Nightshade: Routine at CA1B

CA1B: Flash one of B attributes, and steady the rest

Used by the routine at FLASH_MENU.

Sets bit 7, FLASH, on the A'th of B attribute bytes from HL and clears it on the others; HL comes back just past the last. FLASH_MENU marks the chosen control method with it. This entry deals with the first byte; the loop is FLASH_NEXT_ONE. Alien 8's and Pentagram's TOGGLE_SELECTED.

Input
HL	the first attribute
B	how many
A	which one flashes, counting from 0

TOGGLE_SELECTED

CA1B

AND A

not the first

CA1C

JR NZ,UNFLASH_THIS_ONE

This entry point is used by the routine at FLASH_NEXT_ONE.

FLASH_THIS_ONE

CA1E

SET 7,(HL)

flash this one

CA20

JR FLASH_LIST_STEP