IBM SY31-0458-3 Section 05 Channel free download

File name SY31-0458-3_Section_05_Channel.pdf

Contents CHANNEL . . . 5-1 Port to Attachment Lines . . . 5-17 I/O Immediate 5-26 INTRODUCTION 5-1 MPXPO Bus Out-Nine Lines 5-17 I/O Load or I/O Control Load (lOL, 10CL) 5-26 DATA FLOW ~ . 5.,.1 Control Out Pwrd-One Line 5-17 I/O Load Instruction 5-27 I/O Instructions . 5-2 Service Out Pwrd-One Une 5-17 I/O Load (Big Picture) , 5-28 Processing Unit Storage Link to I/O Command Bus Out 0, 1, 2-Three Lines 5-17 I/O Load (Detail) 5-30 Attachments. . . . . . . . . . . 5-2 Strobe Pwrd-One Line. . . . . . 5-17 I/O Sense or I/O Control Sense (lOS, 10CS) . 5-32 Control Processor Local Storage Register Transfer Error-One Line . . . . . 5-17 I/O Sense Instruction 5-33 Link to I/O Attachments . . . . . . . 5-2 Disk Burst Mode Gated-One Line . 5-17 I/O Sense (Big Picture) 5-34 Control Processor Jump on I/O Condition Disk Strobe-One Line 5-17 I/O Sense (Detail) . 5-36 Link to I/O Attachments 5-5 CSY Trigger-One Line . . . 5-17 Sense Interrupt Level Status Byte (SILSB) 5-38 PORT CARD 5..;6 Attachment to Port Lines . . . 5-18 Sense Interrupt Level Status Byte (Big Port Parity . . . . . . . . 5-6 MPXPO Data In-Nine Lines 5-18 Picture) , 5-38 Port Clock . . . . . . . . 5-8 Service In-One Line . . . . . . 5-18 Sense Interrupt Level Status Byte (Detail) 5-40 Generation of Port Clock Times . 5-8 Micro.interrupt Request-Five Lines. 5-18 Control Processor Load Function (MPLF) . 5-42 Generation of Port Triggers 5-8 Multidevice Response-One Line 5-18 Control Processor Sense (MPS) . 5-42 Data Buffer . . . . . 5-12 Base Cycle Steal Request-One Line I/O Storage (WTCL, WTCH, RDCL, RDCH, Port Register . . . . 5-13 (Per Device) . " " . . . . ., , , 5-18 WTM, ROM) . 5-43 Port Checks Register . 5-14 Disk/ Dskt Block Processor Clock-One Line " 5-18