ZX-TOOLKIT 
instructions in brief

                                                        http://www.zx81.de

First load TOOLKIT or TOOLK64. Both use about 2300 bytes of memory.
TOOLKIT needs a ZX81 with 16K-RAM and will be copied under RAMTOP and then 
RAMTOP will be lowered.
TOOLK64 will be copied in the region 14 - 16K. You must have RAM there.
Both programms will run under ZX81 emulator XTender on a DOS-PC.

Then load your ZX81 programm you want to work with.

Call the functions with RAND USR address or RAND USR variable

variable     address for
          16K  /  64K   version

         30506 / 14122  will define the names of the following variables

RENUM    30524 / 14140  will renumber the whole BASIC-Program
                        you are asked to enter START line and STEP, 
                        even GOSUB and GOTO line-number will be changed

DEL      31155 / 14771  deletes from START to END line number 

MEM      31850 / 15466  shows the memory available

DUMP     31532 / 15148  lists the names of all defined variables and strings (no arrays)

FIND     31233 / 14849  finds strings, to find keywords use THEN keyword, 
                        then delete THEN

REPLACE  31751 / 15367  like FIND, but cannot replace numbers

REMKILL  31062 / 14678  deletes all REM-lines

SAVE     31273 / 14889  saves the BASIC program below RAMTOP 
                        (high line-numbers!!!)

                        then LOAD the second BASIC-program (low line-numbers)

APPEND   31385 / 15001  copies the first loaded BASIC-programm just behind the second one
