DMP Electronics eBOX-3350MX-AP Manual de usuario descargar pdf (Pagina 69)

386SX Single Chip PC Jan Yin Chan Electronics Co.,LTD.

DM&P M6117D : System on a chip

Page 68

Jan Yin Chan Electronics Co,. LTD. M6117D 386SX Single Chip PC

8F-1,No.22,Wuchyuan 2RD.,Hsin Chuang city Taipei Hsien, Taiwan, R.O.C. Tel: 886-(02) 2298-0770 Fax: (02) 2299-1883

Example 5 : SMM Remap Start Address

LPORTW(0x20,0xB0); /* Remap start address to F region, no shadow */

MOV eax, 000F0000h /* start address = 000F0000 */

DB 0D6h,0CAh,03h,0A0h /* Load EA0 to ultra SR register*/

DB 0D6h,0C8h,03h,0A0h /* Load ultra SR register to EA0 */

DB 0F1h /* BRKPM, instruction to enter SMM mode */

LPORTW(0x20,0x90); /* Remap start address to AB region, shadow */

mov eax, 000A0000h /* start address = 000A0000 */

DB 0D6h,0CAh,03h,0A0h /* Load EA0 to ultra SR register*/

DB 0D6h,0C8h,03h,0A0h /* Load ultra SR register to EA0 */

DB 0F1h /* BRKPM, instruction to enter SMM mode */

LPORTW(0x20,0xA0); /* Remap start address to E region, shadow */

mov eax, 000E0000h /* start address = 000E0000 */

DB 0D6h,0CAh,03h,0A0h /* Load EA0 to ultra SR register*/

DB 0D6h,0C8h,03h,0A0h /* Load ultra SR register to EA0 */

DB 0F1h /* BRKPM, instruction to enter SMM mode */

LPORTW(0x20,0xB8); /* Remap start address to F region, shadow */

mov eax, FFFF0000h /* start address = FFFF0000 */

DB 0D6h,0CAh,03h,0A0h /* Load EA0 to ultra SR register*/

DB 0D6h,0C8h,03h,0A0h /* Load ultra SR register to EA0 */

DB 0F1h /* BRKPM, instruction to enter SMM mode */

Example 6 : Stop Internal CPU Clock

mov eax, 00080000h /* Set Power Control Register Clock Stop Bit = 1 */

DB 0D6h,0FAh,03h,02h /* MOV PWRCR, EA0 , where PWRCR is Power control register*/

hlt /* Stop internal CPU clock */

/* Wake up by INTR, NMI */

5.7 Flowcharts

Note

: The following notations below have the following meanings.

HAi (where I is an integer) denotes a specific CPU address.

HAi[j] denotes the jth bit of the address lines HAi.

Ai & HAi[j] = K denote the specific address Hai is with a binary value K assigned to the jth bit.

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 111 112

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DMP Electronics eBOX-3350MX-AP Manual de usuario Pagina 69