IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF) IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
Table 13. Symbol Descriptions (continued) SYMBOL NO PCN R R/W SC SK SRT NAME Non-DMA Mode Present Cylinder Number Record Read/Write Sector Skip Step Rate Time ST 0 Status 0 ST 1 Status 1 ST 2 Status 2 ST3 Status 3 STP USO, US1 Scan Test Unit Select DESCRIPTION ND stands for operation in the Non-DMA Mode. PCN stands for Cylinder number at the completion of SENSE INTER RUPT STATUS Command, indicating the position of the Head at present time. Rstands for the Sector number, which will be read or written. R!W stands for either Read (R) or Write (W) signal. SC indicates the number of Sectors per Cylinder. SK stands for Skip Deleted Data Address Mark. SRT stands for the Stepping Rate for the FDD. (2 to 32 ms in 2 ms increments'! ST 0-3 stand for one of four registers which store the status information after a command has been executed. This information is available during the result phase after command execution. These registers should not be confused with the main status register (selected by AO =0). ST 0-3 may be read only after a command has been executed and contain information relevant to that particular command. During a Scan operation, if STP = 1, the data in contiguous sectors is compared byte by byte with data sent from the processor (or DMA), and if STP = 2, then alternate sectors are read and compared. US stands for a selected drive number encoded the same as bits 0 and 1 of the digital register (DOR) p 2-91 2-95
Command Summary oindicates 'logical 0' for that bit, 1 means 'logical 1', X means 'don't care'. DATA BUS PHASE RIW D7 D6 D5 D4 D3 D2 Dl DO REMARKS READ DATA Command W MT MF SK 0 0 1 1 0 Com mand Codes W X X X X X HD US1 usn W C Sector 10 W H information prior W R to Command execution W N W EDT W GPl W DlL Exec"tion Data-transfer between the FDD and main-system Result R ST 0 Status information after R ST 1 Command execution R ST 2 R C Sector 10 information R H after Command execution R R R N READ DELETED DATA Command W MT MF SK 0 1 1 0 0 Command Codes W X X X X X HD US1 usn w C Sector I D information W H prior to Command W R execution W N W EDT W GPl W DlL Execution Data-transfer between the FDD and main-system Result R ST 0 Status information after R ST 1 command execution R ST 2 R C Sector 10 information R H after command execution R R R N WRITE DATA Command W MT MF 0 0 0 1 0 1 Command Codes W X X X X X HD US1 usn w C Sector I D information Execution W H to command execution W R W N W EDT W GPl W DTl Data-transfer between the main-system and FDD Result R STO Status information after R ST 1 command execution R ST 2 R C Sector 10 information R H after command execution 2-96 R R R N
- Page 64 and 65: Color/Graphics Monitor Adapter The
- Page 66 and 67: CPU .. r-- ) ) ) DISPLAY ADDRESS BU
- Page 68 and 69: Modes of Operation There are two ba
- Page 70 and 71: IBM Monochrome Display Adapter V s.
- Page 72 and 73: Color selection is determined by th
- Page 74 and 75: 1"'"""""\ Table 5. I R G B Summary
- Page 76 and 77: Programming the Mode Control and St
- Page 78 and 79: Bit 5 When on, this bit will change
- Page 80 and 81: I/O Address and Bit Map Read/Write
- Page 82 and 83: Color/Graphics Monitor Adapter Auxi
- Page 84 and 85: Parallel Printer Adapter The Printe
- Page 86 and 87: Programming Considerations The Prin
- Page 88 and 89: Parallel Printer Adapter Interface
- Page 90 and 91: Table 7. Printer Specifications (1
- Page 92 and 93: Table 9. Functions and Conditions o
- Page 94 and 95: Table 10. Connector Pin Assignment
- Page 96 and 97: (4) Data transfer sequence Fig. 17
- Page 98 and 99: ASCII Control Codes Control Codes V
- Page 100 and 101: (8) DC 2 (Device Control 2) The DC
- Page 102 and 103: (b) 3) ESC 2 (Escape 2) Receipt of
- Page 104 and 105: ehaves like the LF code. Therefore,
- Page 106 and 107: [DATA] IESCGI ABCDEFGHI [PRINT] ABC
- Page 108 and 109: 5 1/4-Inch Diskette Drive Adapter T
- Page 110 and 111: ~ Functional Description From a pro
- Page 112 and 113: The FOe is capable of performing 15
- Page 116 and 117: Command Summary (continued) DATA B
- Page 118 and 119: Command Summary (continued) DATA B
- Page 120 and 121: Table 15. Status Register I BIT NO.
- Page 122 and 123: Table 17. Status Register 3 BIT NO.
- Page 124 and 125: ~ ~ +AO-9 +AEN -lOW -lOR -DACK2 +T
- Page 126 and 127: Adapter Inputs -Index -Write Protec
- Page 128 and 129: 5-1/4" Diskette Drive Adapter Exter
- Page 130 and 131: (3) The write-protect sensor disabl
- Page 132 and 133: Memory Expansion Options Two Memory
- Page 134 and 135: Switch - Configurable Start Address
- Page 136 and 137: Game Control Adapter The Game Co
- Page 138 and 139: I/O Channel Description A9-AO: D7-D
- Page 140 and 141: ) ) ) 15 PIN MALE '0' SHELL c....t
- Page 142 and 143: Asynchronous Communications Adapter
- Page 144 and 145: Modes of Operation The different mo
- Page 146 and 147: I TRANSMIT 'IACUIT I +5V ~ 4S-"l Tx
- Page 148 and 149: INS8250 Functional Pin Description
- Page 150 and 151: Data Set Ready (DSR), Pin 37: When
- Page 152 and 153: Input/Output Signals Data (D7-DO) B
- Page 154 and 155: Bit 3: This bit is the Parity Enabl
- Page 156 and 157: Table 23. BAUD RATE AT 1.843 Mhz De
- Page 158 and 159: Interrupt Identification Register T
- Page 160 and 161: Interrupt Enable Register This 8-bi
- Page 162 and 163: In the diagnostic mode, the receive
Command Summary<br />
oindicates 'logical 0' for that bit, 1 means 'logical 1',<br />
X means 'don't care'.<br />
DATA BUS<br />
PHASE RIW D7 D6 D5 D4 D3 D2 Dl DO REMARKS<br />
READ DATA<br />
Command W MT MF SK 0 0 1 1 0 Com mand Codes<br />
W X X X X X HD US1 usn<br />
W C Sector 10<br />
W H information prior<br />
W R to Command execution<br />
W<br />
N<br />
W<br />
EDT<br />
W<br />
GPl<br />
W<br />
DlL<br />
Exec"tion<br />
Data-transfer between<br />
the FDD and main-system<br />
Result R ST 0 Status information after<br />
R ST 1 Command execution<br />
R ST 2<br />
R C Sector 10 information<br />
R H after Command execution<br />
R<br />
R<br />
R<br />
N<br />
READ DELETED DATA<br />
Command W MT MF SK 0 1 1 0 0 Command Codes<br />
W X X X X X HD US1 usn<br />
w C Sector I D information<br />
W H prior to Command<br />
W R execution<br />
W<br />
N<br />
W<br />
EDT<br />
W<br />
GPl<br />
W<br />
DlL<br />
Execution<br />
Data-transfer between<br />
the FDD and main-system<br />
Result R ST 0 Status information after<br />
R ST 1 command execution<br />
R ST 2<br />
R C Sector 10 information<br />
R H after command execution<br />
R<br />
R<br />
R<br />
N<br />
WRITE DATA<br />
Command W MT MF 0 0 0 1 0 1 Command Codes<br />
W X X X X X HD US1 usn<br />
w C Sector I D information<br />
Execution<br />
W H to command execution<br />
W<br />
R<br />
W<br />
N<br />
W<br />
EDT<br />
W<br />
GPl<br />
W<br />
DTl<br />
Data-transfer between<br />
the main-system and FDD<br />
Result R STO Status information after<br />
R ST 1 command execution<br />
R ST 2<br />
R C Sector 10 information<br />
R H after command execution<br />
2-96 <br />
R<br />
R<br />
R<br />
N
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