Intel 386 User Manual

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
7-20
SetEXRegWordInline(CS2ADL,0x08700); // Enables SRAM as memory
SetEXRegWordInline(CS2ADH,0x3);
SetEXRegWordInline(CS2MSKL,0x07C01);
SetEXRegWordInline(CS2MSKH,0x00);
_asm // Copy SMM_EXAM.BIN code into SRAM
{
mov ax,0x3800 // Starting address for SMM_EXAM file
mov es,ax // to be placed
mov ax,seg SerialWriteStr2 // Address where SMM_EXAM is located
mov ds,ax
mov cx,0x100 // Length of SMM_EXAM file in bytes
mov si,offset SerialWriteStr2
mov di,0
rep movsb
}
SetEXRegWordInline(CS2MSKL,0x7801); // Resets SRAM to enabled in SMM only
_asm // Restore register values
{
pop DI
pop SI
pop DS
pop ES
}
// Loop endlessly and display another serial message
while(1) // Serial Write Loop
{
SerialWriteStr(SIO_PORT,SMMString);
}
}
/**************************** END MAIN **********************************/

Intel 386 Specifications

General

Architecture	x86
Clock Speed	12 MHz to 40 MHz
Transistor Count	275, 000
Data Bus Width	32-bit
Address Bus Width	32-bit
Instruction Set	x86
Introduced	1985
Maximum Memory	4 GB
Operating Modes	Real mode, Protected mode, Virtual 8086 mode
MMU	Yes
Voltage	5V
Model	Intel 386
Package	PGA
Process	1.5 μm to 1 μm