Files
open-roms/c64/kernal/iec_pull_atn_clk_release_data.s
T

8 lines
176 B
ArmAsm

iec_pull_atn_clk_release_data:
lda CI2PRA
ora #BIT_CI2PRA_ATN_OUT + BIT_CI2PRA_CLK_OUT ; pull
and #$FF - BIT_CI2PRA_DAT_OUT ; release
sta CI2PRA
rts