diff options
| -rw-r--r-- | common/handshake.asm | 38 | ||||
| -rw-r--r-- | main.asm | 40 |
2 files changed, 39 insertions, 39 deletions
diff --git a/common/handshake.asm b/common/handshake.asm new file mode 100644 index 000000000..8ed1473e4 --- /dev/null +++ b/common/handshake.asm @@ -0,0 +1,38 @@ +AskSerial: ; 2063 +; send out a handshake while serial int is off + ld a, [$c2d4] + bit 0, a + ret z + + ld a, [$c2d5] + and a + ret nz + +; once every 6 frames + ld hl, $ca8a + inc [hl] + ld a, [hl] + cp 6 + ret c + + xor a + ld [hl], a + + ld a, $c + ld [$c2d5], a + +; handshake + ld a, $88 + ld [rSB], a + +; switch to internal clock + ld a, %00000001 + ld [rSC], a + +; start transfer + ld a, %10000001 + ld [rSC], a + + ret +; 208a + @@ -475,45 +475,7 @@ Function1d19: ; 1d19 INCLUDE "common/menu.asm" - -AskSerial: ; 2063 -; send out a handshake while serial int is off - ld a, [$c2d4] - bit 0, a - ret z - - ld a, [$c2d5] - and a - ret nz - -; once every 6 frames - ld hl, $ca8a - inc [hl] - ld a, [hl] - cp 6 - ret c - - xor a - ld [hl], a - - ld a, $c - ld [$c2d5], a - -; handshake - ld a, $88 - ld [rSB], a - -; switch to internal clock - ld a, %00000001 - ld [rSC], a - -; start transfer - ld a, %10000001 - ld [rSC], a - - ret -; 208a - +INCLUDE "common/handshake.asm" INCLUDE "common/game_time.asm" |