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svp minor adjustments, copyright
[picodrive.git]
/
Pico
/
carthw
/
svp
/
ssp16.c
diff --git
a/Pico/carthw/svp/ssp16.c
b/Pico/carthw/svp/ssp16.c
index
8bb2f1c
..
9f3ec31
100644
(file)
--- a/
Pico/carthw/svp/ssp16.c
+++ b/
Pico/carthw/svp/ssp16.c
@@
-1,8
+1,16
@@
// basic, incomplete SSP160x (SSP1601?) interpreter
// basic, incomplete SSP160x (SSP1601?) interpreter
+// with SVP memory controller
+
+// (c) Copyright 2008, Grazvydas "notaz" Ignotas
+// Free for non-commercial use.
+
+// For commercial use, separate licencing terms must be obtained.
+
+
+#include "../../PicoInt.h"
/*
* Register info
/*
* Register info
- * most names taken from MAME code
*
* 0. "-"
* size: 16
*
* 0. "-"
* size: 16
@@
-10,11
+18,11
@@
*
* 1. "X"
* size: 16
*
* 1. "X"
* size: 16
- * desc: Generic register. When set, updates P (P = X * Y * 2)
??
+ * desc: Generic register. When set, updates P (P = X * Y * 2)
*
* 2. "Y"
* size: 16
*
* 2. "Y"
* size: 16
- * desc: Generic register. When set, updates P (P = X * Y * 2)
??
+ * desc: Generic register. When set, updates P (P = X * Y * 2)
*
* 3. "A"
* size: 32
*
* 3. "A"
* size: 32
@@
-58,8
+66,7
@@
*
* 7. "P"
* size: 32
*
* 7. "P"
* size: 32
- * desc: multiply result register. Updated after mp* instructions,
- * or writes to X or Y (P = X * Y * 2) ??
+ * desc: multiply result register. P = X * Y * 2
* probably affected by MACS bit in ST.
*
* 8. "PM0" (PM from PMAR name from Tasco's docs)
* probably affected by MACS bit in ST.
*
* 8. "PM0" (PM from PMAR name from Tasco's docs)
@@
-106,7
+113,7
@@
*
* 15. "AL"
* size: 16
*
* 15. "AL"
* size: 16
- * desc: Accumulator Low. 16 least significant bits of accumulator
(not 100% sure)
+ * desc: Accumulator Low. 16 least significant bits of accumulator
.
* (normally reading acc (ld X, A) you get 16 most significant bits).
*
*
* (normally reading acc (ld X, A) you get 16 most significant bits).
*
*
@@
-168,21
+175,15
@@
* 30fe06 - also sync related.
* 30fe08 - job number [1-12] for SVP. 0 means no job. Set by 68k, read-cleared by SVP.
*
* 30fe06 - also sync related.
* 30fe08 - job number [1-12] for SVP. 0 means no job. Set by 68k, read-cleared by SVP.
*
- * TODO:
* + figure out if 'op A, P' is 32bit (nearly sure it is)
* + figure out if 'op A, P' is 32bit (nearly sure it is)
- * * what exactly is AL?
* * does mld, mpya load their operands into X and Y?
* * OP simm
*
* * does mld, mpya load their operands into X and Y?
* * OP simm
*
- * misc:
- * pressing all buttons while resetting game will kick into test mode
- *
* Assumptions in this code
* P is not directly writeable
* flags correspond to full 32bit accumulator
* only Z and N status flags are emulated (others unused by SVP)
* modifiers for 'OP a, ri' are ignored (invalid?/not used by SVP)
* Assumptions in this code
* P is not directly writeable
* flags correspond to full 32bit accumulator
* only Z and N status flags are emulated (others unused by SVP)
* modifiers for 'OP a, ri' are ignored (invalid?/not used by SVP)
- * modifiers '+' and '+!' act the same (this is most likely wrong)
* 'ld d, (a)' loads from program ROM
*/
* 'ld d, (a)' loads from program ROM
*/
@@
-563,7
+564,7
@@
static u32 read_PM1(void)
u32 d = pm_io(1, 0, 0);
if (d != (u32)-1) return d;
// can be removed?
u32 d = pm_io(1, 0, 0);
if (d != (u32)-1) return d;
// can be removed?
- elprintf(EL_SVP, "PM1 raw r %04x @ %04x", rPM1, GET_PPC_OFFS());
+ elprintf(EL_SVP
|EL_ANOMALY
, "PM1 raw r %04x @ %04x", rPM1, GET_PPC_OFFS());
return rPM1;
}
return rPM1;
}
@@
-572,7
+573,7
@@
static void write_PM1(u32 d)
u32 r = pm_io(1, 1, d);
if (r != (u32)-1) return;
// can be removed?
u32 r = pm_io(1, 1, d);
if (r != (u32)-1) return;
// can be removed?
- elprintf(EL_SVP, "PM1 raw w %04x @ %04x", d, GET_PPC_OFFS());
+ elprintf(EL_SVP
|EL_ANOMALY
, "PM1 raw w %04x @ %04x", d, GET_PPC_OFFS());
rPM1 = d;
}
rPM1 = d;
}
@@
-582,7
+583,7
@@
static u32 read_PM2(void)
u32 d = pm_io(2, 0, 0);
if (d != (u32)-1) return d;
// can be removed?
u32 d = pm_io(2, 0, 0);
if (d != (u32)-1) return d;
// can be removed?
- elprintf(EL_SVP, "PM2 raw r %04x @ %04x", rPM2, GET_PPC_OFFS());
+ elprintf(EL_SVP
|EL_ANOMALY
, "PM2 raw r %04x @ %04x", rPM2, GET_PPC_OFFS());
return rPM2;
}
return rPM2;
}
@@
-591,7
+592,7
@@
static void write_PM2(u32 d)
u32 r = pm_io(2, 1, d);
if (r != (u32)-1) return;
// can be removed?
u32 r = pm_io(2, 1, d);
if (r != (u32)-1) return;
// can be removed?
- elprintf(EL_SVP, "PM2 raw w %04x @ %04x", d, GET_PPC_OFFS());
+ elprintf(EL_SVP
|EL_ANOMALY
, "PM2 raw w %04x @ %04x", d, GET_PPC_OFFS());
rPM2 = d;
}
rPM2 = d;
}
@@
-629,7
+630,7
@@
static u32 read_PM4(void)
}
if (d != (u32)-1) return d;
// can be removed?
}
if (d != (u32)-1) return d;
// can be removed?
- elprintf(EL_SVP, "PM4 raw r %04x @ %04x", rPM4, GET_PPC_OFFS());
+ elprintf(EL_SVP
|EL_ANOMALY
, "PM4 raw r %04x @ %04x", rPM4, GET_PPC_OFFS());
return rPM4;
}
return rPM4;
}
@@
-638,7
+639,7
@@
static void write_PM4(u32 d)
u32 r = pm_io(4, 1, d);
if (r != (u32)-1) return;
// can be removed?
u32 r = pm_io(4, 1, d);
if (r != (u32)-1) return;
// can be removed?
- elprintf(EL_SVP, "PM4 raw w %04x @ %04x", d, GET_PPC_OFFS());
+ elprintf(EL_SVP
|EL_ANOMALY
, "PM4 raw w %04x @ %04x", d, GET_PPC_OFFS());
rPM4 = d;
}
rPM4 = d;
}