Motorola M6800 manual

Page 22

MPU-22

First lets prove that 758 & 1111012 are really equal to 6110.

758 = 5x80+ 7x81

=5x1 + 7x8

=5 + 56

=6110

1111012 = 1x20 + 0x21 + 1x22 + 1x23 + 1x24 + 1x25

= 1x1

+ 0x2

+ 1x4

+ 1x8

+ 1x16

+ 1x32

= 1

+ 0

+ 4

+ 8

+ 16

+ 32

= 6110

 

 

 

 

 

Notice that if we take the base 8 number of 75 and convert each

digit to base 2, we have the same number as when we converted the base 10

number to base 2. i.e.

Convert 7 to base 2

2

2

2

3

R=1

 

7

 

1

R=1

 

3

 

0

R=1

1112

1

2

2

2

 

Convert 5 to base 2

2

R=1

 

5

 

1

R=0

 

2

 

0

R=1

1012

1

Image 22
Contents MPU-1 Introduction MPU-2 MPU-3 MPU-4 MPU-5 BIT N0 Function MPU-7 READ/WRITE R/W Data BUS EnabledbeMPU-8 Valid Memory AddressvmaMPU-9 NON-MASKABLE InterruptnmiBUS Available BA THREE-STATE Control TSC Address BUS AO/A15ADC ABAINS INXPage MPU-14 Summary of MPU Operation Reset Sequence IRQ Sequence NMI Sequence RTI ExecutionSWI Instruction Page Page Page Page Page Page Page Page