I'm sure you could use an AOUT but it's probably easier to use a pin on the PIC... SID_WT_Branch_Play
;; send MIDI clock if enabled for synchronization of external sequencers or similar
movlw 0xf8
BIFSET SID_MIDI_SYNC, SID_MIDI_SYNC_SEND_CLK, BANKED, call MIOS_MIDI_TxBufferPut
SET_BSR SID_BASE Only place I could find it sending MIDI Clock... I'm sure that can't be right. Wilba will chime in and correct me any minute I'm sure ;) Anyway, you just need to insert the lines to set and clear the pin. Are we talking about sync24? PS An amusing conversation that just happened here: ME: <typing away furiously> GF: What you doing, honey? ME: Uhm... Just helping out with some SID programming thingy for this guy <points at the screen> GF: Oh... Writing love letters to Wilba huh. :P ::) Smartarse! LMAO