From db1d3564e69b422518701926bffdeae05379c400 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Tue, 22 Sep 2009 19:38:49 +0000
Subject: [PATCH] 32x: preliminary PWM implementation. 32x opts in menu

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@790 be3aeb3a-fb24-0410-a615-afba39da0efa
---
 pico/32x/32x.c          |   7 +-
 pico/32x/memory.c       |  57 +++++++++-------
 pico/32x/pwm.c          | 144 ++++++++++++++++++++++++++++++++++++++++
 pico/debug.c            |   2 +
 pico/memory.c           |   8 +--
 pico/memory_arm.s       |  18 ++---
 pico/pico.c             |   7 +-
 pico/pico.h             |   4 +-
 pico/pico_cmn.c         |   9 +++
 pico/pico_int.h         |  16 ++++-
 pico/sound/sound.c      |   3 +
 platform/common/menu.c  |  17 +++++
 platform/common/menu.h  |   2 +
 platform/gp2x/Makefile  |   2 +-
 platform/gp2x/emu.c     |   4 +-
 platform/linux/Makefile |   2 +-
 16 files changed, 256 insertions(+), 46 deletions(-)
 create mode 100644 pico/32x/pwm.c

diff --git a/pico/32x/32x.c b/pico/32x/32x.c
index 20a942a..085ba5e 100644
--- a/pico/32x/32x.c
+++ b/pico/32x/32x.c
@@ -135,12 +135,15 @@ static __inline void SekRunM68k(int cyc)
 
 void PicoFrame32x(void)
 {
+  pwm_frame_smp_cnt = 0;
+
   Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank
-  if ((Pico32x.vdp_regs[0] & 3 ) != 0) // no forced blanking
-    Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no pal access
+  if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking
+    Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access
 
   p32x_poll_event(1);
 
   PicoFrameStart();
   PicoFrameHints();
 }
+
diff --git a/pico/32x/memory.c b/pico/32x/memory.c
index ff3c5a4..9c0fe8d 100644
--- a/pico/32x/memory.c
+++ b/pico/32x/memory.c
@@ -123,7 +123,6 @@ static void dma_68k2sh2_do(void)
     Pico32x.regs[6 / 2] &= ~P32XS_68S; // transfer complete
   if (dmac0->tcr0 == 0)
     dmac0->chcr0 |= 2; // DMA has ended normally
-  p32x_poll_undetect(&m68k_poll, 0);
 }
 
 // ------------------------------------------------------------------
@@ -137,7 +136,7 @@ static u32 p32x_reg_read16(u32 a)
   if ((a & 0x30) == 0x20)
     return sh2_comm_faker(a);
 #else
-  if (p32x_poll_detect(&m68k_poll, a, SekPc, 0)) {
+  if ((a & 0x30) == 0x20 && p32x_poll_detect(&m68k_poll, a, SekPc, 0)) {
     SekEndRun(16);
   }
 #endif
@@ -146,6 +145,8 @@ static u32 p32x_reg_read16(u32 a)
   if (a == 0x24 || a == 0x26)
     return sh2_comm_faker(a);
 #endif
+  if ((a & 0x30) == 0x30)
+    return p32x_pwm_read16(a);
 
   return Pico32x.regs[a / 2];
 }
@@ -196,9 +197,6 @@ static void p32x_reg_write16(u32 a, u32 d)
   u16 *r = Pico32x.regs;
   a &= 0x3e;
 
-  // for write loops with FIFO checks..
-  m68k_poll.cnt = 0;
-
   switch (a) {
     case 0x00: // adapter ctl
       r[0] = (r[0] & 0x83) | (d & P32XS_FM);
@@ -234,6 +232,11 @@ static void p32x_reg_write16(u32 a, u32 d)
       SekEndRun(16);
     return;
   }
+  // PWM
+  else if ((a & 0x30) == 0x30) {
+    p32x_pwm_write16(a, d);
+    return;
+  }
 
   p32x_reg_write8(a + 1, d);
 }
@@ -296,9 +299,19 @@ static u32 p32x_sh2reg_read16(u32 a, int cpuid)
       return r[a / 2];
   }
 
-  // DREQ src, dst; comm port
-  if ((a & 0x38) == 0x08 || (a & 0x30) == 0x20)
+  // DREQ src, dst
+  if ((a & 0x38) == 0x08)
     return r[a / 2];
+  // comm port
+  if ((a & 0x30) == 0x20) {
+    if (p32x_poll_detect(&sh2_poll[cpuid], a, sh2_pc(cpuid), 0))
+      ash2_end_run(8);
+    return r[a / 2];
+  }
+  if ((a & 0x30) == 0x30) {
+    sh2_poll[cpuid].cnt = 0;
+    return p32x_pwm_read16(a);
+  }
 
   return 0;
 }
@@ -316,12 +329,18 @@ static void p32x_sh2reg_write16(u32 a, u32 d, int cpuid)
 {
   a &= 0xfe;
 
+  // comm
   if ((a & 0x30) == 0x20 && Pico32x.regs[a/2] != d) {
     Pico32x.regs[a / 2] = d;
     p32x_poll_undetect(&m68k_poll, 0);
     p32x_poll_undetect(&sh2_poll[cpuid ^ 1], 0);
     return;
   }
+  // PWM
+  else if ((a & 0x30) == 0x30) {
+    p32x_pwm_write16(a, d);
+    return;
+  }
 
   switch (a) {
     case 0x14: Pico32x.sh2irqs &= ~P32XI_VRES; goto irls;
@@ -561,7 +580,6 @@ static void bank_switch(int b)
 
 u32 p32x_sh2_read8(u32 a, int id)
 {
-  int pd_vdp = 0;
   u32 d = 0;
 
   if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
@@ -581,13 +599,14 @@ u32 p32x_sh2_read8(u32 a, int id)
 
   if ((a & 0x0fffff00) == 0x4000) {
     d = p32x_sh2reg_read16(a, id);
-    goto out_pd;
+    goto out_16to8;
   }
 
   if ((a & 0x0fffff00) == 0x4100) {
     d = p32x_vdp_read16(a);
-    pd_vdp = 1;
-    goto out_pd;
+    if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
+      ash2_end_run(8);
+    goto out_16to8;
   }
 
   if ((a & 0x0fffff00) == 0x4200) {
@@ -599,10 +618,6 @@ u32 p32x_sh2_read8(u32 a, int id)
     id ? 's' : 'm', a, d, sh2_pc(id));
   return d;
 
-out_pd:
-  if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), pd_vdp))
-    ash2_end_run(8);
-
 out_16to8:
   if (a & 1)
     d &= 0xff;
@@ -616,7 +631,6 @@ out_16to8:
 
 u32 p32x_sh2_read16(u32 a, int id)
 {
-  int pd_vdp = 0;
   u32 d = 0;
 
   if (id == 0 && a < sizeof(Pico32xMem->sh2_rom_m))
@@ -636,13 +650,14 @@ u32 p32x_sh2_read16(u32 a, int id)
 
   if ((a & 0x0fffff00) == 0x4000) {
     d = p32x_sh2reg_read16(a, id);
-    goto out_pd;
+    goto out;
   }
 
   if ((a & 0x0fffff00) == 0x4100) {
     d = p32x_vdp_read16(a);
-    pd_vdp = 1;
-    goto out_pd;
+    if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), 1))
+      ash2_end_run(8);
+    goto out;
   }
 
   if ((a & 0x0fffff00) == 0x4200) {
@@ -654,10 +669,6 @@ u32 p32x_sh2_read16(u32 a, int id)
     id ? 's' : 'm', a, d, sh2_pc(id));
   return d;
 
-out_pd:
-  if (p32x_poll_detect(&sh2_poll[id], a, sh2_pc(id), pd_vdp))
-    ash2_end_run(8);
-
 out:
   elprintf(EL_32X, "%csh2 r16 [%08x]     %04x @%06x",
     id ? 's' : 'm', a, d, sh2_pc(id));
diff --git a/pico/32x/pwm.c b/pico/32x/pwm.c
new file mode 100644
index 0000000..102794b
--- /dev/null
+++ b/pico/32x/pwm.c
@@ -0,0 +1,144 @@
+#include "../pico_int.h"
+
+static int pwm_line_samples;
+static int pwm_cycles;
+static int pwm_mult;
+static int pwm_ptr;
+int pwm_frame_smp_cnt;
+
+
+void p32x_pwm_refresh(void)
+{
+  int cycles = Pico32x.regs[0x32 / 2];
+  int frame_samples;
+
+  cycles = (cycles - 1) & 0x0fff;
+  if (cycles < 500) {
+    elprintf(EL_32X|EL_ANOMALY, "pwm: low cycle value: %d", cycles + 1);
+    cycles = 500;
+  }
+  pwm_cycles = cycles;
+  pwm_mult = 0x10000 / cycles;
+  if (Pico.m.pal)
+    frame_samples = OSC_PAL / 7 * 3 / 50 / cycles;
+  else
+    frame_samples = OSC_NTSC / 7 * 3 / 60 / cycles;
+
+  pwm_line_samples = (frame_samples << 16) / scanlines_total;
+}
+
+// irq for every sample??
+// FIXME: we need to hit more than once per line :(
+void p32x_pwm_irq_check(void)
+{
+  int tm = (Pico32x.regs[0x30 / 2] & 0x0f00) >> 8;
+  if (tm == 0)
+    return; // TODO: verify
+
+  Pico32x.pwm_irq_sample_cnt += pwm_line_samples;
+  if (Pico32x.pwm_irq_sample_cnt >= (tm << 16)) {
+    Pico32x.pwm_irq_sample_cnt -= tm << 16;
+    Pico32x.sh2irqs |= P32XI_PWM;
+    p32x_update_irls();
+  }
+}
+
+unsigned int p32x_pwm_read16(unsigned int a)
+{
+  unsigned int d = 0;
+  int predict;
+
+  a &= 0x0e;
+  switch (a) {
+    case 0: // control
+    case 2: // cycle
+      return Pico32x.regs[(0x30 + a) / 2];
+
+    case 4: // L ch
+    case 6: // R ch
+    case 8: // MONO
+      predict = (pwm_line_samples * Pico.m.scanline) >> 16;
+      elprintf(EL_32X, "pwm: read status: ptr %d/%d, predict %d",
+        pwm_frame_smp_cnt, (pwm_line_samples * scanlines_total) >> 16, predict);
+      if (pwm_frame_smp_cnt > predict + 3)
+        d |= P32XP_FULL;
+      else if (pwm_frame_smp_cnt == 0 || pwm_frame_smp_cnt < predict - 1)
+        d |= P32XP_EMPTY;
+      break;
+  }
+
+  return d;
+}
+
+void p32x_pwm_write16(unsigned int a, unsigned int d)
+{
+  a &= 0x0e;
+  if (a == 0) // control
+    Pico32x.regs[0x30 / 2] = d;
+  else if (a == 2) { // cycle
+    Pico32x.regs[0x32 / 2] = d & 0x0fff;
+    p32x_pwm_refresh();
+    Pico32x.pwm_irq_sample_cnt = 0; // resets?
+  }
+  else if (a <= 8) {
+    d &= 0x0fff;
+    if (d > pwm_cycles)
+      d = pwm_cycles;
+    d = (d - pwm_cycles / 2) * pwm_mult;
+
+    if       (a < 6) // L ch
+      Pico32xMem->pwm[pwm_ptr * 2] = d;
+    else if (a == 6) // R ch
+      Pico32xMem->pwm[pwm_ptr * 2 + 1] = d;
+    else             // MONO
+      Pico32xMem->pwm[pwm_ptr * 2] = Pico32xMem->pwm[pwm_ptr * 2 + 1] = d;
+
+    if (a >= 6) { // R or MONO
+      pwm_frame_smp_cnt++;
+      pwm_ptr = (pwm_ptr + 1) & (PWM_BUFF_LEN - 1);
+        elprintf(EL_32X, "pwm: smp_cnt %d, ptr %d, smp %x", pwm_frame_smp_cnt, pwm_ptr, d);
+    }
+  }
+}
+
+void p32x_pwm_update(int *buf32, int length, int stereo)
+{
+  extern int pwm_ptr;
+  short *pwmb;
+  int step;
+  int p = 0;
+
+  if (pwm_ptr <= 16) // at least some samples..
+    return;
+
+  step = (pwm_ptr << 16) / length; // FIXME: division..
+  pwmb = Pico32xMem->pwm;
+
+  if (stereo)
+  {
+    while (length-- > 0) {
+      *buf32++ += pwmb[0];
+      *buf32++ += pwmb[1];
+
+      p += step;
+      pwmb += (p >> 16) * 2;
+      p &= 0xffff;
+    }
+  }
+  else
+  {
+    while (length-- > 0) {
+      *buf32++ += pwmb[0];
+
+      p += step;
+      pwmb += (p >> 16) * 2;
+      p &= 0xffff;
+    }
+  }
+
+  elprintf(EL_STATUS, "pwm_update: pwm_ptr %d, len %d, step %04x, done %d",
+    pwm_ptr, length, step, (pwmb - Pico32xMem->pwm) / 2);
+
+  pwm_ptr = 0;
+}
+
diff --git a/pico/debug.c b/pico/debug.c
index 26ec862..069a2b6 100644
--- a/pico/debug.c
+++ b/pico/debug.c
@@ -335,6 +335,8 @@ void PDebugDumpMem(void)
     dump_ram(Pico32xMem->dram[0], "dumps/dram0.bin");
     dump_ram(Pico32xMem->dram[1], "dumps/dram1.bin");
     dump_ram(Pico32xMem->pal, "dumps/pal32x.bin");
+    dump_ram(Pico32xMem->data_array[0], "dumps/data_array0.bin");
+    dump_ram(Pico32xMem->data_array[1], "dumps/data_array1.bin");
   }
 }
 
diff --git a/pico/memory.c b/pico/memory.c
index 13fc67e..d36ac62 100644
--- a/pico/memory.c
+++ b/pico/memory.c
@@ -476,7 +476,7 @@ u32 PicoRead8_io(u32 a)
     goto end;
   }
 
-  if (!(PicoOpt & POPT_DIS_32X)) {
+  if (PicoOpt & POPT_EN_32X) {
     d = PicoRead8_32x(a);
     goto end;
   }
@@ -511,7 +511,7 @@ u32 PicoRead16_io(u32 a)
     goto end;
   }
 
-  if (!(PicoOpt & POPT_DIS_32X)) {
+  if (PicoOpt & POPT_EN_32X) {
     d = PicoRead16_32x(a);
     goto end;
   }
@@ -541,7 +541,7 @@ void PicoWrite8_io(u32 a, u32 d)
     Pico.m.sram_reg |= (u8)(d & 3);
     return;
   }
-  if (!(PicoOpt & POPT_DIS_32X)) {
+  if (PicoOpt & POPT_EN_32X) {
     PicoWrite8_32x(a, d);
     return;
   }
@@ -569,7 +569,7 @@ void PicoWrite16_io(u32 a, u32 d)
     Pico.m.sram_reg |= (u8)(d & 3);
     return;
   }
-  if (!(PicoOpt & POPT_DIS_32X)) {
+  if (PicoOpt & POPT_EN_32X) {
     PicoWrite16_32x(a, d);
     return;
   }
diff --git a/pico/memory_arm.s b/pico/memory_arm.s
index e2b5990..dde8342 100644
--- a/pico/memory_arm.s
+++ b/pico/memory_arm.s
@@ -10,7 +10,7 @@
 .equ SRR_READONLY,  (1 <<  1)
 .equ SRF_EEPROM,    (1 <<  1)
 .equ POPT_6BTN_PAD, (1 <<  5)
-.equ POPT_DIS_32X,  (1 << 20)
+.equ POPT_EN_32X,   (1 << 20)
 
 .text
 .align 4
@@ -114,8 +114,8 @@ m_read8_not_io:
 m_read8_not_brq:
     ldr     r2, =PicoOpt
     ldr     r2, [r2]
-    tst     r2, #POPT_DIS_32X
-    beq     PicoRead8_32x
+    tst     r2, #POPT_EN_32X
+    bne     PicoRead8_32x
     mov     r0, #0
     bx      lr
 
@@ -190,8 +190,8 @@ m_read16_not_io:
 m_read16_not_brq:
     ldr     r2, =PicoOpt
     ldr     r2, [r2]
-    tst     r2, #POPT_DIS_32X
-    beq     PicoRead16_32x
+    tst     r2, #POPT_EN_32X
+    bne     PicoRead16_32x
     mov     r0, #0
     bx      lr
 
@@ -261,8 +261,8 @@ m_write8_not_z80ctl:
 m_write8_not_sreg:
     ldr     r2, =PicoOpt
     ldr     r2, [r2]
-    tst     r2, #POPT_DIS_32X
-    beq     PicoWrite8_32x
+    tst     r2, #POPT_EN_32X
+    bne     PicoWrite8_32x
     bx      lr
 
 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@ -298,8 +298,8 @@ m_write16_not_z80ctl:
 m_write16_not_sreg:
     ldr     r2, =PicoOpt
     ldr     r2, [r2]
-    tst     r2, #POPT_DIS_32X
-    beq     PicoWrite16_32x
+    tst     r2, #POPT_EN_32X
+    bne     PicoWrite16_32x
     bx      lr
 
 .pool
diff --git a/pico/pico.c b/pico/pico.c
index c4b9031..54de78c 100644
--- a/pico/pico.c
+++ b/pico/pico.c
@@ -77,7 +77,7 @@ void PicoPower(void)
   if (PicoAHW & PAHW_MCD)
     PicoPowerMCD();
 
-  if (!(PicoOpt & POPT_DIS_32X))
+  if (PicoOpt & POPT_EN_32X)
     PicoPower32x();
 
   PicoReset();
@@ -192,7 +192,7 @@ int PicoReset(void)
   if (!(PicoOpt & POPT_DIS_IDLE_DET))
     SekInitIdleDet();
 
-  if (!(PicoOpt & POPT_DIS_32X)) {
+  if (PicoOpt & POPT_EN_32X) {
     PicoReset32x();
     return 0;
   }
@@ -218,6 +218,9 @@ void PicoLoopPrepare(void)
 
   // FIXME: PAL has 313 scanlines..
   scanlines_total = Pico.m.pal ? 312 : 262;
+
+  if (PicoAHW & PAHW_32X)
+    p32x_pwm_refresh();
 }
 
 
diff --git a/pico/pico.h b/pico/pico.h
index f15915d..7b1a893 100644
--- a/pico/pico.h
+++ b/pico/pico.h
@@ -58,8 +58,8 @@ extern void emu_32x_startup(void);
 #define POPT_EN_SVP_DRC     (1<<17)
 #define POPT_DIS_SPRITE_LIM (1<<18)
 #define POPT_DIS_IDLE_DET   (1<<19)
-#define POPT_DIS_32X        (1<<20)
-#define POPT_DIS_PWM        (1<<21)
+#define POPT_EN_32X         (1<<20)
+#define POPT_EN_PWM         (1<<21)
 extern int PicoOpt; // bitfield
 
 #define PAHW_MCD  (1<<0)
diff --git a/pico/pico_cmn.c b/pico/pico_cmn.c
index d2801ed..2c49588 100644
--- a/pico/pico_cmn.c
+++ b/pico/pico_cmn.c
@@ -100,6 +100,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
     check_cd_dma();
 #endif
+#ifdef PICO_32X
+    p32x_pwm_irq_check();
+#endif
 
     // H-Interrupts:
     if (--hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
@@ -169,6 +172,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
   check_cd_dma();
 #endif
+#ifdef PICO_32X
+  p32x_pwm_irq_check();
+#endif
 
   // Last H-Int:
   if (--hint < 0)
@@ -237,6 +243,9 @@ static int PicoFrameHints(void)
 #ifdef PICO_CD
     check_cd_dma();
 #endif
+#ifdef PICO_32X
+    p32x_pwm_irq_check();
+#endif
 
     // Run scanline:
     if (Pico.m.dma_xfers) SekCyclesBurn(CheckDMA());
diff --git a/pico/pico_int.h b/pico/pico_int.h
index d28067b..4f62a66 100644
--- a/pico/pico_int.h
+++ b/pico/pico_int.h
@@ -1,7 +1,7 @@
 // Pico Library - Internal Header File
 
 // (c) Copyright 2004 Dave, All rights reserved.
-// (c) Copyright 2006-2008 Grazvydas "notaz" Ignotas, all rights reserved.
+// (c) Copyright 2006-2009 Grazvydas "notaz" Ignotas, all rights reserved.
 // Free for non-commercial use.
 
 // For commercial use, separate licencing terms must be obtained.
@@ -418,6 +418,9 @@ typedef struct
 #define P32XV_nFEN  (1<< 1)
 #define P32XV_FS    (1<< 0)
 
+#define P32XP_FULL  (1<<15) // PWM
+#define P32XP_EMPTY (1<<14)
+
 #define P32XF_68KPOLL   (1 << 0)
 #define P32XF_MSH2POLL  (1 << 1)
 #define P32XF_SSH2POLL  (1 << 2)
@@ -433,6 +436,7 @@ typedef struct
 
 // real one is 4*2, but we use more because we don't lockstep
 #define DMAC_FIFO_LEN (4*4)
+#define PWM_BUFF_LEN 1024 // in one channel samples
 
 struct Pico32x
 {
@@ -447,6 +451,7 @@ struct Pico32x
   unsigned int sh2irqs;          // common irqs
   unsigned short dmac_fifo[DMAC_FIFO_LEN];
   unsigned int dmac_ptr;
+  unsigned int pwm_irq_sample_cnt;
 };
 
 struct Pico32xMem
@@ -460,6 +465,7 @@ struct Pico32xMem
   unsigned short pal[0x100];
   unsigned short pal_native[0x100];     // converted to native (for renderer)
   unsigned int   sh2_peri_regs[2][0x200/4]; // periphereal regs of SH2s
+  signed short   pwm[2*PWM_BUFF_LEN];   // PWM buffer for current frame
 };
 
 // area.c
@@ -671,6 +677,14 @@ void p32x_poll_event(int is_vdp);
 // 32x/draw.c
 void FinalizeLine32xRGB555(int sh, int line);
 
+// 32x/pwm.c
+unsigned int p32x_pwm_read16(unsigned int a);
+void p32x_pwm_write16(unsigned int a, unsigned int d);
+void p32x_pwm_refresh(void);
+void p32x_pwm_irq_check(void);
+void p32x_pwm_update(int *buf32, int length, int stereo);
+extern int pwm_frame_smp_cnt;
+
 /* avoid dependency on newer glibc */
 static __inline int isspace_(int c)
 {
diff --git a/pico/sound/sound.c b/pico/sound/sound.c
index 6e0db26..fbb942a 100644
--- a/pico/sound/sound.c
+++ b/pico/sound/sound.c
@@ -356,6 +356,9 @@ static int PsndRender(int offset, int length)
       cdda_raw_update(buf32, length);
   }
 
+  if ((PicoAHW & PAHW_32X) && (PicoOpt & POPT_EN_PWM))
+    p32x_pwm_update(buf32, length, stereo);
+
   // convert + limit to normal 16bit output
   PsndMix_32_to_16l(PsndOut+offset, buf32, length);
 
diff --git a/platform/common/menu.c b/platform/common/menu.c
index 4393ed5..fa0480b 100644
--- a/platform/common/menu.c
+++ b/platform/common/menu.c
@@ -1424,6 +1424,21 @@ static int menu_loop_cd_options(menu_id id, int keys)
 	return 0;
 }
 
+// ------------ 32X options menu ------------
+
+static menu_entry e_menu_32x_options[] =
+{
+	mee_onoff("32X enabled",          MA_32XOPT_ENABLE_32X,   PicoOpt, POPT_EN_32X),
+	mee_onoff("PWM sound",            MA_32XOPT_PWM,          PicoOpt, POPT_EN_PWM),
+};
+
+static int menu_loop_32x_options(menu_id id, int keys)
+{
+	static int sel = 0;
+	me_loop(e_menu_32x_options, &sel, NULL);
+	return 0;
+}
+
 // ------------ adv options menu ------------
 
 static menu_entry e_menu_adv_options[] =
@@ -1672,6 +1687,7 @@ static menu_entry e_menu_options[] =
 	mee_range     (cpu_clk_name,               MA_OPT_CPU_CLOCKS,    currentConfig.CPUclock, 20, 900),
 	mee_handler   ("[Display options]",        menu_loop_gfx_options),
 	mee_handler   ("[Sega/Mega CD options]",   menu_loop_cd_options),
+	mee_handler   ("[32X options]",            menu_loop_32x_options),
 	mee_handler   ("[Advanced options]",       menu_loop_adv_options),
 	mee_handler_mkname_id(MA_OPT_SAVECFG, mh_saveloadcfg, mgn_savecfg),
 	mee_handler_id("Save cfg for current game only", MA_OPT_SAVECFG_GAME, mh_saveloadcfg),
@@ -2079,6 +2095,7 @@ static menu_entry *e_menu_table[] =
 	e_menu_gfx_options,
 	e_menu_adv_options,
 	e_menu_cd_options,
+	e_menu_32x_options,
 	e_menu_keyconfig,
 	e_menu_hidden,
 };
diff --git a/platform/common/menu.h b/platform/common/menu.h
index d6397e4..d3e49b2 100644
--- a/platform/common/menu.h
+++ b/platform/common/menu.h
@@ -85,6 +85,8 @@ typedef enum
 	MA_CDOPT_SCALEROT_CHIP,
 	MA_CDOPT_BETTER_SYNC,
 	MA_CDOPT_DONE,
+	MA_32XOPT_ENABLE_32X,
+	MA_32XOPT_PWM,
 	MA_CTRL_PLAYER1,
 	MA_CTRL_PLAYER2,
 	MA_CTRL_EMU,
diff --git a/platform/gp2x/Makefile b/platform/gp2x/Makefile
index 329da36..fedadf3 100644
--- a/platform/gp2x/Makefile
+++ b/platform/gp2x/Makefile
@@ -73,7 +73,7 @@ OBJS += pico/cd/pico.o pico/cd/memory.o pico/cd/sek.o pico/cd/LC89510.o \
 		pico/cd/area.o pico/cd/misc.o pico/cd/pcm.o pico/cd/buffering.o
 endif
 # Pico - 32X
-OBJS += pico/32x/32x.o pico/32x/memory.o pico/32x/draw.o
+OBJS += pico/32x/32x.o pico/32x/memory.o pico/32x/draw.o pico/32x/pwm.o
 # Pico - Pico
 OBJS += pico/pico/pico.o pico/pico/memory.o pico/pico/xpcm.o
 # Pico - carthw
diff --git a/platform/gp2x/emu.c b/platform/gp2x/emu.c
index 757bea6..49f7149 100644
--- a/platform/gp2x/emu.c
+++ b/platform/gp2x/emu.c
@@ -78,7 +78,9 @@ void pemu_prep_defconfig(void)
 
 	memset(&defaultConfig, 0, sizeof(defaultConfig));
 	defaultConfig.EmuOpt    = 0x9d | EOPT_RAM_TIMINGS|EOPT_CONFIRM_SAVE|EOPT_EN_CD_LEDS;
-	defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;
+	defaultConfig.s_PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
+				  POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES |
+				  POPT_EN_32X|POPT_EN_PWM;
 	defaultConfig.s_PsndRate = 44100;
 	defaultConfig.s_PicoRegion = 0; // auto
 	defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
diff --git a/platform/linux/Makefile b/platform/linux/Makefile
index 1fecdd7..8d83aaf 100644
--- a/platform/linux/Makefile
+++ b/platform/linux/Makefile
@@ -40,7 +40,7 @@ OBJS += pico/cd/pico.o pico/cd/memory.o pico/cd/sek.o pico/cd/LC89510.o \
 	pico/cd/cd_sys.o pico/cd/cd_file.o pico/cd/cue.o pico/cd/gfx_cd.o \
 	pico/cd/area.o pico/cd/misc.o pico/cd/pcm.o pico/cd/buffering.o
 # Pico - 32X
-OBJS += pico/32x/32x.o pico/32x/memory.o pico/32x/draw.o
+OBJS += pico/32x/32x.o pico/32x/memory.o pico/32x/draw.o pico/32x/pwm.o
 # Pico - Pico
 OBJS += pico/pico/pico.o pico/pico/memory.o pico/pico/xpcm.o
 # Pico - sound
-- 
2.39.2