376 datasheet(8/95 Pages) INTEL

8 / 95 page

376 EMBEDDED PROCESSOR

General Registers

The eight 32-bit general pur-

pose registers are used to contain arithmetic and

logical operands Four of these (EAX EBX ECX and

EDX) can be used either in their entirety as 32-bit

registers as 16-bit registers or split into pairs of

separate 8-bit registers

Segment Registers

Six 16-bit special purpose reg-

isters select at any given time the segments of

memory that are immediately addressable for code

stack and data

Flags and Instruction Pointer Registers

These

two 32-bit special purpose registers in Figure 21

record or control certain aspects of the 80376 proc-

essor state The EFLAGS register includes status

and control bits that are used to reflect the outcome

of many instructions and modify the semantics of

some instructions The Instruction Pointer called

EIP is 32 bits wide The Instruction Pointer controls

instruction fetching and the processor automatically

increments it after executing an instruction

Control Register

The 32-bit control register CR0

is used to control Coprocessor Emulation

System Address Registers

These four special

registers reference the tables or segments support-

ed by the 8037680386 protection model These ta-

bles or segments are

GDTR (Global Descriptor Table Register)

IDTR (Interrupt Descriptor Table Register)

LDTR (Local Descriptor Table Register)

TR (Task State Segment Register)

Debug Registers

The six programmer accessible

debug registers provide on-chip support for debug-

ging The use of the debug registers is described in

Section 211 Debugging Support

EFLAGS REGISTER

The flag Register is a 32-bit register named

EFLAGS

The defined bits and bit fields within

EFLAGS shown in Figure 22 control certain opera-

tions and indicate the status of the 80376 processor

The function of the flag bits is given in Table 21

240182 – 3

240182 – 4

240182 – 5

Figure 22 Status and Control Register Bit Functions

376 Datasheet(PDF) 8 Page - Intel Corporation

376 Datasheet(HTML) 8 Page - Intel Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95

Datasheet Download

Link URL