//
// Originally by David Raingeard
// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
-// Extensive cleanups/rewrites by James L. Hammons
+// Extensive cleanups/rewrites by James Hammons
// (C) 2010 Underground Software
//
-// JLH = James L. Hammons <jlhamm@acm.org>
+// JLH = James Hammons <jlhamm@acm.org>
//
// Who When What
// --- ---------- -------------------------------------------------------------
#include <SDL.h> // Used only for SDL_GetTicks...
#include <stdlib.h>
+#include "dac.h"
#include "gpu.h"
#include "jagdasm.h"
#include "jaguar.h"
DSPUpdateRegisterBanks();
dsp_control &= ~((dsp_flags & CINT04FLAGS) >> 3);
dsp_control &= ~((dsp_flags & CINT5FLAG) >> 1);
+
+// NB: This is just a wild hairy-assed guess as to what the playback frequency is.
+// It can be timed to anything really, anything that writes to L/RTXD at a regular
+// interval. Most things seem to use either the I2S interrupt or the TIMER 0
+// interrupt, so that's what we check for here. Just know that this approach
+// can be easily fooled!
+// Note also that if both interrupts are enabled, the I2S freq will win. :-P
+ if (data & INT_ENA1) // I2S interrupt
+ {
+ int freq = GetCalculatedFrequency();
+//This happens too often to be useful...
+// WriteLog("DSP: Setting audio freqency to %u Hz...\n", freq);
+ DACSetNewFrequency(freq);
+ }
+ else if (data & INT_ENA2) // TIMER 0 interrupt
+ {
+ int freq = JERRYGetPIT1Frequency();
+//This happens too often to be useful...
+// WriteLog("DSP: Setting audio freqency to %u Hz...\n", freq);
+ DACSetNewFrequency(freq);
+ }
+
/* if (IMASKCleared) // If IMASK was cleared,
#ifdef DSP_DEBUG_IRQ
{
// get the interrupt mask
int mask = ((dsp_flags >> 11) & 0x20) | ((dsp_flags >> 4) & 0x1F);
- WriteLog("DSP: pending=%08X enabled=%08X\n", bits, mask);
+ WriteLog("DSP: pending=$%X enabled=$%X (%s%s%s%s%s%s)\n", bits, mask,
+ (mask & 0x01 ? "CPU " : ""), (mask & 0x02 ? "I2S " : ""),
+ (mask & 0x04 ? "Timer0 " : ""), (mask & 0x08 ? "Timer1 " : ""),
+ (mask & 0x10 ? "Ext0 " : ""), (mask & 0x20 ? "Ext1" : ""));
WriteLog("\nRegisters bank 0\n");
for(int j=0; j<8; j++)
{