Move test units to z80/tests, and drivers are now statically linked

Makefiles for the test units were getting messier, so now drivers
(that need to be tested) are statically compiled in their own
folder under z80/drivers.

The kernel makefile and is now broken since everything has been moved.

1 files changed, 12 insertions, 2 deletions

diff --git a/sw/z80/kernel/drivers/pio.c b/sw/z80/drivers/pio.c
index 4321fb8..bdbe1c3 100644
--- a/sw/z80/kernel/drivers/pio.c
+++ b/sw/z80/drivers/pio.c
@@ -1,4 +1,4 @@
-#include "drivers/pio.h"
+#include "pio.h"
 
 static uint8_t *pio_port = (uint8_t *) ADDR_DEV_PIO;
 static uint8_t *pio_ctrl = (uint8_t *) (ADDR_DEV_PIO + 2);
@@ -34,7 +34,17 @@ void pio_set_interrupts(int port, int control)
 void pio_set_interrupts_mask(int port, int control, uint8_t mask)
 {
     // 0x17 is a control sequence to set interrupts
-    // and to interpret the next byte as a mask
+    // AND interpret the next byte as a bitmask
     _pio_control(port, (control | 0x17));
     _pio_control(port, mask);
 }
+
+uint8_t pio_read(int port)
+{
+    return *(pio_port + port);
+}
+
+void pio_write(int port, uint8_t data)
+{
+    _pio_data(port, data);
+}