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svp minor adjustments, copyright

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@335 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-01-27 19:34:32 +00:00
parent 50483b5330
commit d4ca252d92
4 changed files with 45 additions and 19 deletions
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37
Pico/carthw/svp/ssp16.c
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@ -1,8 +1,16 @@
// 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
* most names taken from MAME code
*
* 0. "-"
* size: 16
@ -10,11 +18,11 @@
*
* 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
* 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
@ -58,8 +66,7 @@
*
* 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)
@ -106,7 +113,7 @@
*
* 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).
*
*
@ -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.
*
* TODO:
* + 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
*
* 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)
* modifiers '+' and '+!' act the same (this is most likely wrong)
* '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?
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;
}
@ -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?
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;
}
@ -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?
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;
}
@ -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?
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;
}
@ -629,7 +630,7 @@ static u32 read_PM4(void)
}
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;
}
@ -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?
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;
}