MACRO FNE I% LDX #LO(E%+I%*14) \ Set (Y X) to point to the I%-th set of envelope data LDY #HI(E%+I%*14) \ in E% LDA #8 \ Call OSWORD with A = 8 to set up sound envelope I% JSR OSWORD ENDMACROName: FNE [Show more] Type: Macro Category: Sound Summary: Macro definition for defining a sound envelopeContext: See this macro in context in the source code References: No direct references to this macro in this source file
The following macro is used to define the four sound envelopes used in the game. It uses OSWORD 8 to create an envelope using the 14 parameters in the the I%-th block of 14 bytes at location E%. This OSWORD call is the same as BBC BASIC's ENVELOPE command. See variable E% for more details of the envelopes themselves.
Sound envelope definitions
Configuration variable: OSWORD = &FFF1
The address for the OSWORD routine