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mg_notes:apple_ii_atlk:undoc_functionality [2017/08/04 00:58] M.G. created |
mg_notes:apple_ii_atlk:undoc_functionality [2018/01/23 17:22] (current) M.G. [Init (function $01)] |
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| - | ====== Undocumented Functionality ====== | + | ====== AppleTalk Undocumented Functionality ====== |
| Here is some AppleTalk functionality not documented in the APDA //Apple II AppleShare Programmer's Guide//. | Here is some AppleTalk functionality not documented in the APDA //Apple II AppleShare Programmer's Guide//. | ||
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| | $02 | Result Code | Word | <- | | | $02 | Result Code | Word | <- | | ||
| | $04 | Init flags | Byte | See below. | | | $04 | Init flags | Byte | See below. | | ||
| - | | $05 | P8 Entry. | Long | P8 MLI entry address | | + | | $05 | P8 Entry | Long | P8 MLI entry address | |
| | $09 | Node number | Byte | Preferred node number or $00 | | | $09 | Node number | Byte | Preferred node number or $00 | | ||
| | $0A | Unknown | Word | ? | | | $0A | Unknown | Word | ? | | ||
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| | $80 | Full init, no MLI global page update \\ Used during IIgs boot | | | $80 | Full init, no MLI global page update \\ Used during IIgs boot | | ||
| | $40 | Full init, MLI global page update \\ Used by ATINIT and boot block LOGON | | | $40 | Full init, MLI global page update \\ Used by ATINIT and boot block LOGON | | ||
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| + | To initialize AppleTalk just enough to do ATP when ProDOS is not loaded, set up an IRQ handler that does ''JSR $Cn19 '' followed by ''RTI'' (where n is the slot number of the Workstation Card) and issue the init call with all parameters 0 except for the command byte of $01, then do ''JSR $Cn14'' in the manner of a ProDOS MLI call to initialize it. When it returns, enable interrupts. Example code is in [[projects:netboot_lc|NetBoot LC]]. | ||
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| + | To initalize AppleTalk for use by ProDOS (in, say, an ATINIT file), you must make the call with init flags = $40 and the P8 entry address as $0000BF00. After the init call returns success the following must take place: Use the ProDOS 8 ALLOC_INTERRUPT to allocate an interrupt routine with $Cn19 as the routine address, then update the global page MLI vector to go to $Cn14, and finally, enable interrupts. | ||
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| ===== FIUserPrefix (function $2A) ===== | ===== FIUserPrefix (function $2A) ===== | ||