Index: kernel/generic/include/ddi/irq.h
===================================================================
--- kernel/generic/include/ddi/irq.h	(revision f7ccf46462040f85a6392c22f2b8adc36b589a8f)
+++ kernel/generic/include/ddi/irq.h	(revision 373bc2d9d2f348d908db35baafe480c948d98d0d)
@@ -224,4 +224,6 @@
 	/** Notification configuration structure. */
 	ipc_notif_cfg_t notif_cfg; 
+
+	as_t *driver_as;
 } irq_t;
 
Index: kernel/generic/src/ipc/irq.c
===================================================================
--- kernel/generic/src/ipc/irq.c	(revision f7ccf46462040f85a6392c22f2b8adc36b589a8f)
+++ kernel/generic/src/ipc/irq.c	(revision 373bc2d9d2f348d908db35baafe480c948d98d0d)
@@ -174,4 +174,5 @@
 	irq->notif_cfg.code = code;
 	irq->notif_cfg.counter = 0;
+	irq->driver_as = AS;
 	
 	/*
@@ -364,4 +365,25 @@
 		return IRQ_DECLINE;
 	
+#define CMD_MEM_READ(target) \
+do { \
+	void *va = code->cmds[i].addr; \
+	if (AS != irq->driver_as) \
+		as_switch(AS, irq->driver_as); \
+	printf("Copying data from address: %p.\n", va); \
+	memcpy_from_uspace(&target, va, (sizeof(target))); \
+	if (dstarg) \
+		scratch[dstarg] = target; \
+} while(0)
+
+#define CMD_MEM_WRITE(val) \
+do { \
+	void *va = code->cmds[i].addr; \
+	if (AS != irq->driver_as) \
+		as_switch(AS, irq->driver_as); \
+	printf("Writing data to address: %p.\n", va); \
+	memcpy_to_uspace(va, &val, sizeof(val)); \
+} while (0)
+
+	as_t *current_as = AS;
 	size_t i;
 	for (i = 0; i < code->cmdcount; i++) {
@@ -422,4 +444,53 @@
 			}
 			break;
+		case CMD_MEM_READ_8: {
+			uint8_t val;
+			CMD_MEM_READ(val);
+			break;
+			}
+		case CMD_MEM_READ_16: {
+			uint16_t val;
+			CMD_MEM_READ(val);
+			break;
+			}
+		case CMD_MEM_READ_32: {
+			uint32_t val;
+			CMD_MEM_READ(val);
+			printf("mem READ value: %x.\n", val);
+			break;
+			}
+		case CMD_MEM_WRITE_8: {
+			uint8_t val = code->cmds[i].value;
+			CMD_MEM_WRITE(val);
+			break;
+			}
+		case CMD_MEM_WRITE_16: {
+			uint16_t val = code->cmds[i].value;
+			CMD_MEM_WRITE(val);
+			break;
+			}
+		case CMD_MEM_WRITE_32: {
+			uint32_t val = code->cmds[i].value;
+			CMD_MEM_WRITE(val);
+			break;
+			}
+		case CMD_MEM_WRITE_A_8:
+			if (srcarg) {
+				uint8_t val = scratch[srcarg];
+				CMD_MEM_WRITE(val);
+			}
+			break;
+		case CMD_MEM_WRITE_A_16:
+			if (srcarg) {
+				uint16_t val = scratch[srcarg];
+				CMD_MEM_WRITE(val);
+			}
+			break;
+		case CMD_MEM_WRITE_A_32:
+			if (srcarg) {
+				uint32_t val = scratch[srcarg];
+				CMD_MEM_WRITE(val);
+			}
+			break;
 		case CMD_BTEST:
 			if ((srcarg) && (dstarg)) {
@@ -435,10 +506,16 @@
 			break;
 		case CMD_ACCEPT:
+			if (AS != current_as)
+				as_switch(AS, current_as);
 			return IRQ_ACCEPT;
 		case CMD_DECLINE:
 		default:
+			if (AS != current_as)
+				as_switch(AS, current_as);
 			return IRQ_DECLINE;
 		}
 	}
+	if (AS != current_as)
+		as_switch(AS, current_as);
 	
 	return IRQ_DECLINE;