The SAS is the common anchor for many system control blocks and control block chains.
Pointers
78:0 maps the SAS as a read/write segment.
SAS Base Section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴컴쩡컴컴컴컫컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커�Field Name �Offset �Length �Type �Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_signature �+0 �4 쿌 �"SAS " � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_tables_data �+4 �2 쿥 쿽ffset to tables section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_flat_sel �+6 �2 쿥 쿑LAT selector for kernel data � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_config_data �+8 �2 쿥 쿽ffset to configuration section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_data �+a �2 쿥 쿽ffset to device driver section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_data �+c �2 쿥 쿽ffset to Virtual Memory section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_task_data �+e �2 쿥 쿽ffset to Tasking section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_RAS_data �+10 �2 쿥 쿽ffset to RAS section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_file_data �+12 �2 쿥 쿽ffset to File System section � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컵컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_info_data �+14 �2 쿥 쿽ffset to infoseg section � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴컴좔컴컴컴컨컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_tables_section Protected Mode tables section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_tbl_GDT �+0 �2 쿥 퀂elector for GDT � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_tbl_LDT �+4 �2 쿥 퀂elector for LDT � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_tbl_IDT �+6 �2 쿥 퀂elector for IDT � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_tbl_GDTPOOL �+8 �2 쿥 퀂elector for GDTPOOL � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_config_section Configuration Section section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_config_table �+0 �2 쿥 쿽ffset for Device Configuration Table � � � � � �(DevConfigTbl) � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_dd_section Device Driver Section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_bimodal_chain�+0 �2 쿥 쿽ffset for the first bimodal device � � � � � 쿭river's device header � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_real_chain �+2 �2 쿥 쿽ffset for the address of the first real� � � � � 쿺ode device driver's device header � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_DPB_segment �+4 �2 쿥 퀂elector for Drive Parameter Block (DPB)� � � � � 퀂egment � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_CDA_anchor_p �+6 �2 쿥 퀂elector for ABIOS protected mode Common� � � � � 쿏ata Area � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_CDA_anchor_r �+8 �2 쿥 퀂egment for ABIOS real mode Common Data � � � � � 쿌rea � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_dd_FSC �+a �2 쿥 퀂elector for FSC � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_vm_section Virtual Memory Management section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_arena �+0 �4 쿏 쿑lat offset of arena records � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_object �+4 �4 쿏 쿑lat offset of object records � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_context �+8 �4 쿏 쿑lat offset of context records � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_krnl_mte �+c �4 쿏 쿑lat offset of kernel MTE records � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_glbl_mte �+10 �4 쿏 쿑lat offset of global MTE linked list. � � � � � 쿙ote this field points into the chain to� � � � � 쿾ick up global MTEs only. Use � � � � � 쿞AS_vm_all_mte to find all the MTEs. � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_pft �+14 �4 쿏 쿑lat offset of page frame table � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_prt �+18 �4 쿏 쿑lat offset of page range table � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_swap �+1c �4 쿏 쿛ointer to flat offset of swapper disk � � � � � 쿯rame bit map followed by the size of � � � � � 퀃he bit map in bits WARNING: the bit � � � � � 쿺ap offset and size are volatile � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_idle_head �+20 �4 쿏 쿑lat offset of Idle Head � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_free_head �+24 �4 쿏 쿑lat offset of Free Head � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_heap_info �+28 �4 쿏 쿑lat offset of Heap Array � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_vm_all_mte �+2c �4 쿏 쿑lat offset of all MTEs linked list � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_task_section Tasking section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_task_PTDA �+0 �2 쿥 퀂elector for current PTDA � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_task_ptdaptrs �+2 �4 쿏 쿑LAT offset for process tree head � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_task_threadptrs �+6 �4 쿏 쿑LAT address for TCB address array � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_task_tasknumber �+a �4 쿏 쿽ffset for current TCB number � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_task_threadcount�+e �4 쿏 쿽ffset for ThreadCount � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_RAS_section RAS section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_RAS_STDA_p �+0 �2 쿥 퀂elector for System Trace Data Area � � � � � �(STDA) � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_RAS_STDA_r �+2 �4 쿏 퀂egment for System Trace Data Area � � � � � �(STDA) � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_RAS_event_mask �+6 �4 쿏 쿽ffset for trace event mask � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_file_section File System section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_file_MFT �+0 �4 쿏 쿴andle to MFT PTree � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_file_SFT �+4 �2 쿥 퀂elector for System File Table (SFT) � � � � � 퀂egment � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_file_VPB �+6 �2 쿥 퀂elector for Volume Parameter Block � � � � � �(VPB) segment � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_file_CDS �+8 �2 쿥 퀂elector for Current Directory Structure� � � � � �(CDS) segment � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_file_buffers �+a �2 쿥 퀂elector for buffer segment � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
SAS_info_section Information Segment section.
旼컴컴컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_info_global �+0 �2 쿥 퀂elector for global info seg � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_info_local �+2 �4 쿏 쿪ddress of curtask local infoseg � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_info_localRM �+6 �4 쿏 쿪ddress of DOS task's infoseg � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿞AS_info_CDIB �+a �2 쿥 퀂elector for Codepage Data � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸