Routines
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45315: Finish Joystick Controls
Used by the routines at ReadInterface2, ReadKempstonJoystick and ReadCursorKeys.
Adds the keys that work with every method of control, and stores the controls. Any of the keys Z, X, C, V, Symbol Shift, M, N and B fires the first weapon.
Input
C Controls that were read
FinishJoystickControls 45315 LD A,(38437) Fetch the controls that have not been used yet...
45318 AND 191 ...clear the bit for the action key...
45320 OR C ...and add the controls that were read.
45321 LD C,A Keep the controls.
45322 LD A,126 Read from the keyboard;
Port Number Bit
0 1 2 3 4
126 SHIFT / SPACE Z / SYM X / M C / N V / B
45324 CALL ReadKeys
45327 AND 30 Jump if none of the keys Z, X, C, V, Symbol Shift, M, N and B is pressed.
45329 JR Z,FinishJoystickControls_Store
45331 SET 4,C Set the bit for firing the first weapon.
FinishJoystickControls_Store 45333 LD A,C Fetch the controls...
45334 LD (38437),A ...and store them.
45337 POP BC Restore BC.
45338 LD C,A Return the controls in C as well.
45339 RET Return.
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