Some changes in preparation for the not yet committable PAS16 changes.

src/include/86box/filters.h

@@ -422,4 +422,31 @@ low_fir_sb16(int c, int i, double NewSample)
     return out;
 }
 
+extern double low_fir_pas16_coef[4][SB16_NCoef];
+
+static inline double
+low_fir_pas16(int c, int i, double NewSample)
+{
+    static double x[4][2][SB16_NCoef + 1]; // input samples
+    static int    pos[4] = { 0, 0, 0, 0 };
+    double        out    = 0.0;
+    int           n;
+
+    /* Calculate the new output */
+    x[c][i][pos[c]] = NewSample;
+
+    for (n = 0; n < ((SB16_NCoef + 1) - pos[c]) && n < SB16_NCoef; n++)
+        out += low_fir_pas16_coef[c][n] * x[c][i][n + pos[c]];
+    for (; n < SB16_NCoef; n++)
+        out += low_fir_pas16_coef[c][n] * x[c][i][(n + pos[c]) - (SB16_NCoef + 1)];
+
+    if (i == 1) {
+        pos[c]++;
+        if (pos[c] > SB16_NCoef)
+            pos[c] = 0;
+    }
+
+    return out;
+}
+
 #endif /*EMU_FILTERS_H*/

src/include/86box/pit.h

@@ -113,6 +113,7 @@ extern double AGPCLK;
 
 extern uint64_t PITCONST;
 extern uint64_t PAS16CONST;
+extern uint64_t PAS16CONST2;
 extern uint64_t ISACONST;
 extern uint64_t CGACONST;
 extern uint64_t MDACONST;
@@ -123,13 +124,19 @@ extern uint64_t RTCCONST;
 
 extern int refresh_at_enable;
 
-extern void pit_change_pas16_const(double prescale);
+extern void pit_device_reset(pit_t *dev);
+
+extern void pit_change_pas16_consts(double prescale);
 
 extern void pit_set_pit_const(void *data, uint64_t pit_const);
 
+extern void ctr_clock(void *data, int counter_id);
+
 /* Sets a counter's CLOCK input. */
 extern void pit_ctr_set_clock(ctr_t *ctr, int clock, void *priv);
 
+extern void pit_ctr_set_gate(void *data, int counter_id, int gate);
+
 extern void pit_ctr_set_out_func(void *data, int counter_id, void (*func)(int new_out, int old_out, void *priv));
 
 extern void pit_ctr_set_using_timer(void *data, int counter_id, int using_timer);

src/include/86box/pit_fast.h

@@ -71,10 +71,22 @@ typedef struct pitf_t {
     ctrf_t counters[3];
 
     uint8_t ctrl;
+
+    void *dev_priv;
 } pitf_t;
 
 extern void pitf_set_pit_const(void *data, uint64_t pit_const);
 
+extern void pitf_handler(int set, uint16_t base, int size, void *priv);
+
+extern void pitf_ctr_set_out_func(void *data, int counter_id, void (*func)(int new_out, int old_out, void *priv));
+
+extern void pitf_ctr_set_using_timer(void *data, int counter_id, int using_timer);
+
+extern void pitf_ctr_set_gate(void *data, int counter_id, int gate);
+
+extern void pitf_ctr_clock(void *data, int counter_id);
+
 extern uint8_t pitf_read_reg(void *priv, uint8_t reg);
 
 extern const pit_intf_t pit_fast_intf;

src/include/86box/sound.h

@@ -124,6 +124,7 @@ extern const device_t cms_device;
 extern const device_t gus_device;
 
 /* Pro Audio Spectrum 16 */
+extern const device_t pasplus_device;
 extern const device_t pas16_device;
 
 /* IBM PS/1 Audio Card */