Routines
Prev: 33706 Up: Map Next: 33949
33913: Pause Check
Used by the routines at GameMenu, Select_Yes/No, PlayerNameInput, Handler_LocationChoice and HighScoreTable.
PauseCheck 33913 LD B,1 Call 32853 with a count of 1.
33915 CALL 32853
33918 CALL PauseCheck_Input Call PauseCheck_Input.
33921 JR C,PauseCheck Jump to PauseCheck if the carry flag is set.
Repeat of the above.
33923 LD B,1 Call 32853 with a count of 1.
33925 CALL 32853
33928 CALL PauseCheck_Input Call PauseCheck_Input.
33931 JR C,PauseCheck Jump to PauseCheck if the carry flag is set.
33933 RET Return.
Check to see if the SHIFT, Z, X, C, and V keys are being held down.
PauseCheck_Input 33934 LD BC,65278 Read from the keyboard;
Port Number Bit
0 1 2 3 4
254 SHIFT Z X C V
PauseCheck_Loop 33937 IN A,(C)
33939 AND %00011111 Keep only bits 0-4.
33941 CP 31 Return if A is not equal to 31 (which is ALL of the keys above - 00011111).
33943 RET NZ
33944 RLC B Rotate B left (with carry).
33946 JR C,PauseCheck_Loop Jump to PauseCheck_Loop if B has the carry flag set.
33948 RET Return.
Prev: 33706 Up: Map Next: 33949