1A00 - TIME - GET SYSTEM TIME
 1A01 - TIME - SET SYSTEM TIME
 1A02 - TIME - GET REAL-TIME CLOCK TIME (AT,XT286,PS)
 1A03 - TIME - SET REAL-TIME CLOCK TIME (AT,XT286,PS)
 1A04 - TIME - GET REAL-TIME CLOCK DATE (AT,XT286,PS)
 1A05 - TIME - SET REAL-TIME CLOCK DATE (AT,XT286,PS)
 1A06 - TIME - SET ALARM (AT,XT286,PS)
 1A07 - TIME - CANCEL ALARM (AT,XT286,PS)
 1A08 - TIME - SET RTC ACTIVATED POWER ON MODE (CONVERTIBLE)
 1A09 - TIME - READ RTC ALARM TIME AND STATUS (CONV,PS30)
 1A0A - TIME - READ SYSTEM-TIMER DAY COUNTER (XT2,PS)
 1A0B - TIME - SET SYSTEM-TIMER DAY COUNTER (XT2,PS)
 1A10 - NEC PC-9800 series - PRINTER - INITIALIZE
 1A11 - NEC PC-9800 series - PRINTER - OUTPUT CHARACTER
 1A12 - NEC PC-9800 series - PRINTER - SENSE STATUS
 1A3601 - WORD PERFECT v5.0 Third Party Interface - INSTALLATION CHECK
 1A6108 - SNAP.EXE 3.2+ - "SNAP_SENDWITHREPLY" - SEND MSG AND GET REPLY
 1A6205 - SNAP.EXE 3.2+ - "SNAP_SENDNOREPLY" - SEND MSG, DON'T AWAIT REPLY
 1A6308 - SNAP.EXE 3.2+ - "SNAP_BEGINCONV" - BEGIN CONVERSATION
 1A6405 - SNAP.EXE 3.2+ - "SNAP_ENDCONV" - END CONVERSATION
 1A6900 - SNAP.EXE 3.2+ - "SNAP_DATASEG" - GET RESIDENT DATA SEGMENT
 1A6A01 - SNAP.EXE 3.2+ - "SNAP_ALLOC" - ALLOCATE BUFFER IN SNAP DATA SEGMENT
 1A6B01 - SNAP.EXE 3.2+ - "SNAP_FREE" - DEALLOCATE BUFFER IN SNAP DATA SEGMENT
 1A6C04 - SNAP.EXE 3.2+ - "SNAP_COPYTO" - COPY DATA TO RESIDENT SNAP PACKAGE
 1A6D04 - SNAP.EXE 3.2+ - "SNAP_COPYFROM" - COPY DATA FROM RESIDENT SNAP PACKAGE
 1A6E01 - SNAP.EXE 3.2+ - "SNAP_SETDEBUG" - SET ???
 1A6F01 - SNAP.EXE 3.2+ - "SNAP_CHKINSTALL" - INSTALLATION CHECK
 1A7002 - SNAP.EXE 3.2+ - "SNAP_SETANCHOR"
 1A7101 - SNAP.EXE 3.2+ - "SNAP_GETANCHOR"
 1A7202 - SNAP.EXE 3.2+ - "SNAP_SETCONVPARMS" - SET CONVERSATION PARAMETERS
 1A7302 - SNAP.EXE 3.2+ - "SNAP_CLIENTVERSION" - ???
 1A7400 - SNAP.EXE 3.2+ - "SNAP_VERSION" - GET VERSION
 1A75 - SNAP.EXE 3.2+ - "SNAP_NOP" - ???
 1A76 - SNAP.EXE 3.2+ - "SNAP_802_5" - ???
 1A77 - SNAP.EXE 3.4 - ???
 1A7802 - SNAP.EXE 3.4 - ???
 1A7F - Tandy 2500, Tandy 1000L series - DIGITAL SOUND???
 1A80 - PCjr - SET UP SOUND MULTIPLEXOR
 1A8100 - Tandy 2500, Tandy 1000L series - DIGITAL SOUND - INSTALLATION CHECK
 1A83 - Tandy 2500, Tandy 1000L series - START PLAYING DIGITAL SOUND
 1A84 - Tandy 2500, Tandy 1000L series - STOP PLAYING DIGITAL SOUND
 1A85 - Tandy 2500, Tandy 1000L series - DIGITAL SOUND???
 1AA0 - Disk Spool II v2.07 - INSTALLATION CHECK
 1AAB - Disk Spool II v1.83 - INSTALLATION CHECK
 1AAC - Disk Spool II v1.83 - INSTALLATION CHECK
 1AAD - Disk Spool II v1.83 - FUNCTION CALLS
 1AC0 - Disk Spool II v2.07 - ALTERNATE INSTALLATION CHECK
 1AD0 - Disk Spool II v2.07 - FUNCTION CALLS
 1AF7 - RighTime v1.1 - TEMPORARILY DISABLE
 1AF8 - RighTime v1.1 - ENABLE
 1AFE - AT&T 6300 - READ TIME AND DATE
 1AFF - AT&T 6300 - SET TIME AND DATE
 1AFF - RighTime v1.1 - PERMANENTLY DISABLE