Telephony Modem Function, Subsystems | IBM 770 guide

Telephony (Modem) Function

I/O Address	IRQ	Level		DMA	Channel

0220–0233	(default)	IRQ	5 (default)DMA		0
0240–0253		IRQ	7	DMA	1 (default)
0260–0273		IRQ	10	DMA	6
0280–0293		IRQ	11	DMA	7
0388–038B	(synthesizer)

Telephony (Modem) Function

The telephony (modem) function provides the following settings:

Serial Port

COM1 (I/O: 03F8 - IRQ 4)

COM2 (I/O: 02F8 - IRQ 3) (default)

COM3 (I/O: 03E8 - IRQ 4)

COM4 (I/O: 02E8 - IRQ 3)

3-6 Subsystems

Image 64

IBM 770 manual Telephony Modem Function, Subsystems

Contents

05L1739 S05L-1739-00 First Edition Contents System Overview Section 3. Subsystems Appendix ASystem Resources Appendix B. System Management API SMAPI Index ManagementPage Figures SupplyMaximum Assignments viii Preface x Preface Section 1. System Overview computer Description1-2 System Overview System Board Devices and Features IBM Personal System/2 Hardware Interface Technical Referenceboard devices and their features. The lists the 1-4 System Overview Figure 1-2 Part 2 of 2. System Board Devices and Features System Board I/O Address Map Figure 1-3 is the I/O address map Address 1-6 System OverviewDevice Performance Specifications Specifications1-4. Performance Specifications Physical Specifications 1-8 System Overview 1-6. Electrical Specifications Electrical Specifications1-7. Acoustical Readings Voltages Power Supply1-10 System Overview Power Supply Connector Battery PackOutput Protection Voltage Sequencing 1-12 System Overview Figure 1-10. Lithium-ion Battery Pack Specifications Section 2. System Board Cache Memory Operation MicroprocessorSystem Board Bus Adapter Address Keyboard/Mouse Connector SignalsConnector 2-4 System Board Scan Codes HardwareInterface Technical Keyboard ID 2-6 System Board Displayable Characters and Symbols Hard Disk Drive Connector 2-8 System Board External Signal Name 2-10 System BoardType Signal Name UltraBay 2-12 System Board Feature SignalI/O and 2-14 System Board Diskette Drive and Controller 2-9. Diskette DriveRead Write Memory ROM SubsystemRAM Subsystem 2-16 System Board System Memory Map System Board Memory for the DIMM Connectors 2-18 System Board RT/CMOS RAM Address NMI Mask Register Hex Bits0071 2-20 System Board Operations RAM I/ORT/CMOS 2-22 System Board Real-TimeClock 000-00D Status 2-24 System Board BitFunction CMOS RAM Configuration Figure 2-20. DiagnosticByte Hex 00E Status Byte 2-26 System Board Diskette Drive Type Byte Hex 010 This byte indicates the typeHard Disk Bits 5 Figure 2-28. Installed Diskette Drive BitsDisk Drive Type Figure 2-26. Hard Disk Drive Type Byte 2-28 System Board ExpansionMemory Bytes Date-Century Miscellaneous System Functions and Ports Nonmaskable Interrupt NMI Port A Hex System Control0092 2-30 System Board System/2 and Personal Computer BIOS Interface System0061 System Other Passwords Power-On Password2-32 System Board Selectable Drive-Startup Sequence Hardware Compatibility 2-34 System Board Error Codes Figure 2-33 Part 1 of 2. Error Codes 2-36 System Board Figure 2-33 Part 2 of 2. Error Codes Section 3. Subsystems Note Use Video Subsystem3-2 Subsystems Figure3-1 AlphaBuffer Expanded BIOS Modes-TridentVESA Mode Monitor Modem Subsystem ThinkPad ModemMIDI Port Function Sound Blaster Support Function Telephony Modem Function 3-6 Subsystems I/O Address Audio SubsystemMPC-2 Line Audio Port Specifications3-8 Subsystems Infrared IR Subsystem DMA Channel Enhanced Video Subsystem Video Port Specification3-10 Subsystems same PCMCIA Subsystem2 Manufactured by Texas Instruments corporation Pin Assignments 3-12 Subsystems PCMCIA PC Card Slot Pin Assignments Ground IDE Channel on the UltraBay MIDI/Joystick PortMIDI Interface Joystick Interface Appendix A. System Resources Page Resource Page Appendix B. System Management API SMAPI BIOS Overview B-2 SMAPI BIOS System Configuration Power ManagementSMAPI BIOS B-3 Overview B-4 SMAPI BIOS Image SMAPI BIOS B-5 Information WordReal Mode Entry Point 16-Bit or 32-Bit Protected Calling Convention B-6 SMAPI BIOSParameter Structure SMAPI BIOS B-7 Output Field B-8 SMAPI BIOS Sample in Assembler Language SMAPI BIOS B-9 Sample in C Language Calling Convention Pseudo Code B-10 SMAPI BIOS B-11 Return Codes Service B-12Function Description Get System Identification SMAPI BIOS B-13 Get CPU Information B-14 InformationGet Display Device SMAPI BIOS B-15 Get Docking Station B-16 Get UltraBayInformation Control Unit Information SMAPI BIOS B-17Get Slave Micro B-18 Get System Sensor SMAPI BIOS B-19 Get Video Information B-20 CapabilityGet Refresh Rate SMAPI BIOS B-21 System Configuration Service B-22 SMAPI BIOS B-23 Set Display Device State B-24 SMAPI BIOS B-25 Get Pointing Device B-26 Set Pointing Device SMAPI BIOS B-27 Get Hotkey B-28 Set Hotkey Sticky/Lock Power SMAPI BIOS B-29Service B-30 Set Power Management Get Timer Control SMAPI BIOS B-31 B-32 Set Timer Control SMAPI BIOS B-33 Event Bit Definition B-34 Condition SMAPI BIOS B-35Get System Event Global Set System Event Global Condition B-36 Get System Event SMAPI BIOS B-371 Condition 1 Condition Set System EventB-38 SMAPI BIOS B-39 2 Condition B-40 Get System Timer SMAPI BIOS B-41 Set System Timer B-42 SMAPI BIOS B-43 Get Hibernation Set Hibernation Timer B-44 SMAPI BIOS B-45 3 Condition B-46 SMAPI BIOS B-47 Get System Resume B-48 Set System Resume SMAPI BIOS B-49 B-50 SMAPI BIOS B-51 Standby B-52 Hibernation Samples SMAPI BIOS B-53Data Structure Parameters B-54 SMAPI BIOS B-55 SMBHDRRSEGMENTSMBHDRP16OFFSET SMBHDRP32OFFSET B-56 SMAPI BIOS B-57 Function Declaration Installation Check B-58 SMAPI BIOS B-59 B-60 SMAPI BIOS B-61 MyPtr BIOS Call B-62 SMAPI BIOS B-63 32-Bit Protected Mode B-64 MyInput.SMBINSUBFUNC Appendix C. Notices Trademarks C-2 Notices Index X-2 Index Index X-4 Index boardcontinued devicescontinued Part Number 05L1739 Printed in the United States of America