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gsplus/src/moremem.c

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/*
GSPLUS - Advanced Apple IIGS Emulator Environment
Copyright (C) 2016 - Dagen Brock
Copyright (C) 2010 - 2014 by GSport contributors
Based on the KEGS emulator written by and Copyright (C) 2003 Kent Dickey
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "defc.h"
#ifdef HAVE_TFE
#include "tfe/protos_tfe.h"
#endif
extern char const g_gsplus_version_str[];
extern byte *g_memory_ptr;
extern byte *g_dummy_memory1_ptr;
extern byte *g_slow_memory_ptr;
extern byte *g_rom_fc_ff_ptr;
extern byte *g_rom_cards_ptr;
extern byte *g_grappler_rom;
extern unsigned char ioslotsel;
extern unsigned char iostrobe;
extern word32 slow_mem_changed[];
extern int g_num_breakpoints;
extern word32 g_breakpts[];
extern Page_info page_info_rd_wr[];
extern int Verbose;
extern int g_rom_version;
extern int g_user_page2_shadow;
extern int g_parallel;
char c;
/* from iwm.c */
int g_num_shadow_all_banks = 0;
#define IOR(val) ( (val) ? 0x80 : 0x00 )
extern int g_cur_a2_stat;
int g_em_emubyte_cnt = 0;
int g_paddle_buttons = 0;
int g_irq_pending = 0;
int g_c023_val = 0;
int g_c029_val_some = 0x41;
int g_c02b_val = 0x08;
int g_c02d_int_crom = 0;
int g_c031_disk35 = 0;
int g_c033_data = 0;
int g_c034_val = 0;
int g_c035_shadow_reg = 0x08;
int g_c036_val_speed = 0x80;
int g_c03ef_doc_ptr = 0;
int g_c041_val = 0; /* C041_EN_25SEC_INTS, C041_EN_MOVE_INTS */
int g_c046_val = 0;
int g_c05x_annuncs = 0;
int g_c068_statereg = 0;
int g_c08x_wrdefram = 0;
int g_zipgs_unlock = 0;
int g_zipgs_reg_c059 = 0x5f;
// 7=LC cache dis, 6==5ms paddle del en, 5==5ms ext del en,
// 4==5ms c02e enab, 3==CPS follow enab, 2-0: 111
int g_zipgs_reg_c05a = 0x0f;
// 7:4 = current ZIP speed, 0=100%, 1=93.75%, F=6.25%
// 3:0: always 1111
int g_zipgs_reg_c05b = 0x40;
// 7==1ms clock, 6==cshupd: tag data at c05f updated
// 5==LC cache disable, 4==bd is disabled, 3==delay in effect,
// 2==rombank, 1-0==ram size (00:8K, 01=16K, 10=32K, 11=64K)
int g_zipgs_reg_c05c = 0x00;
// 7:1==slot delay enable (for 52-54ms), 0==speaker 5ms delay
#define EMUSTATE(a) { #a, &a }
Emustate_intlist g_emustate_intlist[] = {
EMUSTATE(g_cur_a2_stat),
EMUSTATE(g_paddle_buttons),
EMUSTATE(g_em_emubyte_cnt),
EMUSTATE(g_irq_pending),
EMUSTATE(g_c023_val),
EMUSTATE(g_c029_val_some),
EMUSTATE(g_c02b_val),
EMUSTATE(g_c02d_int_crom),
EMUSTATE(g_c031_disk35),
EMUSTATE(g_c033_data),
EMUSTATE(g_c034_val),
EMUSTATE(g_c035_shadow_reg),
EMUSTATE(g_c036_val_speed),
EMUSTATE(g_c03ef_doc_ptr),
EMUSTATE(g_c041_val),
EMUSTATE(g_c046_val),
EMUSTATE(g_c05x_annuncs),
EMUSTATE(g_c068_statereg),
EMUSTATE(g_c08x_wrdefram),
EMUSTATE(g_zipgs_unlock),
EMUSTATE(g_zipgs_reg_c059),
EMUSTATE(g_zipgs_reg_c05a),
EMUSTATE(g_zipgs_reg_c05b),
EMUSTATE(g_zipgs_reg_c05c),
{ 0, 0, }
};
extern double g_paddle_trig_dcycs;
extern double g_last_vbl_dcycs;
Emustate_dbllist g_emustate_dbllist[] = {
EMUSTATE(g_paddle_trig_dcycs),
EMUSTATE(g_last_vbl_dcycs),
{ 0, 0, }
};
extern word32 g_mem_size_total;
Emustate_word32list g_emustate_word32list[] = {
EMUSTATE(g_mem_size_total),
{ 0, 0, }
};
#define UNIMPL_READ \
halt_printf("UNIMP READ to addr %08x\n", loc); \
return 0;
#define UNIMPL_WRITE \
halt_printf("UNIMP WRITE to addr %08x, val: %04x\n", loc, val); \
return;
//#ifdef _WINDOWS
// OG Added Transwarp ROM
#define TRANSWARP
int transwarp_low_val = 0;
#ifdef _WIN32
__declspec(align(256))
#endif
unsigned char transwarpcode[][32]
#if !defined(_WIN32) && !defined(__OS2__)
__attribute__ ((aligned(256)))
#endif
={
{
/*0xBCFF00*/ 'T','W','G','S',0,0,0,0,0,0,0,0,0,0,0,0,
/*0xBCFF10*/ 0x5C,0x40,0xFF,0xBC, // JMP GetMaxSpeed
/*0xBCFF14*/ 0x5C,0x60,0xFF,0xBC, // JMP GetNumISpeed
/*0xBCFF18*/ 0x6B,0x00,0x00,0x00, // ???
/*0xBCFF1C*/ 0x6B,0x00,0x00,0x00 // ???
},
{
/*0xBCFF20*/ 0x5C,0x80,0xFF,0xBC, // JMP GetCurSpeed
/*0xBCFF24*/ 0x5C,0xA0,0xFF,0xBC, // JMP SetCurSpeed
/*0xBCFF28*/ 0x5C,0xC0,0xFF,0xBC, // JMP GetCurISpeed
/*0xBCFF2C*/ 0x5C,0xE0,0xFF,0xBC, // JMP SetCurISpeed
/*0xBCFF30*/ 0x6B,0x00,0x00,0x00, // ???
/*0xBCFF34*/ 0x6B,0x00,0x00,0x00, // ???
/*0xBCFF38*/ 0x6B,0x00,0x00,0x00, // ???
/*0xBCFF3C*/ 0x6B,0x00,0x00,0x00 // GetTWConfig
},
{
/* 0xBCFF40*/ // GetMaxSpeed
#define ZIP_SPEED 8000
0xA9, ZIP_SPEED & 0xFF, (ZIP_SPEED >> 8) &0xFF, // LDA 0x1F40 // Max Speed = 8.0Mhz
0x6B, // RTL
0x00,0x00,0x00,0x00, //4
0x00,0x00,0x00,0x00, //8
0x6B,0x00,0x00,0x00, //C Space Shark calls this address ???
},
{
/* 0xBCFF60*/ //GetNumISpeed
0xA9,0x02,0x00, // LDA 0x0002 // 0=slow, 1=normal, 2=warp
0x6B, // RTL
},
{
/* 0xBCFF80*/ //GetCurSpeed
0xAF, 0x6A, 0xC0, 0x00, // LDA 0xC06A (/6B)
0x6B, // RTL
},
{
/* 0xBCFFA0*/ //SetCurSpeed
0x8F, 0x6A, 0xC0, 0x00, // STA 0xC06A (/6B)
0x6B, // RTL
},
{
/* 0xBCFFC0*/ //GetCurISpeed
0x48, // PHA
0xAF, 0x6C, 0xC0, 0x00, // LDA 0xC06C (/6D)
0xAA, // TAX
0x68, // PLA
0x6B, // RTL
},
{
/* 0xBCFFE0*/ //SetCurISpeed
0x48, // PHA
0x8A, // TXA
0x8F, 0x6C, 0xC0, 0x00, // STA 0xC06C (/6D)
0x68, // PLA
0x6B, // RTL
}
}
;
// OG Added moremem_init()
void moremem_init()
{
g_em_emubyte_cnt = 0;
g_paddle_buttons = 0;
g_irq_pending = 0;
g_c023_val = 0;
g_c029_val_some = 0x41;
g_c02b_val = 0x08;
g_c02d_int_crom = 0;
g_c031_disk35 = 0;
g_c034_val = 0;
g_c035_shadow_reg = 0x08;
g_c036_val_speed = 0x80;
g_c03ef_doc_ptr = 0;
g_c041_val = 0; /* C041_EN_25SEC_INTS, C041_EN_MOVE_INTS */
g_c046_val = 0;
g_c05x_annuncs = 0;
g_c068_statereg = 0;
g_c08x_wrdefram = 0;
g_zipgs_unlock = 0;
g_zipgs_reg_c059 = 0x5f;
g_zipgs_reg_c05a = 0x0f;
g_zipgs_reg_c05b = 0x40;
g_zipgs_reg_c05c = 0x00;
}
void
fixup_brks()
{
word32 page;
word32 tmp, tmp2;
Pg_info val;
int is_wr_only;
int i, num;
num = g_num_breakpoints;
for(i = 0; i < num; i++) {
page = (g_breakpts[i] >> 8) & 0xffff;
is_wr_only = (g_breakpts[i] >> 24) & 1;
if(!is_wr_only) {
val = GET_PAGE_INFO_RD(page);
tmp = PTR2WORD(val) & 0xff;
tmp2 = tmp | BANK_IO_TMP | BANK_BREAK;
SET_PAGE_INFO_RD(page, val - tmp + tmp2);
}
val = GET_PAGE_INFO_WR(page);
tmp = PTR2WORD(val) & 0xff;
tmp2 = tmp | BANK_IO_TMP | BANK_BREAK;
SET_PAGE_INFO_WR(page, val - tmp + tmp2);
}
}
void
fixup_hires_on()
{
if((g_cur_a2_stat & ALL_STAT_ST80) == 0) {
return;
}
fixup_bank0_2000_4000();
fixup_brks();
}
void
fixup_bank0_2000_4000()
{
byte *mem0rd;
byte *mem0wr;
mem0rd = &(g_memory_ptr[0x2000]);
mem0wr = mem0rd;
if((g_cur_a2_stat & ALL_STAT_ST80) && (g_cur_a2_stat & ALL_STAT_HIRES)){
if(g_cur_a2_stat & ALL_STAT_PAGE2) {
mem0rd += 0x10000;
mem0wr += 0x10000;
if((g_c035_shadow_reg & 0x12) == 0 ||
(g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
} else if((g_c035_shadow_reg & 0x02) == 0) {
mem0wr += BANK_SHADOW;
}
} else {
if(RAMRD) {
mem0rd += 0x10000;
}
if(RAMWRT) {
mem0wr += 0x10000;
if((g_c035_shadow_reg & 0x12) == 0 ||
(g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
} else if((g_c035_shadow_reg & 0x02) == 0) {
mem0wr += BANK_SHADOW;
}
}
fixup_any_bank_any_page(0x20, 0x20, mem0rd, mem0wr);
}
void
fixup_bank0_0400_0800()
{
byte *mem0rd;
byte *mem0wr;
int shadow;
mem0rd = &(g_memory_ptr[0x400]);
mem0wr = mem0rd;
shadow = BANK_SHADOW;
if(g_cur_a2_stat & ALL_STAT_ST80) {
if(g_cur_a2_stat & ALL_STAT_PAGE2) {
shadow = BANK_SHADOW2;
mem0rd += 0x10000;
mem0wr += 0x10000;
}
} else {
if(RAMWRT) {
shadow = BANK_SHADOW2;
mem0wr += 0x10000;
}
if(RAMRD) {
mem0rd += 0x10000;
}
}
if((g_c035_shadow_reg & 0x01) == 0) {
mem0wr += shadow;
}
fixup_any_bank_any_page(0x4, 4, mem0rd, mem0wr);
}
void
fixup_any_bank_any_page(int start_page, int num_pages, byte *mem0rd,
byte *mem0wr)
{
int i;
for(i = 0; i < num_pages; i++) {
SET_PAGE_INFO_RD(i + start_page, mem0rd);
mem0rd += 0x100;
}
for(i = 0; i < num_pages; i++) {
SET_PAGE_INFO_WR(i + start_page, mem0wr);
mem0wr += 0x100;
}
}
void
fixup_intcx()
{
byte *rom10000;
byte *rom_inc;
int no_io_shadow;
int off;
int start_k;
word32 mask;
int j, k;
rom10000 = &(g_rom_fc_ff_ptr[0x30000]);
no_io_shadow = (g_c035_shadow_reg & 0x40);
start_k = 0;
if(no_io_shadow) {
/* if not shadowing, banks 0 and 1 are not affected by intcx */
start_k = 2;
}
for(k = start_k; k < 4; k++) {
off = k;
if(k >= 2) {
off += (0xe0 - 2);
}
/* step off through 0x00, 0x01, 0xe0, 0xe1 */
off = off << 8;
SET_PAGE_INFO_RD(0xc0 + off, SET_BANK_IO);
for(j = 0xc1; j < 0xc8; j++) {
mask = 1 << (j & 0xf);
if(j < 0xc8) {
rom_inc = SET_BANK_IO;
if(((g_c02d_int_crom & mask) == 0) || INTCX) {
rom_inc = rom10000 + (j << 8);
} else {
// User-slot rom
rom_inc = &(g_rom_cards_ptr[0]) +
((j - 0xc0) << 8);
}
SET_PAGE_INFO_RD(j + off, rom_inc);
}
}
for(j = 0xc8; j < 0xd0; j++) {
/*c800 - cfff */
if(((g_c02d_int_crom & (1 << 3)) == 0) || INTCX)
{
rom_inc = rom10000 + (j << 8);
}
else
{
rom_inc = rom10000 + (j << 8);
}
SET_PAGE_INFO_RD(j + off, rom_inc);
}
iostrobe = 0;
for(j = 0xc0; j < 0xd0; j++) {
SET_PAGE_INFO_WR(j + off, SET_BANK_IO);
}
}
if(!no_io_shadow) {
SET_PAGE_INFO_RD(0xc7, SET_BANK_IO); /* smartport */
}
fixup_brks();
}
void
fixup_wrdefram(int new_wrdefram)
{
byte *mem0wr;
byte *wrptr;
int j;
g_c08x_wrdefram = new_wrdefram;
if(g_c035_shadow_reg & 0x40) {
/* do nothing */
return;
}
/* if shadowing, banks 0 and 1 are affected by wrdefram */
mem0wr = &(g_memory_ptr[0]);
if(!new_wrdefram) {
mem0wr += (BANK_IO_TMP | BANK_IO2_TMP);
}
wrptr = mem0wr + 0x1e000;
for(j = 0x1e0; j < 0x200; j++) {
SET_PAGE_INFO_WR(j, wrptr);
wrptr += 0x100;
}
wrptr = mem0wr + 0x0e000;
if(ALTZP) {
wrptr += 0x10000;
}
for(j = 0xe0; j < 0x100; j++) {
SET_PAGE_INFO_WR(j, wrptr);
wrptr += 0x100;
}
wrptr = mem0wr + 0x1d000;
if(! LCBANK2) {
wrptr -= 0x1000;
}
for(j = 0x1d0; j < 0x1e0; j++) {
SET_PAGE_INFO_WR(j, wrptr);
wrptr += 0x100;
}
wrptr = mem0wr + 0xd000;
if(! LCBANK2) {
wrptr -= 0x1000;
}
if(ALTZP) {
wrptr += 0x10000;
}
for(j = 0xd0; j < 0xe0; j++) {
SET_PAGE_INFO_WR(j, wrptr);
wrptr += 0x100;
}
fixup_brks();
}
void
fixup_st80col(double dcycs)
{
int cur_a2_stat;
cur_a2_stat = g_cur_a2_stat;
fixup_bank0_0400_0800();
if(cur_a2_stat & ALL_STAT_HIRES) {
/* fixup no matter what PAGE2 since PAGE2 and RAMRD/WR */
/* can work against each other */
fixup_bank0_2000_4000();
}
if(cur_a2_stat & ALL_STAT_PAGE2) {
change_display_mode(dcycs);
}
fixup_brks();
}
void
fixup_altzp()
{
byte *mem0rd, *mem0wr;
int rdrom, c08x_wrdefram;
int altzp;
altzp = ALTZP;
mem0rd = &(g_memory_ptr[0]);
if(altzp) {
mem0rd += 0x10000;
}
SET_PAGE_INFO_RD(0, mem0rd);
SET_PAGE_INFO_RD(1, mem0rd + 0x100);
SET_PAGE_INFO_WR(0, mem0rd);
SET_PAGE_INFO_WR(1, mem0rd + 0x100);
mem0rd = &(g_memory_ptr[0xd000]);
mem0wr = mem0rd;
c08x_wrdefram = g_c08x_wrdefram;
rdrom = RDROM;
if(g_c035_shadow_reg & 0x40) {
if(ALTZP) {
mem0rd += 0x10000;
}
fixup_any_bank_any_page(0xd0, 0x10, mem0rd - 0x1000,
mem0rd - 0x1000);
c08x_wrdefram = 1;
rdrom = 0;
} else {
if(!c08x_wrdefram) {
mem0wr += (BANK_IO_TMP | BANK_IO2_TMP);
}
if(ALTZP) {
mem0rd += 0x10000;
mem0wr += 0x10000;
}
if(! LCBANK2) {
mem0rd -= 0x1000;
mem0wr -= 0x1000;
}
if(rdrom) {
mem0rd = &(g_rom_fc_ff_ptr[0x3d000]);
}
fixup_any_bank_any_page(0xd0, 0x10, mem0rd, mem0wr);
}
mem0rd = &(g_memory_ptr[0xe000]);
mem0wr = mem0rd;
if(!c08x_wrdefram) {
mem0wr += (BANK_IO_TMP | BANK_IO2_TMP);
}
if(ALTZP) {
mem0rd += 0x10000;
mem0wr += 0x10000;
}
if(rdrom) {
mem0rd = &(g_rom_fc_ff_ptr[0x3e000]);
}
fixup_any_bank_any_page(0xe0, 0x20, mem0rd, mem0wr);
/* No need for fixup_brks since called from set_statereg() */
}
void
fixup_page2(double dcycs)
{
if((g_cur_a2_stat & ALL_STAT_ST80)) {
fixup_bank0_0400_0800();
if((g_cur_a2_stat & ALL_STAT_HIRES)) {
fixup_bank0_2000_4000();
}
} else {
change_display_mode(dcycs);
}
}
void
fixup_ramrd()
{
byte *mem0rd;
int cur_a2_stat;
int j;
cur_a2_stat = g_cur_a2_stat;
if((cur_a2_stat & ALL_STAT_ST80) == 0) {
fixup_bank0_0400_0800();
}
if( ((cur_a2_stat & ALL_STAT_ST80) == 0) ||
((cur_a2_stat & ALL_STAT_HIRES) == 0) ) {
fixup_bank0_2000_4000();
}
mem0rd = &(g_memory_ptr[0x0000]);
if(RAMRD) {
mem0rd += 0x10000;
}
SET_PAGE_INFO_RD(2, mem0rd + 0x200);
SET_PAGE_INFO_RD(3, mem0rd + 0x300);
for(j = 8; j < 0x20; j++) {
SET_PAGE_INFO_RD(j, mem0rd + j*0x100);
}
for(j = 0x40; j < 0xc0; j++) {
SET_PAGE_INFO_RD(j, mem0rd + j*0x100);
}
/* No need for fixup_brks since only called from set_statereg() */
}
void
fixup_ramwrt()
{
byte *mem0wr;
int cur_a2_stat;
int shadow;
int ramwrt;
int j;
cur_a2_stat = g_cur_a2_stat;
if((cur_a2_stat & ALL_STAT_ST80) == 0) {
fixup_bank0_0400_0800();
}
if( ((cur_a2_stat & ALL_STAT_ST80) == 0) ||
((cur_a2_stat & ALL_STAT_HIRES) == 0) ) {
fixup_bank0_2000_4000();
}
mem0wr = &(g_memory_ptr[0x0000]);
ramwrt = RAMWRT;
if(ramwrt) {
mem0wr += 0x10000;
}
SET_PAGE_INFO_WR(2, mem0wr + 0x200);
SET_PAGE_INFO_WR(3, mem0wr + 0x300);
shadow = BANK_SHADOW;
if(ramwrt) {
shadow = BANK_SHADOW2;
}
if( ((g_c035_shadow_reg & 0x20) != 0) ||
((g_rom_version < 3) && !g_user_page2_shadow)) {
shadow = 0;
}
for(j = 8; j < 0x0c; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100 + shadow);
}
for(j = 0xc; j < 0x20; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100);
}
shadow = 0;
if(ramwrt) {
if((g_c035_shadow_reg & 0x14) == 0 ||
(g_c035_shadow_reg & 0x08) == 0) {
shadow = BANK_SHADOW2;
}
} else if((g_c035_shadow_reg & 0x04) == 0) {
shadow = BANK_SHADOW;
}
for(j = 0x40; j < 0x60; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100 + shadow);
}
shadow = 0;
if(ramwrt && (g_c035_shadow_reg & 0x08) == 0) {
/* shr shadowing */
shadow = BANK_SHADOW2;
}
for(j = 0x60; j < 0xa0; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100 + shadow);
}
for(j = 0xa0; j < 0xc0; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100);
}
/* No need for fixup_brks() since only called from set_statereg() */
}
void
fixup_lcbank2()
{
byte *mem0rd, *mem0wr;
int lcbank2, c08x_wrdefram, rdrom;
int off;
int k;
for(k = 0; k < 4; k++) {
off = k;
if(k >= 2) {
off += (0xe0 - 2);
}
/* step off through 0x00, 0x01, 0xe0, 0xe1 */
if(k < 2) {
mem0rd = &(g_memory_ptr[k << 16]);
} else {
mem0rd = &(g_slow_memory_ptr[(k & 1) << 16]);
}
if((k == 0) && ALTZP) {
mem0rd += 0x10000;
}
lcbank2 = LCBANK2;
c08x_wrdefram = g_c08x_wrdefram;
rdrom = RDROM;
if((k < 2) && (g_c035_shadow_reg & 0x40)) {
lcbank2 = 0;
c08x_wrdefram = 1;
rdrom = 0;
}
if(! lcbank2) {
mem0rd -= 0x1000; /* lcbank1, use 0xc000-cfff */
}
mem0wr = mem0rd;
if((k < 2) && !c08x_wrdefram) {
mem0wr += (BANK_IO_TMP | BANK_IO2_TMP);
}
if((k < 2) && rdrom) {
mem0rd = &(g_rom_fc_ff_ptr[0x30000]);
}
fixup_any_bank_any_page(off*0x100 + 0xd0, 0x10,
mem0rd + 0xd000, mem0wr + 0xd000);
}
/* No need for fixup_brks() since only called from set_statereg(), */
/* or from other routines which will handle it */
}
void
fixup_rdrom()
{
byte *mem0rd;
int j, k;
/* fixup_lcbank2 handles 0xd000-dfff for rd & wr*/
fixup_lcbank2();
for(k = 0; k < 2; k++) {
/* k is the bank */
mem0rd = &(g_memory_ptr[k << 16]);
if((k == 0) && ALTZP) {
mem0rd += 0x10000;
}
if((g_c035_shadow_reg & 0x40) == 0) {
if(RDROM) {
mem0rd = &(g_rom_fc_ff_ptr[0x30000]);
}
}
for(j = 0xe0; j < 0x100; j++) {
SET_PAGE_INFO_RD(j + k*0x100, mem0rd + j*0x100);
}
}
/* No need for fixup_brks() since only called from set_statereg() */
}
void
set_statereg(double dcycs, int val)
{
int _xor; // OG renamed xor to _xor
_xor = val ^ g_c068_statereg;
g_c068_statereg = val;
if(_xor == 0) {
return;
}
if(_xor & 0x80) {
/* altzp */
fixup_altzp();
}
if(_xor & 0x40) {
/* page2 */
g_cur_a2_stat = (g_cur_a2_stat & ~ALL_STAT_PAGE2) |
(val & ALL_STAT_PAGE2);
fixup_page2(dcycs);
}
if(_xor & 0x20) {
/* RAMRD */
fixup_ramrd();
}
if(_xor & 0x10) {
/* RAMWRT */
fixup_ramwrt();
}
if(_xor & 0x08) {
/* RDROM */
fixup_rdrom();
}
if(_xor & 0x04) {
/* LCBANK2 */
fixup_lcbank2();
}
if(_xor & 0x02) {
/* ROMBANK */
halt_printf("Just set rombank = %d\n", ROMB);
}
if(_xor & 0x01) {
fixup_intcx();
}
if(_xor) {
fixup_brks();
}
}
void
fixup_shadow_txt1()
{
byte *mem0wr;
int j;
fixup_bank0_0400_0800();
mem0wr = &(g_memory_ptr[0x10000]);
if((g_c035_shadow_reg & 0x01) == 0) {
mem0wr += BANK_SHADOW2;
}
for(j = 4; j < 8; j++) {
SET_PAGE_INFO_WR(0x100 + j, mem0wr + j*0x100);
}
}
void
fixup_shadow_txt2()
{
byte *mem0wr;
int shadow;
int j;
/* bank 0 */
mem0wr = &(g_memory_ptr[0x00000]);
shadow = BANK_SHADOW;
if(RAMWRT) {
mem0wr += 0x10000;
shadow = BANK_SHADOW2;
}
if(((g_c035_shadow_reg & 0x20) == 0) &&
((g_rom_version >= 3) || g_user_page2_shadow)) {
mem0wr += shadow;
}
for(j = 8; j < 0xc; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100);
}
/* and bank 1 */
mem0wr = &(g_memory_ptr[0x10000]);
if(((g_c035_shadow_reg & 0x20) == 0) &&
((g_rom_version >= 3) || g_user_page2_shadow)) {
mem0wr += BANK_SHADOW2;
}
for(j = 8; j < 0xc; j++) {
SET_PAGE_INFO_WR(0x100 + j, mem0wr + j*0x100);
}
}
void
fixup_shadow_hires1()
{
byte *mem0wr;
int j;
fixup_bank0_2000_4000();
/* and bank 1 */
mem0wr = &(g_memory_ptr[0x10000]);
if((g_c035_shadow_reg & 0x12) == 0 || (g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
for(j = 0x20; j < 0x40; j++) {
SET_PAGE_INFO_WR(0x100 + j, mem0wr + j*0x100);
}
}
void
fixup_shadow_hires2()
{
byte *mem0wr;
int j;
/* bank 0 */
mem0wr = &(g_memory_ptr[0x00000]);
if(RAMWRT) {
mem0wr += 0x10000;
if((g_c035_shadow_reg & 0x14) == 0 ||
(g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
} else if((g_c035_shadow_reg & 0x04) == 0) {
mem0wr += BANK_SHADOW;
}
for(j = 0x40; j < 0x60; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100);
}
/* and bank 1 */
mem0wr = &(g_memory_ptr[0x10000]);
if((g_c035_shadow_reg & 0x14) == 0 || (g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
for(j = 0x40; j < 0x60; j++) {
SET_PAGE_INFO_WR(0x100 + j, mem0wr + j*0x100);
}
}
void
fixup_shadow_shr()
{
byte *mem0wr;
int j;
/* bank 0, only pages 0x60 - 0xa0 */
mem0wr = &(g_memory_ptr[0x00000]);
if(RAMWRT) {
mem0wr += 0x10000;
if((g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
}
for(j = 0x60; j < 0xa0; j++) {
SET_PAGE_INFO_WR(j, mem0wr + j*0x100);
}
/* and bank 1, only pages 0x60 - 0xa0 */
mem0wr = &(g_memory_ptr[0x10000]);
if((g_c035_shadow_reg & 0x8) == 0) {
mem0wr += BANK_SHADOW2;
}
for(j = 0x60; j < 0xa0; j++) {
SET_PAGE_INFO_WR(0x100 + j, mem0wr + j*0x100);
}
}
void
fixup_shadow_iolc()
{
byte *mem0rd;
int k;
if(g_c035_shadow_reg & 0x40) {
/* Disable language card area */
for(k = 0; k < 2; k++) {
mem0rd = &(g_memory_ptr[k << 16]);
fixup_any_bank_any_page((k << 8) + 0xc0, 0x10,
mem0rd + 0xd000, mem0rd + 0xd000);
if(k == 0 && ALTZP) {
mem0rd += 0x10000;
}
fixup_any_bank_any_page((k << 8) + 0xd0, 0x10,
mem0rd + 0xc000, mem0rd + 0xc000);
fixup_any_bank_any_page((k << 8) + 0xe0, 0x20,
mem0rd + 0xe000, mem0rd + 0xe000);
}
} else {
/* 0xc000 area */
fixup_intcx();
/* 0xd000 area */
/* fixup_lcbank2(); -- not needed since fixup_rdrom does it */
/* Fix 0xd000-0xffff for reads, banks 0 and 1 */
fixup_rdrom(); /* which calls fixup_lcbank2 */
/* Fix 0xd000-0xffff for writes, banks 0 and 1 */
fixup_wrdefram(g_c08x_wrdefram);
}
}
void
update_shadow_reg(int val)
{
int _xor;
if(g_c035_shadow_reg == val) {
return;
}
_xor = g_c035_shadow_reg ^ val;
g_c035_shadow_reg = val;
if(_xor & 8) {
fixup_shadow_hires1();
fixup_shadow_hires2();
fixup_shadow_shr();
_xor = _xor & (~0x16);
}
if(_xor & 0x10) {
fixup_shadow_hires1();
fixup_shadow_hires2();
_xor = _xor & (~0x6);
}
if(_xor & 2) {
fixup_shadow_hires1();
}
if(_xor & 4) {
fixup_shadow_hires2();
}
if(_xor & 1) {
fixup_shadow_txt1();
}
if((_xor & 0x20) && ((g_rom_version >= 3) || g_user_page2_shadow)) {
fixup_shadow_txt2();
}
if(_xor & 0x40) {
fixup_shadow_iolc();
}
if(_xor) {
fixup_brks();
}
}
void
fixup_shadow_all_banks()
{
byte *mem0rd;
int shadow;
int num_banks;
int j, k;
/* Assume Ninja Force Megademo */
/* only do banks 3 - num_banks by 2, shadowing into e1 */
shadow = 0;
if((g_c036_val_speed & 0x10) && ((g_c035_shadow_reg & 0x08) == 0)) {
shadow = BANK_SHADOW2;
}
num_banks = g_mem_size_total >> 16;
for(k = 3; k < num_banks; k += 2) {
mem0rd = &(g_memory_ptr[k*0x10000 + 0x2000]) + shadow;
for(j = 0x20; j < 0xa0; j++) {
SET_PAGE_INFO_WR(k*0x100 + j, mem0rd);
mem0rd += 0x100;
}
}
fixup_brks();
}
void
setup_pageinfo()
{
byte *mem0rd;
word32 mem_size_pages;
/* first, set all of memory to point to itself */
mem_size_pages = g_mem_size_total >> 8;
mem0rd = &(g_memory_ptr[0]);
fixup_any_bank_any_page(0, mem_size_pages, mem0rd, mem0rd);
/* mark unused memory as BAD_MEM */
fixup_any_bank_any_page(mem_size_pages, 0xfc00-mem_size_pages,
BANK_BAD_MEM, BANK_BAD_MEM);
fixup_shadow_all_banks();
/* ROM */
mem0rd = &(g_rom_fc_ff_ptr[0]);
fixup_any_bank_any_page(0xfc00, 0x400, mem0rd,
mem0rd + (BANK_IO_TMP | BANK_IO2_TMP));
/* banks e0, e1 */
mem0rd = &(g_slow_memory_ptr[0]);
fixup_any_bank_any_page(0xe000, 0x04, mem0rd + 0x0000, mem0rd + 0x0000);
fixup_any_bank_any_page(0xe004, 0x08, mem0rd + 0x0400,
mem0rd + 0x0400 + BANK_SHADOW);
fixup_any_bank_any_page(0xe00c, 0x14, mem0rd + 0x0c00, mem0rd + 0x0c00);
fixup_any_bank_any_page(0xe020, 0x40, mem0rd + 0x2000,
mem0rd + 0x2000 + BANK_SHADOW);
fixup_any_bank_any_page(0xe060, 0xa0, mem0rd + 0x6000, mem0rd + 0x6000);
mem0rd = &(g_slow_memory_ptr[0x10000]);
fixup_any_bank_any_page(0xe100, 0x04, mem0rd + 0x0000, mem0rd + 0x0000);
fixup_any_bank_any_page(0xe104, 0x08, mem0rd + 0x0400,
mem0rd + 0x0400 + BANK_SHADOW2);
fixup_any_bank_any_page(0xe10c, 0x14, mem0rd + 0x0c00, mem0rd + 0x0c00);
fixup_any_bank_any_page(0xe120, 0x80, mem0rd + 0x2000,
mem0rd + 0x2000 + BANK_SHADOW2);
fixup_any_bank_any_page(0xe1a0, 0x60, mem0rd + 0xa000, mem0rd + 0xa000);
fixup_intcx(); /* correct banks 0xe0,0xe1, 0xc000-0xcfff area */
fixup_lcbank2(); /* correct 0xd000-0xdfff area */
fixup_bank0_2000_4000();
fixup_bank0_0400_0800();
fixup_wrdefram(g_c08x_wrdefram);
fixup_altzp();
fixup_ramrd();
fixup_ramwrt();
fixup_rdrom();
fixup_shadow_txt1();
fixup_shadow_txt2();
fixup_shadow_hires1();
fixup_shadow_hires2();
fixup_shadow_shr();
fixup_shadow_iolc();
fixup_brks();
#ifdef TRANSWARP // OG adding Transwarp code
SET_PAGE_INFO_RD(0xBCFF,transwarpcode);
#endif
}
void
show_bankptrs_bank0rdwr()
{
show_bankptrs(0);
show_bankptrs(1);
show_bankptrs(0xe0);
show_bankptrs(0xe1);
printf("statereg: %02x\n", g_c068_statereg);
}
void
show_bankptrs(int bnk)
{
int i;
Pg_info rd, wr;
byte *ptr_rd, *ptr_wr;
printf("g_memory_ptr: %p, dummy_mem: %p, slow_mem_ptr: %p\n",
g_memory_ptr, g_dummy_memory1_ptr, g_slow_memory_ptr);
printf("g_rom_fc_ff_ptr: %p\n", g_rom_fc_ff_ptr);
printf("Showing bank_info array for %02x\n", bnk);
for(i = 0; i < 256; i++) {
rd = GET_PAGE_INFO_RD(bnk*0x100 + i);
wr = GET_PAGE_INFO_WR(bnk*0x100 + i);
ptr_rd = (byte *)rd;
ptr_wr = (byte *)wr;
printf("%04x rd: ", bnk*256 + i);
show_addr(ptr_rd);
printf(" wr: ");
show_addr(ptr_wr);
printf("\n");
}
}
// function to get the pointer to memory where a gs page is located - db
unsigned char * get_page_ptr_rd(int addr) {
Pg_info rd;
byte *ptr_rd;
int bank = ( addr & 0xFF0000 ) >> 16; // unnecessary conversion that we throw away below w/ "*0x100"
int page = ( addr & 0x00FF00 ) >> 8;
rd = GET_PAGE_INFO_RD(bank*0x100 + page);
ptr_rd = (byte *)rd;
//printf("ADDR %06x at pageptr %p\n",addr, ptr_rd); // seems to be correct.
/* code */
return rd;
}
// function to get a byte from a 24bit address - db
int get_byte_at_address(int addr)
{
unsigned char *page_ptr_rd = get_page_ptr_rd(addr);
int offset = addr & 0xff;
int mem_byte = page_ptr_rd[offset] & 0xff;
//printf("0x%06X = $%02X \t(dec) %d\n", addr, (int) mem_byte, (int) mem_byte);
return (int) mem_byte;
}
// function to set a byte from a 24bit address - db
void set_byte_at_address(int addr, int value)
{
unsigned char *page_ptr_rd = get_page_ptr_rd(addr);
int offset = addr & 0xff;
page_ptr_rd[offset] = value;
}
void
show_addr(byte *ptr)
{
word32 mem_size;
mem_size = g_mem_size_total;
if(ptr >= g_memory_ptr && ptr < &g_memory_ptr[mem_size]) {
printf("%p--memory[%06x]", ptr,
(word32)(ptr - g_memory_ptr));
} else if(ptr >= g_rom_fc_ff_ptr && ptr < &g_rom_fc_ff_ptr[256*1024]) {
printf("%p--rom_fc_ff[%06x]", ptr,
(word32)(ptr - g_rom_fc_ff_ptr));
} else if(ptr >= g_slow_memory_ptr && ptr<&g_slow_memory_ptr[128*1024]){
printf("%p--slow_memory[%06x]", ptr,
(word32)(ptr - g_slow_memory_ptr));
} else if(ptr >=g_dummy_memory1_ptr && ptr < &g_dummy_memory1_ptr[256]){
printf("%p--dummy_memory[%06x]", ptr,
(word32)(ptr - g_dummy_memory1_ptr));
} else {
printf("%p--unknown", ptr);
}
}
#define CALC_DCYCS_FROM_CYC_PTR(dcycs, cyc_ptr, fcyc, new_fcyc) \
dcycs = g_last_vbl_dcycs + *cyc_ptr;
int
io_read(word32 loc, double *cyc_ptr)
{
double dcycs;
word64 word64_tmp;
#if 0
double fcyc, new_fcyc;
#endif
word32 mask;
int new_lcbank2;
int new_wrdefram;
int tmp;
int i;
CALC_DCYCS_FROM_CYC_PTR(dcycs, cyc_ptr, fcyc, new_fcyc);
/* IO space */
switch((loc >> 8) & 0xf) {
case 0: /* 0xc000 - 0xc0ff */
switch(loc & 0xff) {
/* 0xc000 - 0xc00f */
case 0x00: case 0x01: case 0x02: case 0x03:
case 0x04: case 0x05: case 0x06: case 0x07:
case 0x08: case 0x09: case 0x0a: case 0x0b:
case 0x0c: case 0x0d: case 0x0e: case 0x0f:
return(adb_read_c000());
/* 0xc010 - 0xc01f */
case 0x10: /* c010 */
return(adb_access_c010());
case 0x11: /* c011 = RDLCBANK2 */
return IOR(LCBANK2);
case 0x12: /* c012= RDLCRAM */
return IOR(!RDROM);
case 0x13: /* c013=rdramd */
return IOR(RAMRD);
case 0x14: /* c014=rdramwrt */
return IOR(RAMWRT);
case 0x15: /* c015 = INTCX */
return IOR(INTCX);
case 0x16: /* c016: ALTZP */
return IOR(ALTZP);
case 0x17: /* c017: rdc3rom */
return IOR(g_c02d_int_crom & (1 << 3));
case 0x18: /* c018: rd80c0l */
return IOR((g_cur_a2_stat & ALL_STAT_ST80));
case 0x19: /* c019: rdvblbar */
tmp = in_vblank(dcycs);
return IOR(tmp);
case 0x1a: /* c01a: rdtext */
return IOR(g_cur_a2_stat & ALL_STAT_TEXT);
case 0x1b: /* c01b: rdmix */
return IOR(g_cur_a2_stat & ALL_STAT_MIX_T_GR);
case 0x1c: /* c01c: rdpage2 */
return IOR(g_cur_a2_stat & ALL_STAT_PAGE2);
case 0x1d: /* c01d: rdhires */
return IOR(g_cur_a2_stat & ALL_STAT_HIRES);
case 0x1e: /* c01e: altcharset on? */
return IOR(g_cur_a2_stat & ALL_STAT_ALTCHARSET);
case 0x1f: /* c01f: rd80vid */
return IOR(g_cur_a2_stat & ALL_STAT_VID80);
/* 0xc020 - 0xc02f */
case 0x20: /* 0xc020 */
/* Click cassette port */
return float_bus(dcycs);
case 0x21: /* 0xc021 */
/* Not documented, but let's return COLOR_C021 */
return IOR(g_cur_a2_stat & ALL_STAT_COLOR_C021);
case 0x22: /* 0xc022 */
return (g_cur_a2_stat >> BIT_ALL_STAT_BG_COLOR) & 0xff;
case 0x23: /* 0xc023 */
return g_c023_val;
case 0x24: /* 0xc024 */
return mouse_read_c024(dcycs);
case 0x25: /* 0xc025 */
return adb_read_c025();
case 0x26: /* 0xc026 */
return adb_read_c026();
case 0x27: /* 0xc027 */
return adb_read_c027();
case 0x28: /* 0xc028 */
UNIMPL_READ;
case 0x29: /* 0xc029 */
return((g_cur_a2_stat & 0xa0) | g_c029_val_some);
case 0x2a: /* 0xc02a */
#if 0
printf("Reading c02a...returning 0\n");
#endif
return 0;
case 0x2b: /* 0xc02b */
return g_c02b_val;
case 0x2c: /* 0xc02c */
/* printf("reading c02c, returning 0\n"); */
return 0;
case 0x2d: /* 0xc02d */
tmp = g_c02d_int_crom;
return tmp;
case 0x2e: /* 0xc02e */
case 0x2f: /* 0xc02f */
return read_vid_counters(loc, dcycs);
/* 0xc030 - 0xc03f */
case 0x30: /* 0xc030 */
/* click speaker */
doc_read_c030(dcycs);
return float_bus(dcycs);
case 0x31: /* 0xc031 */
/* 3.5" control */
return g_c031_disk35;
case 0x32: /* 0xc032 */
/* scan int */
return 0;
case 0x33: /* 0xc033 = CLOCKDATA*/
return g_c033_data;
case 0x34: /* 0xc034 = CLOCKCTL */
return g_c034_val;
case 0x35: /* 0xc035 */
return g_c035_shadow_reg;
case 0x36: /* 0xc036 = CYAREG */
return g_c036_val_speed;
case 0x37: /* 0xc037 */
return 0;
case 0x38: /* 0xc038 */
return scc_read_reg(1, dcycs);
case 0x39: /* 0xc039 */
return scc_read_reg(0, dcycs);
case 0x3a: /* 0xc03a */
return scc_read_data(1, dcycs);
case 0x3b: /* 0xc03b */
return scc_read_data(0, dcycs);
case 0x3c: /* 0xc03c */
/* doc control */
return doc_read_c03c(dcycs);
case 0x3d: /* 0xc03d */
return doc_read_c03d(dcycs);
case 0x3e: /* 0xc03e */
return (g_c03ef_doc_ptr & 0xff);
case 0x3f: /* 0xc03f */
return (g_c03ef_doc_ptr >> 8);
/* 0xc040 - 0xc04f */
case 0x40: /* 0xc040 */
/* cassette */
return 0;
case 0x41: /* 0xc041 */
return g_c041_val;
case 0x44: /* 0xc044 */
// SCC LAD A
return scc_read_lad(0);
case 0x45: /* 0xc045 */
// SCC LAD B
return scc_read_lad(1);
case 0x46: /* 0xc046 */
tmp = g_c046_val;
g_c046_val = (tmp & 0xbf) + ((tmp & 0x80) >> 1);
return tmp;
case 0x47: /* 0xc047 */
remove_irq(IRQ_PENDING_C046_25SEC |
IRQ_PENDING_C046_VBL);
g_c046_val &= 0xe7; /* clear vbl_int, 1/4sec int*/
return 0;
case 0x42: /* 0xc042 */
case 0x43: /* 0xc043 */
return 0;
case 0x4f: /* 0xc04f */
/* for information on c04f, see: */
/* www.sheppyware.net/tech/hardware/softswitches.html */
/* write to $c04f to start. Then read $c04f to get */
/* emulator ($16=sweet16, $fe=bernie II). */
/* Then read again to get version: $21 == 2.1 */
switch(g_em_emubyte_cnt) {
case 1:
g_em_emubyte_cnt = 2;
return 'G';
case 2:
g_em_emubyte_cnt = 0;
tmp = g_gsplus_version_str[0] - '0';
i = g_gsplus_version_str[2] - '0';
return ((tmp & 0xf) << 4) + (i & 0xf);
default:
g_em_emubyte_cnt = 0;
return 0;
}
case 0x48: /* 0xc048 */
case 0x49: /* 0xc049 */
case 0x4a: /* 0xc04a */
case 0x4b: /* 0xc04b */
case 0x4c: /* 0xc04c */
case 0x4d: /* 0xc04d */
case 0x4e: /* 0xc04e */
UNIMPL_READ;
/* 0xc050 - 0xc05f */
case 0x50: /* 0xc050 */
if(g_cur_a2_stat & ALL_STAT_TEXT) {
g_cur_a2_stat &= (~ALL_STAT_TEXT);
change_display_mode(dcycs);
}
return float_bus(dcycs);
case 0x51: /* 0xc051 */
if((g_cur_a2_stat & ALL_STAT_TEXT) == 0) {
g_cur_a2_stat |= (ALL_STAT_TEXT);
change_display_mode(dcycs);
}
return float_bus(dcycs);
case 0x52: /* 0xc052 */
if(g_cur_a2_stat & ALL_STAT_MIX_T_GR) {
g_cur_a2_stat &= (~ALL_STAT_MIX_T_GR);
change_display_mode(dcycs);
}
return float_bus(dcycs);
case 0x53: /* 0xc053 */
if((g_cur_a2_stat & ALL_STAT_MIX_T_GR) == 0) {
g_cur_a2_stat |= (ALL_STAT_MIX_T_GR);
change_display_mode(dcycs);
}
return float_bus(dcycs);
case 0x54: /* 0xc054 */
set_statereg(dcycs, g_c068_statereg & (~0x40));
return float_bus(dcycs);
case 0x55: /* 0xc055 */
set_statereg(dcycs, g_c068_statereg | 0x40);
return float_bus(dcycs);
case 0x56: /* 0xc056 */
if(g_cur_a2_stat & ALL_STAT_HIRES) {
g_cur_a2_stat &= (~ALL_STAT_HIRES);
fixup_hires_on();
change_display_mode(dcycs);
}
return float_bus(dcycs);
case 0x57: /* 0xc057 */
if((g_cur_a2_stat & ALL_STAT_HIRES) == 0) {
g_cur_a2_stat |= (ALL_STAT_HIRES);
fixup_hires_on();
change_display_mode(dcycs);
}
return float_bus(dcycs);
case 0x58: /* 0xc058 */
if(g_zipgs_unlock < 4) {
g_c05x_annuncs &= (~1);
}
return 0;
case 0x59: /* 0xc059 */
if(g_zipgs_unlock >= 4) {
return g_zipgs_reg_c059;
} else {
g_c05x_annuncs |= 1;
}
return 0;
case 0x5a: /* 0xc05a */
if(g_zipgs_unlock >= 4) {
return g_zipgs_reg_c05a;
} else {
g_c05x_annuncs &= (~2);
}
return 0;
case 0x5b: /* 0xc05b */
if(g_zipgs_unlock >= 4) {
word64_tmp = (word64)dcycs;
tmp = (word64_tmp >> 9) & 1;
return (tmp << 7) + (g_zipgs_reg_c05b & 0x7f);
} else {
g_c05x_annuncs |= 2;
}
return 0;
case 0x5c: /* 0xc05c */
if(g_zipgs_unlock >= 4) {
return g_zipgs_reg_c05c;
} else {
g_c05x_annuncs &= (~4);
}
return 0;
case 0x5d: /* 0xc05d */
if(g_zipgs_unlock >= 4) {
halt_printf("Reading ZipGS $c05d!\n");
} else {
g_c05x_annuncs |= 4;
}
return 0;
case 0x5e: /* 0xc05e */
if(g_zipgs_unlock >= 4) {
halt_printf("Reading ZipGS $c05e!\n");
} else if(g_cur_a2_stat & ALL_STAT_ANNUNC3) {
g_cur_a2_stat &= (~ALL_STAT_ANNUNC3);
change_display_mode(dcycs);
}
return 0;
case 0x5f: /* 0xc05f */
if(g_zipgs_unlock >= 4) {
halt_printf("Reading ZipGS $c05f!\n");
} else if((g_cur_a2_stat & ALL_STAT_ANNUNC3) == 0) {
g_cur_a2_stat |= (ALL_STAT_ANNUNC3);
change_display_mode(dcycs);
}
return 0;
/* 0xc060 - 0xc06f */
case 0x60: /* 0xc060 */
return IOR(g_paddle_buttons & 8);
case 0x61: /* 0xc061 */
return IOR(adb_is_cmd_key_down() ||
g_paddle_buttons & 1);
case 0x62: /* 0xc062 */
return IOR(adb_is_option_key_down() ||
g_paddle_buttons & 2);
case 0x63: /* 0xc063 */
return IOR(g_paddle_buttons & 4);
case 0x64: /* 0xc064 */
return read_paddles(dcycs, 0);
case 0x65: /* 0xc065 */
return read_paddles(dcycs, 1);
case 0x66: /* 0xc066 */
return read_paddles(dcycs, 2);
case 0x67: /* 0xc067 */
return read_paddles(dcycs, 3);
case 0x68: /* 0xc068 = STATEREG */
return g_c068_statereg;
case 0x69: /* 0xc069 */
/* Reserved reg, return 0 */
return 0;
// OG Transwarp Read Interface
#ifdef TRANSWARP
case 0x6a: /* 0xc06a */
{
extern double g_zip_pmhz;
return (int)(g_zip_pmhz*1000)&0xFF;
}
case 0x6b: /* 0xc06b */
{
extern double g_zip_pmhz;
return (((int)(g_zip_pmhz*1000))>>8)&0xFF;
}
case 0x6c: /* 0xc06c */
{
extern double g_zip_pmhz;
if (g_zip_pmhz==1.0) return 0; // slow
else if (g_zip_pmhz>=2.6) return 2; // warp
else return 1; // zip
}
#else
case 0x6a: /* 0xc06a */
case 0x6b: /* 0xc06b */
case 0x6c: /* 0xc06c */
#endif
case 0x6d: /* 0xc06d */
case 0x6e: /* 0xc06e */
case 0x6f: /* 0xc06f */
UNIMPL_READ;
/* 0xc070 - 0xc07f */
case 0x70: /* c070 */
paddle_trigger(dcycs);
return 0;
case 0x71: /* 0xc071 */
case 0x72: case 0x73:
case 0x74: case 0x75: case 0x76: case 0x77:
case 0x78: case 0x79: case 0x7a: case 0x7b:
case 0x7c: case 0x7d: case 0x7e: case 0x7f:
return g_rom_fc_ff_ptr[3*65536 + 0xc000 + (loc & 0xff)];
/* 0xc080 - 0xc08f */
case 0x80: case 0x81: case 0x82: case 0x83:
case 0x84: case 0x85: case 0x86: case 0x87:
case 0x88: case 0x89: case 0x8a: case 0x8b:
case 0x8c: case 0x8d: case 0x8e: case 0x8f:
new_lcbank2 = ((loc & 0x8) >> 1) ^ 0x4;
new_wrdefram = (loc & 1);
if(new_wrdefram != g_c08x_wrdefram) {
fixup_wrdefram(new_wrdefram);
}
switch(loc & 0x3) {
case 0x1: /* 0xc081 */
case 0x2: /* 0xc082 */
/* Read rom, set lcbank2 */
set_statereg(dcycs, (g_c068_statereg & ~(0x04))|
(new_lcbank2 | 0x08));
break;
case 0x0: /* 0xc080 */
case 0x3: /* 0xc083 */
/* Read ram (clear RDROM), set lcbank2 */
set_statereg(dcycs, (g_c068_statereg & ~(0x0c))|
(new_lcbank2));
break;
}
return float_bus(dcycs);
/* 0xc090 - 0xc09f */
case 0x90: case 0x91: case 0x92: case 0x93:
case 0x94: case 0x95: case 0x96: case 0x97:
case 0x98: case 0x99: case 0x9a: case 0x9b:
case 0x9c: case 0x9d: case 0x9e: case 0x9f:
if (g_parallel)
{
return parallel_read((word16)loc & 0xf);
}
else
{
UNIMPL_READ;
}
/* 0xc0a0 - 0xc0af */
case 0xa0: case 0xa1: case 0xa2: case 0xa3:
case 0xa4: case 0xa5: case 0xa6: case 0xa7:
case 0xa8: case 0xa9: case 0xaa: case 0xab:
case 0xac: case 0xad: case 0xae: case 0xaf:
return 0;
/* UNIMPL_READ; */
/* 0xc0b0 - 0xc0bf */
//case 0xb0:
/* c0b0: female voice tool033 look at this */
// return 0;
//case 0xb1: case 0xb2: case 0xb3:
//case 0xb4: case 0xb5: case 0xb6: case 0xb7:
//case 0xb9: case 0xba: case 0xbb:
//case 0xbc: case 0xbd: case 0xbe: case 0xbf:
/* UNIMPL_READ; */
// return 0;
/* c0b8: Second Sight card stuff: return 0 */
//case 0xb8:
// return 0;
// break;
#ifdef HAVE_TFE
/*Uthernet read access on slot 3*/
case 0xb0:
case 0xb1:
case 0xb2:
case 0xb3:
case 0xb4:
case 0xb5:
case 0xb6:
case 0xb7:
case 0xb8:
case 0xb9:
case 0xba:
case 0xbb:
case 0xbc:
case 0xbd:
case 0xbe:
case 0xbf:
if (tfe_enabled){
return tfe_read((word16)loc & 0xf);
}
else
{return 0;}
#endif
/* 0xc0c0 - 0xc0cf */
case 0xc0: case 0xc1: case 0xc2: case 0xc3:
case 0xc4: case 0xc5: case 0xc6: case 0xc7:
case 0xc8: case 0xc9: case 0xca: case 0xcb:
case 0xcc: case 0xcd: case 0xce: case 0xcf:
return 0;
/* 0xc0d0 - 0xc0df */
case 0xd0: case 0xd1: case 0xd2: case 0xd3:
case 0xd4: case 0xd5: case 0xd6: case 0xd7:
case 0xd8: case 0xd9: case 0xda: case 0xdb:
case 0xdc: case 0xdd: case 0xde: case 0xdf:
return 0;
/* 0xc0e0 - 0xc0ef */
case 0xe0: case 0xe1: case 0xe2: case 0xe3:
case 0xe4: case 0xe5: case 0xe6: case 0xe7:
case 0xe8: case 0xe9: case 0xea: case 0xeb:
case 0xed: case 0xee: case 0xef:
return read_iwm(loc, dcycs);
case 0xec:
return iwm_read_c0ec(dcycs);
/* 0xc0f0 - 0xc0ff */
case 0xf0: case 0xf1: case 0xf2: case 0xf3:
case 0xf4: case 0xf5: case 0xf6: case 0xf7:
case 0xf8: case 0xf9: case 0xfa: case 0xfb:
case 0xfc: case 0xfd: case 0xfe: case 0xff:
return 0;
default:
printf("loc: %04x bad\n", loc);
UNIMPL_READ;
}
case 1: case 2: case 3: case 4: case 5: case 6:
/* c100 - c6ff */
mask = (1 << ((loc >> 8) & 7));
if(INTCX || ((g_c02d_int_crom & mask) == 0)) {
return(g_rom_fc_ff_ptr[0x3c000 + (loc & 0xfff)]);
}
return float_bus(dcycs);
case 7:
/* c700 */
if(INTCX || ((g_c02d_int_crom & (1 << 7)) == 0)) {
return(g_rom_fc_ff_ptr[0x3c000 + (loc & 0xfff)]);
}
tmp = g_rom_fc_ff_ptr[0x3c500 + (loc & 0xff)];
if((loc & 0xff) == 0xfb) {
tmp = tmp & 0xbf; /* clear bit 6 for ROM 03 */
}
return tmp;
case 8: case 9: case 0xa: case 0xb: case 0xc: case 0xd: case 0xe:
if(INTCX || ((g_c02d_int_crom & (1 << 3)) == 0)) {
return(g_rom_fc_ff_ptr[0x3c000 + (loc & 0xfff)]);
}
UNIMPL_READ;
case 0xf:
if(INTCX || ((g_c02d_int_crom & (1 << 3)) == 0)) {
return(g_rom_fc_ff_ptr[0x3c000 + (loc & 0xfff)]);
}
if((loc & 0xfff) == 0xfff) {
return g_rom_fc_ff_ptr[0x3cfff];
}
UNIMPL_READ;
}
halt_printf("io_read: hit end, loc: %06x\n", loc);
return 0xff;
}
void
io_write(word32 loc, int val, double *cyc_ptr)
{
double dcycs;
#if 0
double fcyc, new_fcyc;
#endif
int new_tmp;
int new_lcbank2;
int new_wrdefram;
int tmp;
int fixup;
CALC_DCYCS_FROM_CYC_PTR(dcycs, cyc_ptr, fcyc, new_fcyc);
val = val & 0xff;
switch((loc >> 8) & 0xf) {
case 0: /* 0xc000 - 0xc0ff */
//printf ("ioaddress: %x", (loc & 0xf));
switch(loc & 0xff) {
/* 0xc000 - 0xc00f */
case 0x00: /* 0xc000 */
if(g_cur_a2_stat & ALL_STAT_ST80) {
g_cur_a2_stat &= (~ALL_STAT_ST80);
fixup_st80col(dcycs);
}
return;
case 0x01: /* 0xc001 */
if((g_cur_a2_stat & ALL_STAT_ST80) == 0) {
g_cur_a2_stat |= (ALL_STAT_ST80);
fixup_st80col(dcycs);
}
return;
case 0x02: /* 0xc002 */
set_statereg(dcycs, g_c068_statereg & ~0x20);
return;
case 0x03: /* 0xc003 */
set_statereg(dcycs, g_c068_statereg | 0x20);
return;
case 0x04: /* 0xc004 */
set_statereg(dcycs, g_c068_statereg & ~0x10);
return;
case 0x05: /* 0xc005 */
set_statereg(dcycs, g_c068_statereg | 0x10);
return;
case 0x06: /* 0xc006 */
set_statereg(dcycs, g_c068_statereg & ~0x01);
return;
case 0x07: /* 0xc007 */
set_statereg(dcycs, g_c068_statereg | 0x01);
return;
case 0x08: /* 0xc008 */
set_statereg(dcycs, g_c068_statereg & ~0x80);
return;
case 0x09: /* 0xc009 */
set_statereg(dcycs, g_c068_statereg | 0x80);
return;
case 0x0a: /* 0xc00a */
tmp = 1 << 3;
if((g_c02d_int_crom & tmp) != 0) {
g_c02d_int_crom &= ~tmp;
fixup_intcx();
}
return;
case 0x0b: /* 0xc00b */
tmp = 1 << 3;
if((g_c02d_int_crom & tmp) == 0) {
g_c02d_int_crom |= tmp;
fixup_intcx();
}
return;
case 0x0c: /* 0xc00c */
if(g_cur_a2_stat & ALL_STAT_VID80) {
g_cur_a2_stat &= (~ALL_STAT_VID80);
change_display_mode(dcycs);
}
return;
case 0x0d: /* 0xc00d */
if((g_cur_a2_stat & ALL_STAT_VID80) == 0) {
g_cur_a2_stat |= (ALL_STAT_VID80);
change_display_mode(dcycs);
}
return;
case 0x0e: /* 0xc00e */
if(g_cur_a2_stat & ALL_STAT_ALTCHARSET) {
g_cur_a2_stat &= (~ALL_STAT_ALTCHARSET);
change_display_mode(dcycs);
}
return;
case 0x0f: /* 0xc00f */
if((g_cur_a2_stat & ALL_STAT_ALTCHARSET) == 0) {
g_cur_a2_stat |= (ALL_STAT_ALTCHARSET);
change_display_mode(dcycs);
}
return;
/* 0xc010 - 0xc01f */
case 0x10: case 0x11: case 0x12: case 0x13:
case 0x14: case 0x15: case 0x16: case 0x17:
case 0x18: case 0x19: case 0x1a: case 0x1b:
case 0x1c: case 0x1d: case 0x1e: case 0x1f:
adb_access_c010();
return;
/* 0xc020 - 0xc02f */
case 0x20: /* 0xc020 */
/* WRITE CASSETTE?? */
return;
case 0x21: /* 0xc021 */
new_tmp = ((val >> 7) & 1) <<
(31 - BIT_ALL_STAT_COLOR_C021);
if((g_cur_a2_stat & ALL_STAT_COLOR_C021) != new_tmp) {
g_cur_a2_stat ^= new_tmp;
change_display_mode(dcycs);
}
return;
case 0x22: /* 0xc022 */
/* change text color */
tmp = (g_cur_a2_stat >> BIT_ALL_STAT_BG_COLOR) & 0xff;
if(val != tmp) {
/* change text/bg color! */
g_cur_a2_stat &= ~(ALL_STAT_TEXT_COLOR |
ALL_STAT_BG_COLOR);
g_cur_a2_stat += (val << BIT_ALL_STAT_BG_COLOR);
change_display_mode(dcycs);
}
return;
case 0x23: /* 0xc023 */
if((val & 0x19) != 0) {
halt_printf("c023 write of %02x!!!\n", val);
}
tmp = (g_c023_val & 0x70) | (val & 0x0f);
if((tmp & 0x22) == 0x22) {
add_irq(IRQ_PENDING_C023_SCAN);
}
if(!(tmp & 2)) {
remove_irq(IRQ_PENDING_C023_SCAN);
}
if((tmp & 0x44) == 0x44) {
add_irq(IRQ_PENDING_C023_1SEC);
}
if(!(tmp & 0x4)) {
remove_irq(IRQ_PENDING_C023_1SEC);
}
if(g_irq_pending & (IRQ_PENDING_C023_SCAN |
IRQ_PENDING_C023_1SEC)) {
tmp |= 0x80;
}
g_c023_val = tmp;
return;
case 0x24: /* 0xc024 */
/* Write to mouse reg: Throw it away */
return;
case 0x26: /* 0xc026 */
adb_write_c026(val);
return;
case 0x27: /* 0xc027 */
adb_write_c027(val);
return;
case 0x29: /* 0xc029 */
g_c029_val_some = val & 0x41;
if((val & 1) == 0) {
halt_printf("c029: %02x\n", val);
}
new_tmp = val & 0xa0;
if(new_tmp != (g_cur_a2_stat & 0xa0)) {
g_cur_a2_stat = (g_cur_a2_stat & (~0xa0)) +
new_tmp;
change_display_mode(dcycs);
}
return;
case 0x2a: /* 0xc02a */
#if 0
printf("Writing c02a with %02x\n", val);
#endif
return;
case 0x2b: /* 0xc02b */
g_c02b_val = val;
if(val != 0x08 && val != 0x00) {
printf("Writing c02b with %02x\n", val);
}
return;
case 0x2d: /* 0xc02d */
if((val & 0x9) != 0) {
halt_printf("Illegal c02d write: %02x!\n", val);
}
fixup = (val != g_c02d_int_crom);
g_c02d_int_crom = val;
if(fixup) {
vid_printf("Write c02d of %02x\n", val);
fixup_intcx();
}
return;
case 0x28: /* 0xc028 */
case 0x2c: /* 0xc02c */
UNIMPL_WRITE;
case 0x25: /* 0xc025 */
/* Space Shark writes to c025--ignore */
case 0x2e: /* 0xc02e */
case 0x2f: /* 0xc02f */
/* Modulae writes to this--just ignore them */
return;
break;
/* 0xc030 - 0xc03f */
case 0x30: /* 0xc030 */
#if 0
printf("Write speaker?\n");
#endif
(void)doc_read_c030(dcycs);
return;
case 0x31: /* 0xc031 */
tmp = val ^ g_c031_disk35;
if(tmp & 0x40) {
/* apple35_sel changed, maybe speed change */
set_halt(HALT_EVENT);
}
g_c031_disk35 = val & 0xc0;
return;
case 0x32: /* 0xc032 */
tmp = g_c023_val & 0x7f;
if(((val & 0x40) == 0) && (tmp & 0x40)) {
/* clear 1 sec int */
remove_irq(IRQ_PENDING_C023_1SEC);
tmp &= 0xbf;
g_c023_val = tmp;
}
if(((val & 0x20) == 0) && (tmp & 0x20)) {
/* clear scan line int */
remove_irq(IRQ_PENDING_C023_SCAN);
g_c023_val = tmp & 0xdf;
check_for_new_scan_int(dcycs);
}
if(g_irq_pending & (IRQ_PENDING_C023_1SEC |
IRQ_PENDING_C023_SCAN)) {
g_c023_val |= 0x80;
}
if((val & 0x9f) != 0x9f) {
irq_printf("c032: wrote %02x!\n", val);
}
return;
case 0x33: /* 0xc033 = CLOCKDATA*/
g_c033_data = val;
return;
case 0x34: /* 0xc034 = CLOCKCTL */
tmp = val ^ g_c034_val;
clock_write_c034(val);
if(tmp & 0xf) {
change_border_color(dcycs, val & 0xf);
}
return;
case 0x35: /* 0xc035 */
update_shadow_reg(val);
return;
case 0x36: /* 0xc036 = CYAREG */
tmp = val ^ g_c036_val_speed;
g_c036_val_speed = (val & ~0x20); /* clr bit 5 */
if(tmp & 0x80) {
/* to recalculate times since speed changing */
set_halt(HALT_EVENT);
}
if(tmp & 0xf) {
/* slot_motor_detect changed */
set_halt(HALT_EVENT);
}
if((val & 0x60) != 0) {
/* for ROM 03, 0x40 is the power-on status */
/* and can be read/write */
if(((val & 0x60) != 0x40) ||
(g_rom_version < 3)) {
g_c036_val_speed &= (~0x60);
halt_printf("c036: %2x\n", val);
}
}
if(tmp & 0x10) { /* shadow in all banks! */
if(g_num_shadow_all_banks++ == 0) {
printf("Shadowing all banks...This "
"must be the NFC Megademo\n");
}
fixup_shadow_all_banks();
}
return;
case 0x37: /* 0xc037 */
/* just ignore, probably someone writing c036 m=0 */
return;
case 0x38: /* 0xc038 */
scc_write_reg(1, val, dcycs);
return;
case 0x39: /* 0xc039 */
scc_write_reg(0, val, dcycs);
return;
case 0x3a: /* 0xc03a */
scc_write_data(1, val, dcycs);
return;
case 0x3b: /* 0xc03b */
scc_write_data(0, val, dcycs);
return;
case 0x3c: /* 0xc03c */
/* doc ctl */
doc_write_c03c(val, dcycs);
return;
case 0x3d: /* 0xc03d */
/* doc data reg */
doc_write_c03d(val, dcycs);
return;
case 0x3e: /* 0xc03e */
g_c03ef_doc_ptr = (g_c03ef_doc_ptr & 0xff00) + val;
return;
case 0x3f: /* 0xc03f */
g_c03ef_doc_ptr = (g_c03ef_doc_ptr & 0xff) + (val << 8);
return;
/* 0xc040 - 0xc04f */
case 0x41: /* c041 */
g_c041_val = val & 0x1f;
if((val & 0xe6) != 0) {
halt_printf("write c041: %02x\n", val);
}
if (val & C041_EN_MOUSE)
{
// Enable Mega II mouse
}
if(!(val & C041_EN_VBL_INTS)) {
/* no more vbl interrupt */
remove_irq(IRQ_PENDING_C046_VBL);
}
if(!(val & C041_EN_25SEC_INTS)) {
remove_irq(IRQ_PENDING_C046_25SEC);
}
return;
case 0x46: /* c046 */
/* ignore writes to c046 */
return;
case 0x47: /* c047 */
remove_irq(IRQ_PENDING_C046_VBL |
IRQ_PENDING_C046_25SEC);
g_c046_val &= 0xe7; /* clear vblint, 1/4sec int*/
return;
case 0x48: /* c048 */
/* diversitune writes this--ignore it */
return;
case 0x42: /* c042 */
case 0x43: /* c043 */
return;
case 0x4f: /* c04f */
g_em_emubyte_cnt = 1;
return;
case 0x40: /* c040 */
case 0x44: /* c044 */
case 0x45: /* c045 */
case 0x49: /* c049 */
case 0x4a: /* c04a */
case 0x4b: /* c04b */
case 0x4c: /* c04c */
case 0x4d: /* c04d */
case 0x4e: /* c04e */
UNIMPL_WRITE;
/* 0xc050 - 0xc05f */
case 0x50: /* 0xc050 */
if(g_cur_a2_stat & ALL_STAT_TEXT) {
g_cur_a2_stat &= (~ALL_STAT_TEXT);
change_display_mode(dcycs);
}
return;
case 0x51: /* 0xc051 */
if((g_cur_a2_stat & ALL_STAT_TEXT) == 0) {
g_cur_a2_stat |= (ALL_STAT_TEXT);
change_display_mode(dcycs);
}
return;
case 0x52: /* 0xc052 */
if(g_cur_a2_stat & ALL_STAT_MIX_T_GR) {
g_cur_a2_stat &= (~ALL_STAT_MIX_T_GR);
change_display_mode(dcycs);
}
return;
case 0x53: /* 0xc053 */
if((g_cur_a2_stat & ALL_STAT_MIX_T_GR) == 0) {
g_cur_a2_stat |= (ALL_STAT_MIX_T_GR);
change_display_mode(dcycs);
}
return;
case 0x54: /* 0xc054 */
set_statereg(dcycs, g_c068_statereg & (~0x40));
return;
case 0x55: /* 0xc055 */
set_statereg(dcycs, g_c068_statereg | 0x40);
return;
case 0x56: /* 0xc056 */
if(g_cur_a2_stat & ALL_STAT_HIRES) {
g_cur_a2_stat &= (~ALL_STAT_HIRES);
fixup_hires_on();
change_display_mode(dcycs);
}
return;
case 0x57: /* 0xc057 */
if((g_cur_a2_stat & ALL_STAT_HIRES) == 0) {
g_cur_a2_stat |= (ALL_STAT_HIRES);
fixup_hires_on();
change_display_mode(dcycs);
}
return;
case 0x58: /* 0xc058 */
if(g_zipgs_unlock >= 4) {
g_zipgs_reg_c059 &= 0x4; /* last reset cold */
} else {
g_c05x_annuncs &= (~1);
}
return;
case 0x59: /* 0xc059 */
if(g_zipgs_unlock >= 4) {
g_zipgs_reg_c059 = (val & 0xf8) |
(g_zipgs_reg_c059 & 0x7);
} else {
g_c05x_annuncs |= 1;
}
return;
case 0x5a: /* 0xc05a */
g_c05x_annuncs &= (~2);
if((val & 0xf0) == 0x50) {
g_zipgs_unlock++;
} else if((val & 0xf0) == 0xa0) {
g_zipgs_unlock = 0;
} else if(g_zipgs_unlock >= 4) {
if((g_zipgs_reg_c05b & 0x10) == 0) {
/* to recalculate times */
set_halt(HALT_EVENT);
}
g_zipgs_reg_c05b |= 0x10; // disable
}
return;
case 0x5b: /* 0xc05b */
if(g_zipgs_unlock >= 4) {
if((g_zipgs_reg_c05b & 0x10) != 0) {
/* to recalculate times */
set_halt(HALT_EVENT);
}
g_zipgs_reg_c05b &= (~0x10); // enable
} else {
g_c05x_annuncs |= 2;
}
return;
case 0x5c: /* 0xc05c */
if(g_zipgs_unlock >= 4) {
g_zipgs_reg_c05c = val;
} else {
g_c05x_annuncs &= (~4);
}
return;
case 0x5d: /* 0xc05d */
if(g_zipgs_unlock >= 4) {
if(((g_zipgs_reg_c05a ^ val) >= 0x10) &&
((g_zipgs_reg_c05b & 0x10) == 0)) {
set_halt(HALT_EVENT);
}
g_zipgs_reg_c05a = val | 0xf;
} else {
g_c05x_annuncs |= 4;
}
return;
case 0x5e: /* 0xc05e */
if(g_zipgs_unlock >= 4) {
/* Zippy writes 0x80 and 0x00 here... */
} else if(g_cur_a2_stat & ALL_STAT_ANNUNC3) {
g_cur_a2_stat &= (~ALL_STAT_ANNUNC3);
change_display_mode(dcycs);
}
return;
case 0x5f: /* 0xc05f */
if(g_zipgs_unlock >= 4) {
halt_printf("Wrote ZipGS $c05f: %02x\n", val);
} else if((g_cur_a2_stat & ALL_STAT_ANNUNC3) == 0) {
g_cur_a2_stat |= (ALL_STAT_ANNUNC3);
change_display_mode(dcycs);
}
return;
/* 0xc060 - 0xc06f */
case 0x60: /* 0xc060 */
case 0x61: /* 0xc061 */
case 0x62: /* 0xc062 */
case 0x63: /* 0xc063 */
case 0x64: /* 0xc064 */
case 0x65: /* 0xc065 */
case 0x66: /* 0xc066 */
case 0x67: /* 0xc067 */
/* all the above do nothing--return */
return;
case 0x68: /* 0xc068 = STATEREG */
set_statereg(dcycs, val);
return;
case 0x69: /* 0xc069 */
/* just ignore, someone writing c068 with m=0 */
return;
#ifdef TRANSWARP
// OG writeTranswarp pseudo-register
case 0x6a: /* 0xc06a */
transwarp_low_val = val;
return ;
case 0x6b: /* 0xc06b */
val = (val<<8) + transwarp_low_val;
if ((val==2600) || (val==0x0028)) // Bug for demo ...
{
printf("Disabling Transwarp!\n");
g_zipgs_reg_c05b |= 0x10; // disable
set_halt(HALT_EVENT);
}
else if (val==8000)
{
printf("Enabling Transwarp!\n");
g_zipgs_reg_c05b &= ~0x10; // enable
set_halt(HALT_EVENT);
}
else
printf("unknown twgs speed:%d\n",val);
return;
case 0x6c: /* 0xc06c */
if (val==0)
; // set slow ?
else if (val==1)
{
// disable zip
g_zipgs_reg_c05b |= 0x10; // disable
set_halt(HALT_EVENT);
}
else if (val==2)
{
// enable zip
g_zipgs_reg_c05b &= ~0x10; // enable
set_halt(HALT_EVENT);
}
else
printf("unknown twgs index:%d\n",val);
return ;
#else
case 0x6a: /* 0xc06a */
case 0x6b: /* 0xc06b */
case 0x6c: /* 0xc06c */
#endif
case 0x6d: /* 0xc06d */
case 0x6e: /* 0xc06e */
case 0x6f: /* 0xc06f */
UNIMPL_WRITE;
/* 0xc070 - 0xc07f */
case 0x70: /* 0xc070 = Trigger paddles */
paddle_trigger(dcycs);
return;
case 0x73: /* 0xc073 = multibank ram card bank addr? */
return;
case 0x71: /* 0xc071 = another multibank ram card enable? */
case 0x7e: /* 0xc07e */
case 0x7f: /* 0xc07f */
return;
case 0x72: /* 0xc072 */
case 0x74: /* 0xc074 */
case 0x75: /* 0xc075 */
case 0x76: /* 0xc076 */
case 0x77: /* 0xc077 */
case 0x78: /* 0xc078 */
case 0x79: /* 0xc079 */
case 0x7a: /* 0xc07a */
case 0x7b: /* 0xc07b */
case 0x7c: /* 0xc07c */
case 0x7d: /* 0xc07d */
UNIMPL_WRITE;
/* 0xc080 - 0xc08f */
case 0x80: case 0x81: case 0x82: case 0x83:
case 0x84: case 0x85: case 0x86: case 0x87:
case 0x88: case 0x89: case 0x8a: case 0x8b:
case 0x8c: case 0x8d: case 0x8e: case 0x8f:
new_lcbank2 = ((loc >> 1) & 0x4) ^ 0x4;
new_wrdefram = (loc & 1);
if(new_wrdefram != g_c08x_wrdefram) {
fixup_wrdefram(new_wrdefram);
}
switch(loc & 0xf) {
case 0x1: /* 0xc081 */
case 0x2: /* 0xc082 */
case 0x5: /* 0xc085 */
case 0x6: /* 0xc086 */
case 0x9: /* 0xc089 */
case 0xa: /* 0xc08a */
case 0xd: /* 0xc08d */
case 0xe: /* 0xc08e */
/* Read rom, set lcbank2 */
set_statereg(dcycs, (g_c068_statereg & ~(0x04))|
(new_lcbank2 | 0x08));
break;
case 0x0: /* 0xc080 */
case 0x3: /* 0xc083 */
case 0x4: /* 0xc084 */
case 0x7: /* 0xc087 */
case 0x8: /* 0xc088 */
case 0xb: /* 0xc08b */
case 0xc: /* 0xc08c */
case 0xf: /* 0xc08f */
/* Read ram (clear RDROM), set lcbank2 */
set_statereg(dcycs, (g_c068_statereg & ~(0x0c))|
(new_lcbank2));
break;
}
return;
/* 0xc090 - 0xc09f */
case 0x90: case 0x91: case 0x92: case 0x93:
case 0x94: case 0x95: case 0x96: case 0x97:
case 0x98: case 0x99: case 0x9a: case 0x9b:
case 0x9c: case 0x9d: case 0x9e: case 0x9f:
if (g_parallel)
{
parallel_write((word16)loc & 0xf, (byte)val);
return;
}
else
{
UNIMPL_WRITE;
}
/* 0xc0a0 - 0xc0af */
case 0xa0: case 0xa1: case 0xa3:
case 0xa4: case 0xa5: case 0xa6: case 0xa7:
case 0xa9: case 0xaa: case 0xab:
case 0xac: case 0xad: case 0xae: case 0xaf:
UNIMPL_WRITE;
case 0xa2: /* Burger Times writes here on error */
case 0xa8:
/* Kurzweil SMP writes to 0xc0a8, ignore it */
UNIMPL_WRITE;
return;
/* 0xc0b0 - 0xc0bf */
//case 0xb0:
/* Second sight stuff--ignore it */
return;
//case 0xb1: case 0xb2: case 0xb3:
//case 0xb4: case 0xb5: case 0xb6: case 0xb7:
//case 0xb8: case 0xb9: case 0xba: case 0xbb:
//case 0xbc: case 0xbd: case 0xbe: case 0xbf:
// UNIMPL_WRITE;
#ifdef HAVE_TFE
/*Uthernet write access on slot 3*/
case 0xb0:
case 0xb1:
case 0xb2:
case 0xb3:
case 0xb4:
case 0xb5:
case 0xb6:
case 0xb7:
case 0xb8:
case 0xb9:
case 0xba:
case 0xbb:
case 0xbc:
case 0xbd:
case 0xbe:
case 0xbf:
if (tfe_enabled)
{
tfe_store((word16)loc & 0xf, (byte)val);
return;
}
else
{
UNIMPL_WRITE;
}
#endif
/* 0xc0c0 - 0xc0cf */
case 0xc0: case 0xc1: case 0xc2: case 0xc3:
case 0xc4: case 0xc5: case 0xc6: case 0xc7:
case 0xc8: case 0xc9: case 0xca: case 0xcb:
case 0xcc: case 0xcd: case 0xce: case 0xcf:
UNIMPL_WRITE;
/* 0xc0d0 - 0xc0df */
case 0xd0: case 0xd1: case 0xd2: case 0xd3:
case 0xd4: case 0xd5: case 0xd6: case 0xd7:
case 0xd8: case 0xd9: case 0xda: case 0xdb:
case 0xdc: case 0xdd: case 0xde: case 0xdf:
UNIMPL_WRITE;
/* 0xc0e0 - 0xc0ef */
case 0xe0: case 0xe1: case 0xe2: case 0xe3:
case 0xe4: case 0xe5: case 0xe6: case 0xe7:
case 0xe8: case 0xe9: case 0xea: case 0xeb:
case 0xec: case 0xed: case 0xee: case 0xef:
write_iwm(loc, val, dcycs);
return;
/* 0xc0f0 - 0xc0ff */
case 0xf0: case 0xf1: case 0xf2: case 0xf3:
case 0xf4: case 0xf5: case 0xf6: case 0xf7:
case 0xf8: case 0xf9: case 0xfa: case 0xfb:
case 0xfc: case 0xfd: case 0xfe: case 0xff:
UNIMPL_WRITE;
default:
printf("WRite loc: %x\n",loc);
exit(-300);
}
break;
case 1: case 2: case 3: case 4: case 5: case 6: case 7:
/* c1000 - c7ff */
UNIMPL_WRITE;
case 8: case 9: case 0xa: case 0xb: case 0xc: case 0xd: case 0xe:
UNIMPL_WRITE;
case 0xf:
if((loc & 0xfff) == 0xfff) {
/* cfff */
return;
}
UNIMPL_WRITE;
}
printf("Huh2? Write loc: %x\n", loc);
exit(-290);
}
#if 0
int
get_slow_mem(word32 loc, int duff_cycles)
{
int val;
loc = loc & 0x1ffff;
if((loc &0xf000) == 0xc000) {
return(io_read(loc &0xfff, duff_cycles));
}
if((loc & 0xf000) >= 0xd000) {
if((loc & 0xf000) == 0xd000) {
if(!LCBANK2) {
/* Not LCBANK2 == be 0xc000 - 0xd000 */
loc = loc - 0x1000;
}
}
}
val = g_slow_memory_ptr[loc];
halt_printf("get_slow_mem: %06x = %02x\n", loc, val);
return val;
}
int
set_slow_mem(word32 loc, int val, int duff_cycles)
{
int or_pos;
word32 or_val;
loc = loc & 0x1ffff;
if((loc & 0xf000) == 0xc000) {
return(io_write(loc & 0xfff, val, duff_cycles));
}
if((loc & 0xf000) == 0xd000) {
if(!LCBANK2) {
/* Not LCBANK2 == be 0xc000 - 0xd000 */
loc = loc - 0x1000;
}
}
if(g_slow_memory_ptr[loc] != val) {
or_pos = (loc >> SHIFT_PER_CHANGE) & 0x1f;
or_val = DEP1(1, or_pos, 0);
if((loc >> CHANGE_SHIFT) >= SLOW_MEM_CH_SIZE || loc < 0) {
printf("loc: %08x!!\n", loc);
exit(11);
}
slow_mem_changed[(loc & 0xffff) >> CHANGE_SHIFT] |= or_val;
}
/* doesn't shadow text/hires graphics properly! */
g_slow_memory_ptr[loc] = val;
return val;
}
#endif
/* IIgs vertical line counters */
/* 0x7d - 0x7f: in vbl, top of screen? */
/* 0x80 - 0xdf: not in vbl, drawing screen */
/* 0xe0 - 0xff: in vbl, bottom of screen */
/* Note: lines are then 0-0x60 effectively, for 192 lines */
/* vertical blanking engages on line 192, even if in super hires mode */
/* (Last 8 lines in SHR are drawn with vbl_active set */
word32
get_lines_since_vbl(double dcycs)
{
double dcycs_since_last_vbl;
double dlines_since_vbl;
double dcyc_line_start;
word32 lines_since_vbl;
int offset;
dcycs_since_last_vbl = dcycs - g_last_vbl_dcycs;
dlines_since_vbl = dcycs_since_last_vbl * (1.0 / 65.0);
lines_since_vbl = (int)dlines_since_vbl;
dcyc_line_start = (double)lines_since_vbl * 65.0;
offset = ((int)(dcycs_since_last_vbl - dcyc_line_start)) & 0xff;
lines_since_vbl = (lines_since_vbl << 8) + offset;
if(lines_since_vbl < 0x10680) {
return lines_since_vbl;
} else {
halt_printf("lines_since_vbl: %08x!\n", lines_since_vbl);
printf("dc_s_l_v: %f, dcycs: %f, last_vbl_cycs: %f\n",
dcycs_since_last_vbl, dcycs, g_last_vbl_dcycs);
show_dtime_array();
show_all_events();
/* U_STACK_TRACE(); */
}
return lines_since_vbl;
}
int
in_vblank(double dcycs)
{
int lines_since_vbl;
lines_since_vbl = get_lines_since_vbl(dcycs);
if(lines_since_vbl >= 0xc000) {
return 1;
}
return 0;
}
/* horizontal video counter goes from 0x00,0x40 - 0x7f, then 0x80,0xc0-0xff */
/* over 2*65 cycles. The last visible screen pos is 0x7f and 0xff */
/* This matches GSport starting line 0 at the border for line -1 */
int
read_vid_counters(int loc, double dcycs)
{
word32 mask;
int lines_since_vbl;
loc = loc & 0xf;
lines_since_vbl = get_lines_since_vbl(dcycs);
lines_since_vbl += 0x10000;
if(lines_since_vbl >= 0x20000) {
lines_since_vbl = lines_since_vbl - 0x20000 + 0xfa00;
}
if(lines_since_vbl > 0x1ffff) {
halt_printf("lines_since_vbl: %04x, dcycs: %f, last_vbl: %f\n",
lines_since_vbl, dcycs, g_last_vbl_dcycs);
}
if(loc == 0xe) {
/* Vertical count */
return (lines_since_vbl >> 9) & 0xff;
}
mask = (lines_since_vbl >> 1) & 0x80;
lines_since_vbl = (lines_since_vbl & 0xff);
if(lines_since_vbl >= 0x01) {
lines_since_vbl = (lines_since_vbl + 0x3f) & 0x7f;
}
return (mask | (lines_since_vbl & 0xff));
}
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