Device Probe Function, Ioc Iop Iot Mar Maw | Motorola MVME177

Disk I/O Support

When a disk transfer is requested:

❏Start and size of the transfer is specified in blocks

❏177Bug translates this into an equivalent sector specification

❏Passes the sector specification on to the controller to initiate the transfer

If the conversion from blocks to sectors yields a fractional sector count, an error is returned and no data is transferred.

Device Probe Function

A device probe with entry into the device descriptor table is performed whenever a specified device is accessed; i.e., when system calls:

❏.DSKRD

❏.DSKWR

❏.DSKCFIG

❏.DSKFMT

❏.DSKCTRL

or debugger commands:

❏BH

❏BO

❏IOC

❏IOP

❏IOT

❏MAR

❏MAW

are used.

B

B-15

Image 95

Motorola MVME177 manual Device Probe Function, Ioc Iop Iot Mar Maw

Contents

MVME177 Single Board Computer Installation and Use Manual Restricted Rights Legend Preface Page Adjusting This equipment. Use extreme caution when handling, testingPage Contents Page Page Flash Fill Test B-48Flash Patterns Test B-49 List of Figures List of Tables Model Number Speed Major Differences IntroductionModel Designations MVME177 Model Designations Feature Description FeaturesMVME177 Features Cooling Requirements Speciﬁcations MVME177 Speciﬁcations Characteristics SpeciÞcations FCC Compliance General Description MVME712AM Bbram MVME712M MVME712A MVME712AM MVME712B Equipment Required System V/68 Related Documentation Document Title Number Motorola Support Information Manual Terminology Unpacking Instructions Hardware Preparation and Installation What you will need to do Refer to Overview of Start-up ProcedureStart-up Overview Examine and/or change AppearsYou may also wish to obtain Initialize the clock Hardware Preparation MVME177 Switches, Headers, Connectors, Polyswitches LEDs Header Number Description ConÞguration Jumpers Conﬁguring MVME177 Headers 1MB Eprom MVME177 Header Notes Header Number Description ConÞguration Do not remove all jumpers from J2. This may Disable the Sram Setup Instructions Bit J1 Pins Description MVME177 Module Installation Instructions MVME177 Module Installation Instructions Hardware Preparation and Installation System Considerations Hardware Preparation and Installation MVME177 Module Installation Instructions Hardware Preparation and Installation Abort Switch S1 Controls and Indicators Reset Switch S2 Front Panel Indicators DS1 DS4 Normal Address Range Memory MapsLocal Bus Memory Map Software Address Range Devices Accessed Port Size InhibitLocal Bus Memory Map Local I/O Devices Memory Map Address Range Devices Accessed Port Size $FFF77000 $FFF77FFF Reserved Multi-MPU Programming Considerations Local Reset OperationSoftware Initialization Sysreset Operating Instructions Data Bus Structure Functional Description IntroductionMVME177 Functional Description MPU Scsi Block Flash Memory MC68060 MPUFlash Memory and Eprom Jumper or Control Bit Control Condition Memory ConÞguration Eprom and Flash Control and Conﬁguration Eprom Sram Do not short circuit Onboard Dram Battery Backed Up RAM and Clock Interfaces VMEbus Interface RXD CTS DCD TXD RTS DTR Serial Port Interface TXD RTS DTR Parallel Port Interface Ethernet Interface Scsi Termination Local ResourcesScsi Interface Software-Programmable Hardware Interrupts Programmable Tick TimersWatchdog Timer Local Bus to Dram Cycle Times Module IdentiﬁcationTiming Performance Local Bus Time-out Scsi Transfers ROM Cycle Times LAN DMA Transfers Remote Status and Control AEIA-232-D Interconnections Table A-1. EIA-232-D Interconnections Pin Signal Number Mnemonic Signal Name and Description Pin Number Mnemonic Signal Name and DescriptionLevels of Implementation Sample Conﬁgurations Signal Adaptations Figure A-1. Middle-of-the-Road EIA-232-D Conﬁguration Figure A-2. Minimum EIA-232-D Connection Proper Grounding EIA-232-D Interconnections Description of 177Bug Overview of M68000 Firmware Debugger General Information 177Bug Implementation Autoboot Autoboot in progress... To abort hit Break ROMboot Network Boot Restarting the System Abort Reset Break MPU Clock Speed Calculation SYSFAIL* Assertion/Negation Memory Requirements Terminal Input/Output Control Blocks Versus Sectors Disk I/O Support Debugger General Information IOC IOP IOT MAR MAW Device Probe Function IOP Physical I/O to Disk Disk I/O via 177Bug Commands IOI Input/Output Inquiry IOC I/O Control BO Bootstrap Operating SystemBH Bootstrap and Halt IOT I/O Teach Dskcfig Network I/O Support Default 177Bug Controller and Device ParametersDisk I/O Error Codes UDP/IP Protocol Modules Intel 82596 LAN Coprocessor Ethernet Driver Tftp Protocol Module Bootp Protocol ModuleRARP/ARP Protocol Modules Multiprocessor Control Register Mpcr Method Network Boot Control ModuleNetwork I/O Error Codes Multiprocessor Support Status codes that may be set by the bus master are Gcsr Method Diagnostic Facilities Test Group Description Table B-1. Diagnostic Test Groups Entering Debugger Command Lines Using the 177Bug Debugger Boldface strings Syntactic Variables Data Type Base IdentiÞer Examples Expression as a Parameter Expression Result In Hex String Numeric Value Literal Table B-2. Debugger Address Parameter Formats Address as a ParameterAddress Formats Offset Registers 177BugMD 1327CDI Port Numbers IOP Entering and Debugging Programs 177Bug Vector Table and Workspace Exception Vectors Used by 177Bug Hardware Functions Vector Offset Exception 177Bug Facility Table B-3. Exception Vectors Used by 177Bug Using 177Bug Target Vector Table Creating a New Vector Table Except SUBQ.L 177Bug Generalized Exception Handler 177BugMD A7&30 Floating Point Data Types Floating Point SupportInteger Data Types This format would appear in memory as Single Precision Real Packed Decimal Real Double Precision RealExtended Precision Real Scientiﬁc Notation Additions to Flash Commands Diagflash erase Flash Test Conﬁguration Acceptable EntriesErase Test Flash Fill Test Diagflash fill Flash Patterns Test Figure B-1. Three Possible Mapping Options Default Flash Test Conﬁguration Sflash Command Sflashl Pflash ff800000 ff9fffff ffa00000 177Bug Debugger Command Set Cnfg I M Table B-4. Debugger CommandsCommand Command Line Mnemonic Title Syntax BI Range B W L IOI CL ENV D Nopa n Niot H aR n a PA n VER E Or SET nC Debugger General Information First Second Controller Type Disk/Tape Controller Modules Supported Controller Device Disk/Tape Controller Default ConﬁgurationsController Address Device Device Type Controller MVME323 -- Four Devices Controller LUN Address Device LUN Device Type MVME328 -- Fourteen Devices Floppy Types and Formats IOT Parameter IOT Command Parameters for Supported Floppy Types Other Conﬁgure Board Information Block Commands Configure and Environment Commands ENV D Set Environment to Bug/Operating System = EFFFFFFF? Master Starting Address #2 = 00000000? ENV Parameter and Options Default Meaning of Default Table D-1. ENV Command Parameters LUN Network Auto Boot Memory Search Starting Address $02 refer to the Memory Requirements Accessible by the VMEbus. Default is Slave Ending Address #2 Master Ending Address #3 Short I/O VMEbus A16 Control Network Controller Modules Supported ENetwork Controller Data Clun Dlun Controller Interface Type Condition Possible Problem Try This Table F-1. Basic Troubleshooting Steps CTRL-Q Envd CR Set mmddyyhhmm CR De CR Env CRSt CR Index Index IN-7 IN-8 IN-9 IN-10 XON/XOFF