MCS11 datasheet(88/108 Pages) PADAUK

88 / 108 page

MCS11

ADC-Type Enhanced FPPA

TM Controller

Page 88 of 108

PDK-DS-MCS11_v020 – Apr. 20, 2018

idxm

a, index

Move data from specified memory to ACC by indirect method. It needs 2T to execute this

instruction.

Example:

idxm

a, index;

Result:

a ← [index], where index is declared by word.

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

Application Example:

-----------------------------------------------------------------------------------------------------------------------

word

RAMIndex ;

// declare a RAM pointer

…

mov

a, 0x5B ;

// assign pointer to an address (LSB)

mov

lb@RAMIndex, a ;

// save pointer to RAM (LSB)

mov

a, 0x00 ;

// assign 0x00 to an address (MSB), should be 0

mov

hb@RAMIndex, a ;

// save pointer to RAM (MSB)

…

idxm

a, RAMIndex ;

// mov memory data in address 0x5B to ACC

------------------------------------------------------------------------------------------------------------------------

Idxm

index, a

Move data from ACC to specified memory by indirect method. It needs 2T to execute this

instruction.

Example:

idxm

index, a;

Result:

[index] ← a; where index is declared by word.

Affected flags: 『N』Z

『N』C

『N』AC

『N』OV

Application Example:

------------------------------------------------------------------------------------------------------------------------

word

RAMIndex ;

// declare a RAM pointer

…

mov

a, 0x5B ;

// assign pointer to an address (LSB)

mov

lb@RAMIndex, a ;

// save pointer to RAM (LSB)

mov

a, 0x00 ;

// assign 0x00 to an address (MSB), should be 0

mov

hb@RAMIndex, a ;

// save pointer to RAM (MSB)

…

mov

a, 0xA5 ;

idxm

RAMIndex, a ;

// mov 0xA5 to memory in address 0x5B

------------------------------------------------------------------------------------------------------------------------

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