diff --git a/src/board/system76/galp3-c/pmc.c b/src/board/system76/galp3-c/pmc.c
index a67218d..80f4c59 100644
--- a/src/board/system76/galp3-c/pmc.c
+++ b/src/board/system76/galp3-c/pmc.c
@@ -3,6 +3,8 @@
 #include <board/scratch.h>
 #include <common/debug.h>
 
+uint8_t pmc_sci_queue = 0;
+
 void pmc_init(void) {
     *(PMC_1.control) = 0x41;
     *(PMC_2.control) = 0x41;
@@ -37,17 +39,24 @@ void pmc_event(struct Pmc * pmc) {
                 break;
             case 0x82:
                 DEBUG("  burst enable\n");
-                // TODO: figure out what burst is
+                // Set burst bit
+                pmc_set_status(pmc, sts | (1 << 4));
+                // Send acknowledgement byte
                 pmc_write(pmc, 0x90, PMC_TIMEOUT);
                 break;
             case 0x83:
                 DEBUG("  burst disable\n");
-                // TODO: figure out what burst is
+                // Clear burst bit
+                pmc_set_status(pmc, sts & ~(1 << 4));
                 break;
             case 0x84:
                 DEBUG("  SCI queue\n");
-                // TODO: queue is always empty
-                pmc_write(pmc, 0, PMC_TIMEOUT);
+                // Clear SCI event pending bit
+                pmc_set_status(pmc, sts & ~(1 << 5));
+                // Send SCI event
+                pmc_write(pmc, pmc_sci_queue, PMC_TIMEOUT);
+                // Clear SCI queue
+                pmc_sci_queue = 0;
                 break;
 
             case 0xDC:
diff --git a/src/ec/it8587e/include/ec/pmc.h b/src/ec/it8587e/include/ec/pmc.h
index dbf1a10..a1d96c6 100644
--- a/src/ec/it8587e/include/ec/pmc.h
+++ b/src/ec/it8587e/include/ec/pmc.h
@@ -23,6 +23,7 @@ extern struct Pmc __code PMC_2;
 #define PMC_STS_CMD (1 << 3)
 
 uint8_t pmc_status(struct Pmc * pmc);
+void pmc_set_status(struct Pmc * pmc, uint8_t status);
 uint8_t pmc_read(struct Pmc * pmc);
 bool pmc_write(struct Pmc * pmc, uint8_t data, int timeout);
 
diff --git a/src/ec/it8587e/pmc.c b/src/ec/it8587e/pmc.c
index 4bc70a2..424e332 100644
--- a/src/ec/it8587e/pmc.c
+++ b/src/ec/it8587e/pmc.c
@@ -14,6 +14,10 @@ uint8_t pmc_status(struct Pmc * pmc) {
     return *(pmc->status);
 }
 
+void pmc_set_status(struct Pmc * pmc, uint8_t status) {
+    *(pmc->status) = status;
+}
+
 uint8_t pmc_read(struct Pmc * pmc) {
     return *(pmc->data_in);
 }