IBM 770 manual viii

2-30.	System	Control	Port	A	(Hex .0092). . . . . . . .2.-30
2-31.	System	Control	Port	B	(Hex 0061,. .Write). . . . 2-31
2-32.	System	Control	Port	B	(Hex 0061,. Read). . . . . 2-31
2-33.	Error Codes . . . .				. . . . . . . .2-35
3-1.	BIOS Video VGA Modes. . . . . . . . . . . . . .3-.3 . .
3-2.	Video BIOS Extended Modes—Trident. .9397. . . .3-4
3-3.	PCMCIA	PC Card	Slot	Pin	Assignments. . . . . . .3-12

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