Fix: wrong video mode in SuperCIC pair mode

In pair mode, CIC data lines are supposed to be outputs from the POV of the MCU.
During operation they could be switched back to inputs by the SysTick handler,
resetting the video mode/region back to NTSC regardless of settings.

src/cic.c

@@ -43,27 +43,29 @@ enum cicstates get_cic_state() {
   } else return CIC_FAIL;
 }
 
+void cic_preinit() {
+  GPIO_MODE_IN(SNES_CIC_D0_REG, SNES_CIC_D0_BIT);
+  GPIO_MODE_IN(SNES_CIC_D1_REG, SNES_CIC_D1_BIT);
+}
+
 void cic_init(int allow_pairmode) {
   GPIO_MODE_OUT(SNES_CIC_PAIR_REG, SNES_CIC_PAIR_BIT);
   OUT_BIT(SNES_CIC_PAIR_REG, SNES_CIC_PAIR_BIT, !allow_pairmode);
-  GPIO_MODE_IN(SNES_CIC_D0_REG, SNES_CIC_D0_BIT);
-  GPIO_MODE_IN(SNES_CIC_D1_REG, SNES_CIC_D1_BIT);
 }
 
 /* prepare GPIOs for pair mode + set initial modes */
 void cic_pair(int init_vmode, int init_d4) {
   cic_videomode(init_vmode);
   cic_d4(init_d4);
-
-  GPIO_MODE_OUT(SNES_CIC_D0_REG, SNES_CIC_D0_BIT);
-  GPIO_MODE_OUT(SNES_CIC_D1_REG, SNES_CIC_D1_BIT);
 }
 
 void cic_videomode(int value) {
   OUT_BIT(SNES_CIC_D0_REG, SNES_CIC_D0_BIT, value);
+  GPIO_MODE_OUT(SNES_CIC_D0_REG, SNES_CIC_D0_BIT);
 }
 
 void cic_d4(int value) {
   OUT_BIT(SNES_CIC_D1_REG, SNES_CIC_D1_BIT, value);
+  GPIO_MODE_OUT(SNES_CIC_D1_REG, SNES_CIC_D1_BIT);
 }
 

src/cic.h

@@ -15,6 +15,7 @@ void print_cic_state(void);
 char *get_cic_statename(enum cicstates state);
 char *get_cic_statefriendlyname(enum cicstates state);
 enum cicstates get_cic_state(void);
+void cic_preinit(void);
 void cic_init(int allow_pairmode);
 
 void cic_pair(int init_vmode, int init_d4);

src/main.c

@@ -120,6 +120,8 @@ int main(void) {
   printf("PCONP=%lx\n", LPC_SC->PCONP);
 #endif
   file_init();
+
+  cic_preinit();
   cic_init(0);
 
   fpga_init();