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| − | [[Category:83PCE:Hooks:By_Name|Token Hook]] [[Category:83PCE:Hooks:By_Address|9BC8 - Token Hook]]
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| − | == Synopsis ==
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| − | '''Name:''' Token Hook
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| − | '''Hook Pointer Block Address:''' [[83Plus:RAM:9BC8|9BC8]]
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| − | '''Hook Enable BCALL:''' [[83Plus:BCALLs:4F99|4F99]]
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| − | '''Hook Disable BCALL:''' [[83Plus:BCALLs:4F9C|4F9C]]
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| − | '''Hook Call BCALL:''' ''(none known)''
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| − | '''Hook Active Flag:''' [[83Plus:Flags:35#Bit_0|0, (iy + 35h)]]
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| − | This hook allows you to change the strings displayed for TIOS tokens.
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| − | == Using the Hook ==
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| − | * DE = token number * 2
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| − | ** 1-byte: 0000 to 01FE
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| − | ** Matrix: 0200 to 0212
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| − | ** List: 0214 to 021E
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| − | ** Equation: 0220 to 025C
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| − | ** Picture: 025E to 0270
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| − | ** GDB: 0272 to 0284
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| − | ** String: 0286 to 0298
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| − | ** Output Var: 029A to 0312
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| − | ** System Var: 0314 to 0382
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| − | ** Format: 0384 to 03A8
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| − | ** BB: 03AA to 0546 (or higher, depending on OS)
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| − | * HL = default string
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| − | ** Change HL to display a different string, which you must copy to RAM
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| − | == Comments ==
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| − | In OS 1.15 this hook was modified to prevent apps from defining new tokens. There are two checks in the token getting routine of OS 1.15: one which treats all undefined tokens as a question mark, and one which prevents the token hook from being run if the token is not in the standard OS 1.12 token set.
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| − | This was somewhat meta-fixed in OS 1.16 to the point that all of the original extended tokens can be used. However, it still doesn't allow new tokens to be defined.
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| − | To summarize:
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| − | * On OS 1.14 and prior OS's - all BB tokens are reported as 03AA+2T, including hacked tokens. This caused localizers to crash when they encountered the extended Symbolic tokens.
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| − | * On OS 1.15 - BB tokens after GarbageCollect are not passed to the token hook at all. They are always displayed as a question mark.
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| − | * On OS 1.16, and future OS's - BC is the unmodified value as reported by 1.14 for all tokens up to the last actual token supported; DE is set to a value representing a question-mark.
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| − | * On OS 2.20, and future OS's - For the BB tokens after tGarbageCollect BC contains the unmodified value and DE=$0012. All EF tokens are put after these as if EF XX was BB 1XX.
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