PS081 datasheet(116/155 Pages) AMSCO

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6-13

PSØ81

decramadr

Decrement RAM address pointer

Syntax:

decramadr

Parameters:

Calculus:

Flags affected:

Bytes:

Cycles:

Description:

Decrement RAM address pointer by one

Category:

Ram Access

dez2lcd

Decimal to segment code

Syntax:

dez2lcd p1

Parameters:

p1 = ACCU [x,y,z,r]

Calculus:

Flags affected:

Bytes:

Cycles:

Description:

Converts decimal code in register p1 to 7 segment code. A decimal number from 0

to 9 of the addressed register p1 is converted to standard 7 segment code (digits

a-h). This opcode may be used for advanced LCD conversions routines, where op-

code no2lcd is not sufficient

dec

hgfe dcba

0 --> 0b00111111=0x3F

1 --> 0b00000110=0x06

2 --> 0b00111011=0x3B

3 --> 0b01001111=0x4F

4 --> 0b01100110=0x66

5 --> 0b01101101=0x6D

6 --> 0b01111101=0x7D

7 --> 0b00000111=0x07

8 --> 0b01111111=0x7F

9 --> 0b01101111=0x6F

Category:

LCD Display

div24

Signed division 24 Bit

Syntax:

div24 p1,p2

Parameters:

p1 = ACCU [x,y,z,r]

p2 = ACCU [x,y,z,r]

Calculus:

p1 := ( p1 << 24 ) / p2 (if |p1| < |p2/2| )

Flags affected:

S & Z of p1

Bytes:

Cycles:

Description:

Signed division of 2 registers

24 bits of the division of 2 registers, result is assigned to p1

Category:

Complex arithmetic

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