261 lines
14 KiB
HTML
261 lines
14 KiB
HTML
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<TITLE>Int E0/CL=9Ah
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<META NAME="Description" CONTENT="
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Int E0/CL=9Ah - REAL/32 - S_SYSDAT - GET SYSTEM DATA AREA -
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CL = 9Ah
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Return: ES:AX - system data area (see #04048)
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may destroy SI,DI
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Format of REAL/32 system data area:
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Offset Size Description (Table 04048)
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00h DWORD address of supervisor entry point
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04h 36 BYTEs reserved
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28h DWORD address of XIOS entry point
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2Ch DWORD address of XIOS initialization point
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<h2>Int E0/CL=9Ah
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<h3><font color=#C00040>REAL/32 - S_SYSDAT - GET SYSTEM DATA AREA</font></h3>
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<PRE>
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CL = 9Ah<br>
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<p><b>Return:</b><br>ES:AX -> system data area (see #04048)
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may destroy SI,DI
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<p>
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Format of REAL/32 system data area:
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<a name=table4048></a>
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Offset Size Description (Table 04048)
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00h DWORD address of supervisor entry point
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04h 36 BYTEs reserved
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28h DWORD address of XIOS entry point
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2Ch DWORD address of XIOS initialization point
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30h 8 BYTEs reserved
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38h DWORD address of IRET dispatcher entry point
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3Ch DWORD address of RETF dispatcher entry point
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40h WORD segment of operating system code
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42h WORD paragraph address of first Resident System Process (RSP)
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44h WORD paragraph after OS system area
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46h BYTE reserved
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47h BYTE number of system console devices
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48h BYTE number of system list (printer) devices
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49h BYTE number of Character Control blocks
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4Ah BYTE number of system flags
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4Bh BYTE current search disk
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4Ch WORD maximum memory per process
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4Eh BYTE reserved
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4Fh BYTE "dayfile" (flag, true if FFh)
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50h BYTE default disk for temporary files
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51h BYTE system ticks per second (typically 60)
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52h WORD offset of Locked Unused list
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54h WORD offset of CCB table
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56h WORD offset of system flag table
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58h WORD offset of root of Memory Descriptor Unused list
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5Ah WORD offset of Memory Free list
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5Ch WORD offset of Process Unused list
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5Eh WORD offset of Queue Unused list
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60h 4 WORDs (no longer used) QMAU
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68h WORD offset of root of Ready List
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6Ah WORD offset of root of Delay List
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6Ch WORD offset of Dispatcher Ready list
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6Eh WORD offset of root of Poll List
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70h WORD reserved
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72h WORD offset of root of Thread List
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74h WORD offset of root of Queue List
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76h WORD offset of Memory Allocation list
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78h WORD segment of version string
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7Ah WORD BDOS version number
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7Ch WORD OS version number
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7Eh WORD number of days since 1978/01/01
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<p><b>80h BYTE current time:</b><br>Hour
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<p><b>81h BYTE current time:</b><br>Minute
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<p><b>82h BYTE current time:</b><br>Second
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83h BYTE number of XIOS consoles
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84h BYTE number of XIOS list (printer) devices
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85h BYTE total number of character devices
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86h WORD offset of LCB table
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88h WORD bitmap of open files
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8Ah BYTE maximum locked records per process
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8Bh BYTE maximum open files per process
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8Ch WORD offset of process descriptor for math coprocessor's owner
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8Eh WORD offset of Auxiliary Control Block
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90h 8 BYTEs reserved
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98h WORD offset of root Memory Window Descriptor
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9Ah WORD reserved
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9Ch BYTE number of Auxiliary Control Blocks
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9Dh BYTE default search disk
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9Eh BYTE reserved
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9Fh BYTE number of physical consoles
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A0h DWORD address of 8087 interrupt handler
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A4h DWORD address of default 8087 exception handler
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... reserved
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C00h 82 BYTEs XIOS header structure <a href="rb-8561.htm#Table4049" tppabs="http://www.ctyme.com/intr/rb-8561.htm#Table4049">(see #04049)</a>
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<p>
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Format of REAL/32 XIOS header structure:
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<a name=table4049></a>
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Offset Size Description (Table 04049)
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00h 3 BYTEs XIOS initialization entry point
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03h 3 BYTEs XIOS service entry point
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06h WORD segment address of system data
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08h DWORD address of supervisor entry point
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0Ch BYTE set tick flag
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0Dh BYTE ticks per second
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0Eh BYTE global Door Open interrupt flag
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0Fh BYTE number of Auxiliary Control Blocks
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10h BYTE number of physical consoles
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11h BYTE number of virtual consoles
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12h BYTE number of logical consoles
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13h BYTE number of list control blocks
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14h WORD offset of CCB table
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16h WORD offset of LCB table
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18h 16 WORDs offsets into DPH for drives A-P
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38h WORD buffer size in paragraphs
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3Ah WORD offset of ACB table
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3Ch WORD used by OEM
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3Eh WORD offset of CCB pointer array
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40h WORD offset of LCB pointer array
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42h WORD offset of ACB pointer array
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44h BYTE 'first' flag
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45h BYTE unused
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46h WORD offset of print device support table
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48h WORD offset of aux device support table
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4Ah WORD XIOS extra segment
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4Ch WORD segment of save end address for debug
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4Eh WORD segment of save start address for debug
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50h BYTE number of main virtual console
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51h WORD segment of XIOS code
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</PRE>
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<p><b>See Also:</b>
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#04048
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<p>
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<b>Category: <a href="cat-030.htm" tppabs="http://www.ctyme.com/intr/cat-030.htm">
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Other Operating Systems</a>
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Int E0h</a>
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