Page Comparison

(Integer only) bitwise Bitwise logical AND

(Integer only) Input parameters in HLhlC and DEdeB. Result in HLhlC.

(Integer only) quotient Quotient after division

(Integer only) Input parameters in HLhlC and DEdeB (returns HLhlC / DEdeB). Result in HLhlC.

(Integer only) bitwise Bitwise logical excusive OR

(Integer only) remainder Remainder after division

(Integer only) Input parameters in HLhlC and DEdeB (returns the remainder of HLhlC / DEdeB). Result in HLhlC.

(Integer only) bitwise Bitwise logical OR

Test for less than or equal to

Input parameters in HLhlC and DEdeB (test is HLhlC <= DEdeB). Result in HLhlC (-1 for TRUE; 0 for FALSE).

Test for not equal to

Input parameters in HLhlC and DEdeB. Result in HLhlC (-1 for TRUE; 0 for FALSE).

Test for greater than or equal to

Input parameters in HLhlC and DEdeB (test is HLhlC >= DEdeB). Result in HLhlC (-1 for TRUE; 0 for FALSE).

Test for less than

Input parameters in HLhlC and DEdeB (test is HLhlC < DEdeB). Result in HLhlC (-1 for TRUE; 0 for FALSE).

Test for equality

Input parameters in HLhlC and DEdeB. Result in HLhlC (-1 for TRUE; 0 for FALSE).

Multiplication

Addition

Test for greater than

Input parameters in HLhlC and DEdeB (test is HLhlC > DEdeB). Result in HLhlC (-1 for TRUE; 0 for FALSE).

Subtraction

Input parameters in HLhlC and DEdeB (returns HLhlC - DEdeB). Result in HLhlC.

Raise to power

Input parameters in HLhlC and DEdeB (returns HLhlC ^ DEdeB). Result in HLhlC.

Division

Input parameters in HLhlC and DEdeB (returns HLhlC / DEdeB). Result in HLhlC.

Magnitude (ABSolute value)

Inverse cosine (Arc CoSine)

Inverse sine (Arc SiNe)

Inverse tangent (Arc TaNgent)

Cosine

Convert radians to degrees

Input parameters in HLhlC, in radians. Result in HLhlC, in degrees.

Exponentiation

Integer truncation

Natural logarithm

Common (base 10) logarithm

(Integer only) bitwise Bitwise logical NOT

Convert degrees to radians

Input parameters in HLhlC, in degrees. Result in HLhlC, in radians.

Sign (signum)

Sine

Square root

Tangent

Return the constant zero 

Return the floating point constant 1

Return the integer constant -1

Returns pi

Returns the numeric value of a string

HL points to start of string (null-terminated). Result in HLhlC, and DE points to last character read; if the call succeeded, this will be the terminator byte. If the call failed, HLhlC = 0.

Return string representation of number

Number to convert to string, in in HLhlC.

DE points to space to insert string. DE points to character after string when call returns. The de (alternate) register pair contains a format control variable which has the effect of the two middle bytes of the BBC BASIC format control variable @%:

1. The contents of e determine the maximum number of digits (ie. number of characters apart from decimal point or 'E') to be printed. The allowed range of values depends on the format selected (see below):
   
   1. General format
      
      1. Exponential format: 1-255 (leading zeros added beyond the 10th significant figure).
      2. Fixed format: 0-10 (in this case the number of digits printed after the decimal point).
2. The contents of d determine the format of the resultant string for a given number; the options are:
   1. d=0: General format
      
      1. Integers are printed without a decimal point or exponent. Numbers between 0.1 and 1 will be printed with a decimal point but no exponent. Numbers less than 0.1 will be printed with a decimal point and exponent. Numbers greater than 1 will be printed without exponent unless this would involve more digits than allowed by the contents of the 'e' register (se above), and outside this range, will be printed with an exponent.
   2. d=1: Exponential format
      
      1. All numbers printed in exponential notation, eg. 1.0E0.
   3. d=2: Fixed format
      1. All numbers are printed with a fixed number of decimal places.

Round a number to integer

Input parameters in HLhlC (the call has no effect with C=0). Result in HLhlC.

Convert from integer to floating point

Input parameters in HLhlC (the call has no effect with C<>0). Result in HLhlC.

Test a number for zero and sign

Input parameters in HLhlC. Result in A (0 for zero; $40 for positive; $C0 for negative).

Compare two numeric values

Input parameters in HLhlC (left) and DEdeB (right). Result in A:

• 0 if HLhlC = DEdeB.
• $40 if HLhlC > DEdeB.
• $C0 if HLhlC < DEdeB.

Negate number, ie. result = -input

Execute operation using index number

Perform one of the above functions using the operation index number in A, eg.:

ld  a, 33
fpp FP_BAS

should call FP_ONE and return 1 (floating point). This facility can be useful if the operation depends on some parameter, to avoid writing selfmodifying code.