Dear User

This little package has served me well. It does almost all of the 
arithmetic, I/O and formatting for several packages that I've 
written. It is thoroughly de-bugged. The source is in 8080 code
and will assemble under ASM. 

To use the Package, load it in with: DDT RUNPAC.HEX or use a 
program that moves the code to the area between 0B000H and 0B79EH. 
SETUP.COM is such a program. SYS.COM can only run if RUNPAC is 
present at 0B000H. 

RUNPAC.DOC decribes each of the Functions. After some practice, I 
now find this method of programming easier and clearer than any 
'higher level language' I've used. It is efficient and runs very 
fast. 

Although the arithmetic is Integer, you can assume that a decimal 
point is used and normalize before adding or subtracting. Trig, 
Exponential and Log functions may be calculated by implementing the 
appropriate Series. If the decimal point has to really 'float', one 
should use a Floating Point Package, however. 

Dennis Baker


P.S.  The Divide Routine normally clears the high 4 bytes of the 
Accumulator (HIACC) before starting. If a Multiplication Product 
exceeds 4 bytes and you want to normalize by dividing, load the 
OPERAND with the Divisor then CALL the following Routine (shown in 
8080 code). 


      LONGDV:  SUB   A
               PUSH  PSW         ;push status
               JMP   INTDIV+3


The result in ACC will be that of Dividing the 4 byte OPERAND into 
an 8 byte Accumulator. The Remainder will be in HIACC.