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32x: add some comments

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notaz 2013-07-08 02:44:16 +03:00
parent a8fd6e3761
commit 65514d85d5
2 changed files with 20 additions and 8 deletions
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8
cpu/sh2/compiler.c
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@ -166,9 +166,9 @@ static const int reg_map_g2h[] = {
4, 5, 6, 7, 4, 5, 6, 7,
8, -1, -1, -1, 8, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, 9, -1, -1, -1, 9, // r12 .. sp
-1, -1, -1, 10, -1, -1, -1, 10, // SHR_PC, SHR_PPC, SHR_PR, SHR_SR,
-1, -1, -1, -1, -1, -1, -1, -1, // SHR_GBR, SHR_VBR, SHR_MACH, SHR_MACL,
}; };
static temp_reg_t reg_temp[] = { static temp_reg_t reg_temp[] = {
@ -2986,7 +2986,7 @@ int sh2_execute(SH2 *sh2c, int cycles)
sh2c->cycles_timeslice = cycles; sh2c->cycles_timeslice = cycles;
// cycles are kept in SHR_SR unused bits (upper 20) // cycles are kept in SHR_SR unused bits (upper 20)
// bit19 contains T saved for delay slot // bit11 contains T saved for delay slot
// others are usual SH2 flags // others are usual SH2 flags
sh2c->sr &= 0x3f3; sh2c->sr &= 0x3f3;
sh2c->sr |= cycles << 12; sh2c->sr |= cycles << 12;

20
pico/32x/memory.c
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@ -1,13 +1,10 @@
/* /*
* PicoDrive * PicoDrive
* (C) notaz, 2009,2010 * (C) notaz, 2009,2010,2013
* *
* This work is licensed under the terms of MAME license. * This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory. * See COPYING file in the top-level directory.
* *
* SH2 addr lines:
* iii. .cc. ..xx * // Internal, Cs, x
*
* Register map: * Register map:
* a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm
* a15102 ........ ......SM ? 4002 // intS intM * a15102 ........ ......SM ? 4002 // intS intM
@ -25,6 +22,21 @@
* a1511e ? ? 401e * a1511e ? ? 401e
* a15120 (16 bytes comm) 2020 * a15120 (16 bytes comm) 2020
* a15130 (PWM) 2030 * a15130 (PWM) 2030
*
* SH2 addr lines:
* iii. .cc. ..xx * // Internal, Cs, x
*
* sh2 map, wait/bus cycles (from docs):
* r w
* rom 0000000-0003fff 1 -
* sys reg 0004000-00040ff 1 1
* vdp reg 0004100-00041ff 5 5
* vdp pal 0004200-00043ff 5 5
* rom 2000000-23fffff 6-15
* dram/fb 4000000-401ffff 5-12 1-3
* fb ovr 4020000-403ffff
* sdram 6000000-603ffff 12 2 (cycles)
* d.a. c0000000-?
*/ */
#include "../pico_int.h" #include "../pico_int.h"
#include "../memory.h" #include "../memory.h"