower ROM disabled)

address of the end of program line byte or `:’ after `ON SQ(x) GOSUB line number’ statement

address of the end of program line byte of the line before the GOSUB routine

Event block for ON SQ(2), arranged as #AC1E onwards – second ON SQ priority

Event block for ON SQ(4), arranged as &AC1E onwards – lowest ON SQ priority

chain address to next event block (usually to another timer or &00FF)

class: Far address, lowest (timer) priority, Normal and Synchronous event

ROM Select No (&FD ie ROM 0 enabled, Lower ROM disabled)

address of the end of program line byte or `:’ after statement in use when the timer `timed-out’

address of tbe end of program line byte of tbe line before the GOSUB routine

Ticker and Event Block for AFTER/EVERY Timer 1 (3rd Timer priority) arranged as at &AC42

Ticker and Event Block for AFTER/EVERY Timer 2 (2nd Timer priority) arranged as at &AC42

Ticker and Event Block for AFTER/EVERY Timer 3 (highest priority) arranged as at &AC42

BASIC input area for lines (as typed in and not tokenised) or for INPUT

address of byte before statement containing error – ie of `:’ or of HB of Line No

as &AD8E if error is in a program (ie not if in Direct Command Mode)

as &AD8C if error is in a program (ie not if in Direct Command Mode)

address of the length LB of line specified by the `ON ERROR GOTO’ command