--- /dev/null
+From 4589f663862d8e7a062b356db3034992a56ed1c9 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Fri, 17 Jun 2022 17:36:31 +0100
+Subject: [PATCH] add support System Realtime and System Common
+
+https://github.com/cchaussat/ttymidi-sysex/pull/2
+
+Add input and output support for MIDI System Common and System Realtime operations.
+---
+ ttymidi-sysex.c | 194 ++++++++++++++++++++++++++++++++++++++++++++----
+ 1 file changed, 181 insertions(+), 13 deletions(-)
+
+diff --git a/ttymidi-sysex.c b/ttymidi-sysex.c
+index ceaeaa9..fc39f49 100644
+--- a/ttymidi-sysex.c
++++ b/ttymidi-sysex.c
+@@ -338,18 +338,103 @@ void parse_midi_command(snd_seq_t* seq, int port_out_id, unsigned char *buf, int
+ break;
+
+ case 0xF0: // *new*
+- if (buf[0] == 0xF0) {
+- if (!arguments.silent && arguments.verbose) {
+- printf("Serial %02X Sysex len = %04X ", operation, buflen); // *new*
+- int i;
+- for (i=0; i < buflen; i++) {
+- printf("%02X ", buf[i]);
++ switch (channel) {
++ case 0x0:
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial %02X Sysex len = %04X ", operation, buflen); // *new*
++ int i;
++ for (i=0; i < buflen; i++) {
++ printf("%02X ", buf[i]);
++ }
++ printf("\n");
++ fflush(stdout); // *new*
+ }
+- printf("\n");
+- fflush(stdout); // *new*
+- }
+- // Send sysex message
+- snd_seq_ev_set_sysex(&ev, buflen, buf);
++ // Send sysex message
++ snd_seq_ev_set_sysex(&ev, buflen, buf);
++ break;
++ case 0x1: // MTC Quarter Frame package
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial MTC Quarter Frame %02x\n", param1);
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.data.control.value = param1;
++ ev.type = SND_SEQ_EVENT_QFRAME;
++ break;
++ case 0x2: // Song Position
++ int_param1 = (int) (param1 & 0x7F) + ((param2 & 0x7F) << 7); // *new*
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Song Position %04x\n", int_param1);
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.data.control.value = int_param1;
++ ev.type = SND_SEQ_EVENT_SONGPOS;
++ break;
++ case 0x3: // Song Select
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Song Select %02x\n", param1);
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.data.control.value = param1;
++ ev.type = SND_SEQ_EVENT_SONGSEL;
++ break;
++ case 0x6: // Tune Request
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Tune Request\n");
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.type = SND_SEQ_EVENT_TUNE_REQUEST;
++ break;
++ case 0x8: // Clock
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Clock\n");
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.type = SND_SEQ_EVENT_CLOCK;
++ break;
++ case 0xA: // Start
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Start\n");
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.type = SND_SEQ_EVENT_START;
++ break;
++ case 0xB: // Continue
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Continue\n");
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.type = SND_SEQ_EVENT_CONTINUE;
++ break;
++ case 0xC: // Stop
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Stop\n");
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.type = SND_SEQ_EVENT_STOP;
++ break;
++ case 0xE: // Active sense
++ if (!arguments.silent && arguments.verbose) {
++ printf("Serial Active sense\n");
++ fflush(stdout); // *new*
++ }
++ snd_seq_ev_set_fixed(&ev);
++ ev.type = SND_SEQ_EVENT_SENSING;
++ break;
++
++ default:
++ if (!arguments.silent) { // *new*
++ printf("Serial %02X Unknown MIDI System cmd\n", buf[0] & 0xFF); // *new*
++ fflush(stdout); // *new*
++ }
++ break;
+ }
+ break;
+
+@@ -464,6 +549,83 @@ void write_midi_action_to_serial_port(snd_seq_t* seq_handle)
+ }
+ break;
+
++ case SND_SEQ_EVENT_QFRAME:
++ bytes[0] = 0xF1;
++ bytes[1] = ev->data.control.value;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X MTC Quarter Frame %02X\n", bytes[0], bytes[1]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_SONGPOS:
++ bytes[0] = 0xF2;
++ ev->data.control.value += 8192;
++ bytes[1] = (unsigned char)(ev->data.control.value & 0x7F);
++ bytes[2] = (unsigned char)(ev->data.control.value >> 7);
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Song Position %04X\n", bytes[0], ev->data.control.value);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_SONGSEL:
++ bytes[0] = 0xF3;
++ bytes[1] = ev->data.control.value;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Song Select %02X\n", bytes[0], bytes[1]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_TUNE_REQUEST:
++ bytes[0] = 0xF6;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Tune Request\n", bytes[0]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_CLOCK:
++ bytes[0] = 0xF8;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Clock\n", bytes[0]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_START:
++ bytes[0] = 0xFA;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Start\n", bytes[0]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_CONTINUE:
++ bytes[0] = 0xFB;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Continue\n", bytes[0]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_STOP:
++ bytes[0] = 0xFC;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Stop\n", bytes[0]);
++ fflush(stdout); // *new*
++ }
++ break;
++
++ case SND_SEQ_EVENT_SENSING:
++ bytes[0] = 0xFE;
++ if (!arguments.silent && arguments.verbose) {
++ printf("Alsa %02X Active Sense\n", bytes[0]);
++ fflush(stdout); // *new*
++ }
++ break;
++
+ default:
+ if (!arguments.silent) { // *new*
+ printf("Alsa %02X Unknown MIDI cmd %02X %02X %02X\n", bytes[0]&0xF0, bytes[0]&0x0F, bytes[1], bytes[2]); // *new*
+@@ -484,8 +646,10 @@ void write_midi_action_to_serial_port(snd_seq_t* seq_handle)
+ if (bytes[0]!=0x00)
+ {
+ bytes[1] = (bytes[1] & 0x7F); // just to be sure that one bit is really zero
+- if (bytes[2]==0xFF) {
++ if (bytes[2]==0xFF || bytes[0]==0xF1 || bytes[0]==0xF3 || bytes[0]==0xF5)
+ write(serial, bytes, 2);
++ else if (bytes[0]==0xF4 || bytes[0]==0xF6 || bytes[0]>=0xF8) {
++ write(serial, bytes, 1);
+ } else {
+ bytes[2] = (bytes[2] & 0x7F);
+ write(serial, bytes, 3);
+@@ -570,7 +734,11 @@ void* read_midi_from_serial_port(void* seq)
+ break;
+ }
+ buf[0] = buf[i];
+- if(buf[0] != 0xF0) //if not SysEx *new*
++ if (buf[0] == 0xF1 || buf[0] == 0xF3 || buf[0] == 0xF5)
++ bytesleft = 1;
++ else if (buf[0] >= 0xF4 || buf[0] >= 0xF6 || (buf[0] >= 0xF8 && buf[0] <= 0xFE))
++ bytesleft = 0;
++ else if (buf[0] != 0xF0) //if not SysEx *new*
+ bytesleft = 3;
+ i = 1;
+ } else {
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