84PCE:Syscalls:021D7C

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Synopsis

Hypothesized Official Name: SignExtendDE

Syscall Address: 021D7Ch

This was originally a broken call, and still is in OS 5.0.0.0089 (and others, perchance?) But after sending in information, TI did an amazing job and fixed this call.

It is known to work in OS 5.1.0.0110.

Inputs

DE - 16-bit signed value

Outputs

DE - 24-bit signed value

Destroys

  • DEU