HP 48gII Graphing, 50g Graphing manual DReg=hh

Syntax	Example	Notes
DReg=hh	D0=AD	Change the first 2, 4 or all nibbles of the Data register with the given value
DReg=hhhh	D0=0100
DReg=hhhhh	D0=80100
DReg=(2)Exp	D0=(2)label
	D0=(4)lab+$10
DReg=(4)Exp
	D1=(5)Variable
DReg=(5)Exp
Dreg=Reg	D0=A	Reg can only be A or C
Dreg=RegS	D0=CS	Sets the first 4 nibbles of Dreg with the 4 first nibbles of Reg
		Reg can only be A or C
RegDRegEX	AD0EX	Reg can only be A or C
RegDRexXS	AD1XS	Exchange the first 4 nibbles of Dreg with the 4 first nibbles of Reg
		Reg can only be A or C
DReg=DReg+Cst	D0=D0+12	Note 1: The Saturn processor is not able to add a constant greater than 16
DReg+Cst	D1+25	to a register, but if cst is greater than 16, MASD will generate as many
DReg=DRegCst	D1=D112	instructions as needed.
DRegCst	D15	Note 2: Even if adding constants to a register is very useful, big constants
		should be avoided because they will slow down execution, and generate a
		big program.
		Note 3: After adding a constant greater than 16, the carry should not be
		tested.
		Note 4: You can put an expression instead of the constant (MASD must be
		able to evaluate the expression right away). If the expression is negative,
		MASD will invert the addition to a subtraction and vice versa.
		Note 5: Be careful when using subtraction; it’s easy to be misled. D056.A
		is equivalent to D0+1.A, not D011.A

Please read the section on test above for information on what MUST follow a test instruction. f can NOT be a Fn field.

?Reg1=Reg2.f

?Reg1#Reg2.f

?Reg=0.f

?Reg#0.f

?Reg1<Reg2.f

?Reg1>Reg2.f

?Reg1<=Reg2.f

?Reg1>=Reg2.f

?RegBIT=0.a

?RegBIT=1.a

?A=C.B

?A#C.A

?A=0.B

?A#0.A

?A<B.X

?C>D.W

?A<=B.X

?C>=D.W

?ABIT=0.5

?ABIT=1.number

A=PC

C=PC

PC=A

PC=C

APCEX

CPCEX

PC=(A)

PC=(C)

SB=0

XM=0

SR=0

MP=0

HST=0.a

?SB=0

?XM=0

?SR=0

?MP=0

?HST=0.a

The HP ≠ character can also be used

The HP ≠ character can also be used

The HP ≤ character can be used

The HP ≥ character can be used

Test if a specific bit of A or C register is 0 or 1

Reg must be A or C

Sets Aa or Ca to the address of the next instruction

Set PC to the value contained in Aa or Ca

Exchange the value of PC with register Aa or Ca

Sets PC to the value read at the address contained in Aa or Ca

SB, XM, SR and MP are 4 bits in the HST register. They can be set to 0 by the specific instruction and tested.

SB is set to 1 by RegSR and RegSRB instruction, XM by RTNSXM instruction and SR and MP should always be 0 (hardware related stuff). HST=a sets all bits set to 1 in a to 0 in the HST register.

?HST=a test that all bits set to 1 in a are 0 in the HST register

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