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Utility routines: ZES1

[6502 Second Processor version, I/O processor]

Name: ZES1 [Show more] Type: Subroutine Category: Utility routines Summary: Zero-fill the page whose number is in X
Context: See this subroutine in context in the source code Variations: See code variations for this subroutine in the different versions References: This subroutine is called as follows: * TTX66 calls ZES1

Arguments: X The page we want to zero-fill
.ZES1 LDY #0 \ If we set Y = SC = 0 and fall through into ZES2 STY SC \ below, then we will zero-fill 255 bytes starting from \ SC - in other words, we will zero-fill the whole of \ page X