Contact Sam Cruise: Routine at ECE1

ECE1: 'O' pressed - left

The address of this routine is found in the table of keypress handling routines at ED00. It is called from the main loop at F02B when 'O' is pressed.

Input
H	0xE6 (Sam)

ECE1

CALL $EBBB

Move Sam left (or in the next best direction) if possible

This entry point is used by the routines at ECD2, ECD7 and ECDC.

ECE4

RET NC

Return if Sam could not move in the desired direction

ECE5

LD A,($7FFD)

Collect the offset of the last key pressed from 7FFD

ECE8

BIT 3,A

Set the zero flag if a 'fast' key (upper case Q, A, O or P) was pressed

ECEA

LD B,$04

4=fast

ECEC

JR Z,$ECF0

Jump if a 'fast' key was pressed

This entry point is used by the routines at 6FDB, 76FA, 79E4 and F2F0.

ECEE

LD B,$08

8=slow

ECF0

CALL $EC69

Make a sound effect

ECF3

LD L,$07

Point HL at byte 0x07 of Sam's buffer

ECF5

LD A,(HL)

A=0 if Sam is neither midstride nor mid-action now

ECF6

INC L

Set Sam's main action timer in byte 0x08 of his buffer to either 4 (fast) or 8 (slow)

ECF7

LD (HL),B

ECF8

AND A

Is Sam midstride or mid-action?

ECF9

RET Z

Return if not

ECFA

INC L

Set Sam's midstride/mid-action timer in byte 0x09 of his buffer to either 4 (fast) or 8 (slow)

ECFB

LD (HL),B

ECFC

RET