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frodo-wii/Src/SAM.cpp
simon.kagstrom 2a6bece89d Imported orig code
2008-12-31 16:16:24 +00:00

2176 lines
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/*
* SAM.h - Simple Assembler and Monitor With Integrated System Explorer
*
* Frodo (C) 1994-1997,2002 Christian Bauer
*/
#include "sysdeps.h"
#include "SAM.h"
#include "C64.h"
#include "CPUC64.h"
#include "CPU1541.h"
#include "VIC.h"
#include "SID.h"
#include "CIA.h"
// Pointers to chips
static MOS6510 *TheCPU;
static MOS6502_1541 *TheCPU1541;
static MOS6569 *TheVIC;
static MOS6581 *TheSID;
static MOS6526_1 *TheCIA1;
static MOS6526_2 *TheCIA2;
// 6510/6502 registers
static MOS6510State R64;
static MOS6502State R1541;
static bool access_1541; // false: accessing C64, true: accessing 1541
// Access to 6510/6502 address space
static inline uint8 SAMReadByte(uint16 adr)
{
if (access_1541)
return TheCPU1541->ExtReadByte(adr);
else
return TheCPU->ExtReadByte(adr);
}
static inline void SAMWriteByte(uint16 adr, uint8 byte)
{
if (access_1541)
TheCPU1541->ExtWriteByte(adr, byte);
else
TheCPU->ExtWriteByte(adr, byte);
}
// Streams for input, output and error messages
static FILE *fin, *fout, *ferr;
// Input line
#define INPUT_LENGTH 80
static char input[INPUT_LENGTH];
static char *in_ptr;
static uint16 address, end_address;
// Input tokens
enum Token {
T_NULL, // Invalid token
T_END, // End of line
T_NUMBER, // Hexadecimal number
T_STRING, // String enclosed in ""
T_LPAREN, // '('
T_RPAREN, // ')'
T_ADD, // '+'
T_SUB, // '-'
T_MUL, // '*'
T_DIV, // '/'
T_COMMA, // ','
T_IMMED, // '#'
T_X, // 'x'
T_Y, // 'y'
T_PC, // 'pc'
T_SP, // 'sp'
T_A, // 'a' (get_reg_token() only)
T_DR, // 'dr' (get_reg_token() only)
T_PR // 'pr' (get_reg_token() only)
};
static enum Token the_token; // Last token read
static uint16 the_number; // Contains the number if the_token==T_NUMBER
static char the_string[INPUT_LENGTH]; // Contains the string if the_token==T_STRING
// Addressing modes
enum {
A_IMPL,
A_ACCU, // A
A_IMM, // #zz
A_REL, // Branches
A_ZERO, // zz
A_ZEROX, // zz,x
A_ZEROY, // zz,y
A_ABS, // zzzz
A_ABSX, // zzzz,x
A_ABSY, // zzzz,y
A_IND, // (zzzz)
A_INDX, // (zz,x)
A_INDY // (zz),y
};
// Mnemonics
enum {
M_ADC, M_AND, M_ASL, M_BCC, M_BCS, M_BEQ, M_BIT, M_BMI, M_BNE, M_BPL,
M_BRK, M_BVC, M_BVS, M_CLC, M_CLD, M_CLI, M_CLV, M_CMP, M_CPX, M_CPY,
M_DEC, M_DEX, M_DEY, M_EOR, M_INC, M_INX, M_INY, M_JMP, M_JSR, M_LDA,
M_LDX, M_LDY, M_LSR, M_NOP, M_ORA, M_PHA, M_PHP, M_PLA, M_PLP, M_ROL,
M_ROR, M_RTI, M_RTS, M_SBC, M_SEC, M_SED, M_SEI, M_STA, M_STX, M_STY,
M_TAX, M_TAY, M_TSX, M_TXA, M_TXS, M_TYA,
M_ILLEGAL, // Undocumented opcodes start here
M_IANC, M_IANE, M_IARR, M_IASR, M_IDCP, M_IISB, M_IJAM, M_INOP, M_ILAS,
M_ILAX, M_ILXA, M_IRLA, M_IRRA, M_ISAX, M_ISBC, M_ISBX, M_ISHA, M_ISHS,
M_ISHX, M_ISHY, M_ISLO, M_ISRE,
M_MAXIMUM // Highest element
};
// Mnemonic for each opcode
static const char mnemonic[256] = {
M_BRK , M_ORA , M_IJAM, M_ISLO, M_INOP, M_ORA, M_ASL , M_ISLO, // 00
M_PHP , M_ORA , M_ASL , M_IANC, M_INOP, M_ORA, M_ASL , M_ISLO,
M_BPL , M_ORA , M_IJAM, M_ISLO, M_INOP, M_ORA, M_ASL , M_ISLO, // 10
M_CLC , M_ORA , M_INOP, M_ISLO, M_INOP, M_ORA, M_ASL , M_ISLO,
M_JSR , M_AND , M_IJAM, M_IRLA, M_BIT , M_AND, M_ROL , M_IRLA, // 20
M_PLP , M_AND , M_ROL , M_IANC, M_BIT , M_AND, M_ROL , M_IRLA,
M_BMI , M_AND , M_IJAM, M_IRLA, M_INOP, M_AND, M_ROL , M_IRLA, // 30
M_SEC , M_AND , M_INOP, M_IRLA, M_INOP, M_AND, M_ROL , M_IRLA,
M_RTI , M_EOR , M_IJAM, M_ISRE, M_INOP, M_EOR, M_LSR , M_ISRE, // 40
M_PHA , M_EOR , M_LSR , M_IASR, M_JMP , M_EOR, M_LSR , M_ISRE,
M_BVC , M_EOR , M_IJAM, M_ISRE, M_INOP, M_EOR, M_LSR , M_ISRE, // 50
M_CLI , M_EOR , M_INOP, M_ISRE, M_INOP, M_EOR, M_LSR , M_ISRE,
M_RTS , M_ADC , M_IJAM, M_IRRA, M_INOP, M_ADC, M_ROR , M_IRRA, // 60
M_PLA , M_ADC , M_ROR , M_IARR, M_JMP , M_ADC, M_ROR , M_IRRA,
M_BVS , M_ADC , M_IJAM, M_IRRA, M_INOP, M_ADC, M_ROR , M_IRRA, // 70
M_SEI , M_ADC , M_INOP, M_IRRA, M_INOP, M_ADC, M_ROR , M_IRRA,
M_INOP, M_STA , M_INOP, M_ISAX, M_STY , M_STA, M_STX , M_ISAX, // 80
M_DEY , M_INOP, M_TXA , M_IANE, M_STY , M_STA, M_STX , M_ISAX,
M_BCC , M_STA , M_IJAM, M_ISHA, M_STY , M_STA, M_STX , M_ISAX, // 90
M_TYA , M_STA , M_TXS , M_ISHS, M_ISHY, M_STA, M_ISHX, M_ISHA,
M_LDY , M_LDA , M_LDX , M_ILAX, M_LDY , M_LDA, M_LDX , M_ILAX, // a0
M_TAY , M_LDA , M_TAX , M_ILXA, M_LDY , M_LDA, M_LDX , M_ILAX,
M_BCS , M_LDA , M_IJAM, M_ILAX, M_LDY , M_LDA, M_LDX , M_ILAX, // b0
M_CLV , M_LDA , M_TSX , M_ILAS, M_LDY , M_LDA, M_LDX , M_ILAX,
M_CPY , M_CMP , M_INOP, M_IDCP, M_CPY , M_CMP, M_DEC , M_IDCP, // c0
M_INY , M_CMP , M_DEX , M_ISBX, M_CPY , M_CMP, M_DEC , M_IDCP,
M_BNE , M_CMP , M_IJAM, M_IDCP, M_INOP, M_CMP, M_DEC , M_IDCP, // d0
M_CLD , M_CMP , M_INOP, M_IDCP, M_INOP, M_CMP, M_DEC , M_IDCP,
M_CPX , M_SBC , M_INOP, M_IISB, M_CPX , M_SBC, M_INC , M_IISB, // e0
M_INX , M_SBC , M_NOP , M_ISBC, M_CPX , M_SBC, M_INC , M_IISB,
M_BEQ , M_SBC , M_IJAM, M_IISB, M_INOP, M_SBC, M_INC , M_IISB, // f0
M_SED , M_SBC , M_INOP, M_IISB, M_INOP, M_SBC, M_INC , M_IISB
};
// Addressing mode for each opcode
static const char adr_mode[256] = {
A_IMPL, A_INDX, A_IMPL, A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // 00
A_IMPL, A_IMM , A_ACCU, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROX, A_ZEROX, // 10
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSX , A_ABSX,
A_ABS , A_INDX, A_IMPL, A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // 20
A_IMPL, A_IMM , A_ACCU, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROX, A_ZEROX, // 30
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSX , A_ABSX,
A_IMPL, A_INDX, A_IMPL, A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // 40
A_IMPL, A_IMM , A_ACCU, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROX, A_ZEROX, // 50
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSX , A_ABSX,
A_IMPL, A_INDX, A_IMPL, A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // 60
A_IMPL, A_IMM , A_ACCU, A_IMM , A_IND , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROX, A_ZEROX, // 70
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSX , A_ABSX,
A_IMM , A_INDX, A_IMM , A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // 80
A_IMPL, A_IMM , A_IMPL, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROY, A_ZEROY, // 90
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSY , A_ABSY,
A_IMM , A_INDX, A_IMM , A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // a0
A_IMPL, A_IMM , A_IMPL, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROY, A_ZEROY, // b0
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSY , A_ABSY,
A_IMM , A_INDX, A_IMM , A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // c0
A_IMPL, A_IMM , A_IMPL, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROX, A_ZEROX, // d0
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSX , A_ABSX,
A_IMM , A_INDX, A_IMM , A_INDX, A_ZERO , A_ZERO , A_ZERO , A_ZERO, // e0
A_IMPL, A_IMM , A_IMPL, A_IMM , A_ABS , A_ABS , A_ABS , A_ABS,
A_REL , A_INDY, A_IMPL, A_INDY, A_ZEROX, A_ZEROX, A_ZEROX, A_ZEROX, // f0
A_IMPL, A_ABSY, A_IMPL, A_ABSY, A_ABSX , A_ABSX , A_ABSX , A_ABSX
};
// Chars for each mnemonic
static const char mnem_1[] = "aaabbbbbbbbbbcccccccdddeiiijjllllnopppprrrrssssssstttttt?aaaadijnlllrrsssssssss";
static const char mnem_2[] = "dnscceimnprvvllllmppeeeonnnmsdddsorhhlloottbeeetttaasxxy?nnrscsaoaaxlrabbhhhhlr";
static const char mnem_3[] = "cdlcsqtielkcscdivpxycxyrcxypraxyrpaapaplrisccdiaxyxyxasa?cerrpbmpsxaaaxcxasxyoe";
// Instruction length for each addressing mode
static const char adr_length[] = {1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 2, 2};
// Prototypes
static void error(char *s);
static void handle_abort(...);
static void init_abort(void);
static void exit_abort(void);
static bool aborted(void);
static void read_line(void); // Scanner
static char get_char(void);
static void put_back(char c);
static enum Token get_token(void);
static enum Token get_reg_token(void);
static uint16 get_number(void);
static enum Token get_string(char *str);
static bool expression(uint16 *number); // Parser
static bool term(uint16 *number);
static bool factor(uint16 *number);
static bool address_args(void);
static bool range_args(int def_range);
static bool instr_args(uint16 *number, char *mode);
static void help(void); // Routines for commands
static void registers(void);
static void display_registers(void);
static void memory_dump(void);
static void ascii_dump(void);
static char conv_from_64(char c);
static void screen_dump(void);
static char conv_from_scode(char c);
static void binary_dump(void);
static void sprite_dump(void);
static void byte_to_bin(uint8 byte, char *str);
static void disassemble(void);
static int disass_line(uint16 adr, uint8 op, uint8 lo, uint8 hi);
static void assemble(void);
static char find_mnemonic(char op1, char op2, char op3);
static bool find_opcode(char mnem, char mode, uint8 *opcode);
static void mem_config(void);
static void fill(void);
static void compare(void);
static void transfer(void);
static void modify(void);
static void print_expr(void);
static void redir_output(void);
static void int_vectors(void);
static void view_state(void);
static void view_cia_state(void);
static void dump_cia_ints(uint8 i);
static void view_sid_state(void);
static void dump_sid_waveform(uint8 wave);
static void view_vic_state(void);
static void dump_spr_flags(uint8 f);
static void dump_vic_ints(uint8 i);
static void view_1541_state(void);
static void dump_via_ints(uint8 i);
static void load_data(void);
static void save_data(void);
/*
* Open and handle SAM
*/
void SAM(C64 *the_c64)
{
bool done = false;
char c;
TheCPU = the_c64->TheCPU;
TheCPU1541 = the_c64->TheCPU1541;
TheVIC = the_c64->TheVIC;
TheSID = the_c64->TheSID;
TheCIA1 = the_c64->TheCIA1;
TheCIA2 = the_c64->TheCIA2;
// Get CPU registers and current memory configuration
TheCPU->GetState(&R64);
TheCPU->ExtConfig = (~R64.ddr | R64.pr) & 7;
TheCPU1541->GetState(&R1541);
#ifdef __riscos__
Wimp_CommandWindow((int)"SAM");
#endif
#ifdef AMIGA
if (!(fin = fout = ferr = fopen("CON:0/0/640/480/SAM", "w+")))
return;
#else
fin = stdin;
fout = stdout;
ferr = stdout;
#endif
access_1541 = false;
address = R64.pc;
fprintf(ferr, "\n *** SAM - Simple Assembler and Monitor ***\n *** Press 'h' for help ***\n\n");
init_abort();
display_registers();
while (!done) {
if (access_1541)
fprintf(ferr, "1541> ");
else
fprintf(ferr, "C64> ");
fflush(ferr);
read_line();
while ((c = get_char()) == ' ') ;
switch (c) {
case 'a': // Assemble
get_token();
assemble();
break;
case 'b': // Binary dump
get_token();
binary_dump();
break;
case 'c': // Compare
get_token();
compare();
break;
case 'd': // Disassemble
get_token();
disassemble();
break;
case 'e': // Interrupt vectors
int_vectors();
break;
case 'f': // Fill
get_token();
fill();
break;
case 'h': // Help
help();
break;
case 'i': // ASCII dump
get_token();
ascii_dump();
break;
case 'k': // Memory configuration
get_token();
mem_config();
break;
case 'l': // Load data
get_token();
load_data();
break;
case 'm': // Memory dump
get_token();
memory_dump();
break;
case 'n': // Screen code dump
get_token();
screen_dump();
break;
case 'o': // Redirect output
get_token();
redir_output();
break;
case 'p': // Sprite dump
get_token();
sprite_dump();
break;
case 'r': // Registers
get_reg_token();
registers();
break;
case 's': // Save data
get_token();
save_data();
break;
case 't': // Transfer
get_token();
transfer();
break;
case 'v': // View machine state
view_state();
break;
case 'x': // Exit
done = true;
break;
case ':': // Change memory
get_token();
modify();
break;
case '1': // Switch to 1541 mode
access_1541 = true;
break;
case '6': // Switch to C64 mode
access_1541 = false;
break;
case '?': // Compute expression
get_token();
print_expr();
break;
case '\n': // Blank line
break;
default: // Unknown command
error("Unknown command");
break;
}
}
exit_abort();
#ifdef AMIGA
fclose(fin);
#endif
if (fout != ferr)
fclose(fout);
#ifdef __riscos__
Wimp_CommandWindow(-1);
#endif
// Set CPU registers
TheCPU->SetState(&R64);
TheCPU1541->SetState(&R1541);
}
/*
* Print error message
*/
static void error(char *s)
{
fprintf(ferr, "*** %s\n", s);
}
/*
* CTRL-C pressed?
*/
static bool WasAborted;
#ifdef HAVE_SIGACTION
struct sigaction my_sa;
#endif
static void handle_abort(...)
{
WasAborted = true;
#if !defined(HAVE_SIGACTION) && defined(HAVE_SIGNAL)
#ifdef __riscos__
signal(SIGINT, (Handler*) handle_abort);
#else
signal(SIGINT, (sighandler_t) handle_abort);
#endif
#endif
}
static void init_abort(void)
{
WasAborted = false;
#if defined(HAVE_SIGACTION)
my_sa.sa_handler = (void (*)(int))handle_abort;
my_sa.sa_flags = 0;
sigemptyset(&my_sa.sa_mask);
sigaction(SIGINT, &my_sa, NULL);
#elif defined(HAVE_SIGNAL)
#ifdef __riscos__
signal(SIGINT, (Handler*) handle_abort);
#else
signal(SIGINT, (sighandler_t) handle_abort);
#endif
#endif
}
static void exit_abort(void)
{
#if defined(HAVE_SIGACTION)
my_sa.sa_handler = SIG_DFL;
sigaction(SIGINT, &my_sa, NULL);
#elif defined(HAVE_SIGNAL)
signal(SIGINT, SIG_DFL);
#endif
}
static bool aborted(void)
{
bool ret = WasAborted;
WasAborted = false;
return ret;
}
/*
* Read a line from the keyboard
*/
static void read_line(void)
{
#ifdef __riscos__
OS_ReadLine(in_ptr = input, INPUT_LENGTH, 0, 255, 0);
#else
fgets(in_ptr = input, INPUT_LENGTH, fin);
#endif
}
/*
* Read a character from the input line
*/
static char get_char(void)
{
return *in_ptr++;
}
/*
* Stuff back a character into the input line
*/
static void put_back(char c)
{
*(--in_ptr) = c;
}
/*
* Scanner: Get a token from the input line
*/
static enum Token get_token(void)
{
char c;
// Skip spaces
while ((c = get_char()) == ' ') ;
switch (c) {
case '\n':
return the_token = T_END;
case '(':
return the_token = T_LPAREN;
case ')':
return the_token = T_RPAREN;
case '+':
return the_token = T_ADD;
case '-':
return the_token = T_SUB;
case '*':
return the_token = T_MUL;
case '/':
return the_token = T_DIV;
case ',':
return the_token = T_COMMA;
case '#':
return the_token = T_IMMED;
case 'x':
return the_token = T_X;
case 'y':
return the_token = T_Y;
case 'p':
if (get_char() == 'c')
return the_token = T_PC;
else {
error("Unrecognized token");
return the_token = T_NULL;
}
case 's':
if (get_char() == 'p')
return the_token = T_SP;
else {
error("Unrecognized token");
return the_token = T_NULL;
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
put_back(c);
the_number = get_number();
return the_token = T_NUMBER;
case '"':
return the_token = get_string(the_string);
default:
error("Unrecognized token");
return the_token = T_NULL;
}
}
static enum Token get_reg_token(void)
{
char c;
// Skip spaces
while ((c = get_char()) == ' ') ;
switch (c) {
case '\n':
return the_token = T_END;
case 'a':
return the_token = T_A;
case 'd':
if (get_char() == 'r')
return the_token = T_DR;
else {
error("Unrecognized token");
return the_token = T_NULL;
}
case 'p':
if ((c = get_char()) == 'c')
return the_token = T_PC;
else if (c == 'r')
return the_token = T_PR;
else {
error("Unrecognized token");
return the_token = T_NULL;
}
case 's':
if (get_char() == 'p')
return the_token = T_SP;
else {
error("Unrecognized token");
return the_token = T_NULL;
}
case 'x':
return the_token = T_X;
case 'y':
return the_token = T_Y;
default:
error("Unrecognized token");
return the_token = T_NULL;
}
}
static uint16 get_number(void)
{
char c;
uint16 i = 0;
while (((c = get_char()) >= '0') && (c <= '9') || (c >= 'a') && (c <= 'f'))
if (c < 'a')
i = (i << 4) + (c - '0');
else
i = (i << 4) + (c - 'a' + 10);
put_back(c);
return i;
}
static enum Token get_string(char *str)
{
char c;
while ((c = get_char()) != '\n') {
if (c == '"') {
*str = 0;
return T_STRING;
}
*str++ = c;
}
error("Unterminated string");
return T_NULL;
}
/*
* expression = term {(ADD | SUB) term}
* true: OK, false: Error
*/
static bool expression(uint16 *number)
{
uint16 accu, trm;
if (!term(&accu))
return false;
for (;;)
switch (the_token) {
case T_ADD:
get_token();
if (!term(&trm))
return false;
accu += trm;
break;
case T_SUB:
get_token();
if (!term(&trm))
return false;
accu -= trm;
break;
default:
*number = accu;
return true;
}
}
/*
* term = factor {(MUL | DIV) factor}
* true: OK, false: Error
*/
static bool term(uint16 *number)
{
uint16 accu, fact;
if (!factor(&accu))
return false;
for (;;)
switch (the_token) {
case T_MUL:
get_token();
if (!factor(&fact))
return false;
accu *= fact;
break;
case T_DIV:
get_token();
if (!factor(&fact))
return false;
if (fact == 0) {
error("Division by 0");
return false;
}
accu /= fact;
break;
default:
*number = accu;
return true;
}
}
/*
* factor = NUMBER | PC | SP | LPAREN expression RPAREN
* true: OK, false: Error
*/
static bool factor(uint16 *number)
{
switch (the_token) {
case T_NUMBER:
*number = the_number;
get_token();
return true;
case T_PC:
get_token();
*number = access_1541 ? R1541.pc : R64.pc;
return true;
case T_SP:
get_token();
*number = access_1541 ? R1541.sp : R64.sp;
return true;
case T_LPAREN:
get_token();
if (expression(number))
if (the_token == T_RPAREN) {
get_token();
return true;
} else {
error("Missing ')'");
return false;
}
else {
error("Error in expression");
return false;
}
case T_END:
error("Required argument missing");
return false;
default:
error("'pc', 'sp', '(' or number expected");
return false;
}
}
/*
* address_args = [expression] END
*
* Read start to "address"
*
* true: OK, false: Error
*/
static bool address_args(void)
{
if (the_token == T_END)
return true;
else {
if (!expression(&address))
return false;
return the_token == T_END;
}
}
/*
* range_args = [expression] [[COMMA] expression] END
*
* Read start address to "address", end address to "end_address"
*
* true: OK, false: Error
*/
static bool range_args(int def_range)
{
end_address = address + def_range;
if (the_token == T_END)
return true;
else {
if (!expression(&address))
return false;
end_address = address + def_range;
if (the_token == T_END)
return true;
else {
if (the_token == T_COMMA) get_token();
if (!expression(&end_address))
return false;
return the_token == T_END;
}
}
}
/*
* instr_args = END
* | IMMED NUMBER END
* | NUMBER [COMMA (X | Y)] END
* | LPAREN NUMBER (RPAREN [COMMA Y] | COMMA X RPAREN) END
*
* Read arguments of a 6510 instruction, determine address and addressing mode
*
* true: OK, false: Error
*/
static bool instr_args(uint16 *number, char *mode)
{
switch (the_token) {
case T_END:
*mode = A_IMPL;
return true;
case T_IMMED:
get_token();
if (the_token == T_NUMBER) {
*number = the_number;
*mode = A_IMM;
get_token();
return the_token == T_END;
} else {
error("Number expected");
return false;
}
case T_NUMBER:
*number = the_number;
get_token();
switch (the_token) {
case T_END:
if (*number < 0x100)
*mode = A_ZERO;
else
*mode = A_ABS;
return true;
case T_COMMA:
get_token();
switch (the_token) {
case T_X:
get_token();
if (*number < 0x100)
*mode = A_ZEROX;
else
*mode = A_ABSX;
return the_token == T_END;
case T_Y:
get_token();
if (*number < 0x100)
*mode = A_ZEROY;
else
*mode = A_ABSY;
return the_token == T_END;
default:
error("Illegal index register");
return false;
}
default:
return false;
}
case T_LPAREN:
get_token();
if (the_token == T_NUMBER) {
*number = the_number;
get_token();
switch (the_token) {
case T_RPAREN:
get_token();
switch (the_token) {
case T_END:
*mode = A_IND;
return true;
case T_COMMA:
get_token();
if (the_token == T_Y) {
*mode = A_INDY;
get_token();
return the_token == T_END;
} else {
error("Only 'y' index register allowed");
return false;
}
default:
error("Illegal characters after ')'");
return false;
}
case T_COMMA:
get_token();
if (the_token == T_X) {
get_token();
if (the_token == T_RPAREN) {
*mode = A_INDX;
get_token();
return the_token == T_END;
} else {
error("')' expected");
return false;
}
} else {
error("Only 'x' index register allowed");
return false;
}
default:
error("')' or ',' expected");
return false;
}
} else {
error("Number expected");
return false;
}
default:
error("'(', '#' or number expected");
return false;
}
}
/*
* Display help
* h
*/
static void help(void)
{
fprintf(fout, "a [start] Assemble\n"
"b [start] [end] Binary dump\n"
"c start end dest Compare memory\n"
"d [start] [end] Disassemble\n"
"e Show interrupt vectors\n"
"f start end byte Fill memory\n"
"i [start] [end] ASCII/PETSCII dump\n"
"k [config] Show/set C64 memory configuration\n"
"l start \"file\" Load data\n"
"m [start] [end] Memory dump\n"
"n [start] [end] Screen code dump\n"
"o [\"file\"] Redirect output\n"
"p [start] [end] Sprite dump\n"
"r [reg value] Show/set CPU registers\n"
"s start end \"file\" Save data\n"
"t start end dest Transfer memory\n"
"vc1 View CIA 1 state\n"
"vc2 View CIA 2 state\n"
"vf View 1541 state\n"
"vs View SID state\n"
"vv View VIC state\n"
"x Return to Frodo\n"
": addr {byte} Modify memory\n"
"1541 Switch to 1541\n"
"64 Switch to C64\n"
"? expression Calculate expression\n");
}
/*
* Display/change 6510 registers
* r [reg value]
*/
static void registers(void)
{
enum Token the_reg;
uint16 value;
if (the_token != T_END)
switch (the_reg = the_token) {
case T_A:
case T_X:
case T_Y:
case T_PC:
case T_SP:
case T_DR:
case T_PR:
get_token();
if (!expression(&value))
return;
switch (the_reg) {
case T_A:
if (access_1541)
R1541.a = value;
else
R64.a = value;
break;
case T_X:
if (access_1541)
R1541.x = value;
else
R64.x = value;
break;
case T_Y:
if (access_1541)
R1541.y = value;
else
R64.y = value;
break;
case T_PC:
if (access_1541)
R1541.pc = value;
else
R64.pc = value;
break;
case T_SP:
if (access_1541)
R1541.sp = (value & 0xff) | 0x0100;
else
R64.sp = (value & 0xff) | 0x0100;
break;
case T_DR:
if (!access_1541)
R64.ddr = value;
break;
case T_PR:
if (!access_1541)
R64.pr = value;
break;
default:
break;
}
break;
default:
return;
}
display_registers();
}
static void display_registers(void)
{
if (access_1541) {
fprintf(fout, " PC A X Y SP NVDIZC Instruction\n");
fprintf(fout, "%04lx %02lx %02lx %02lx %04lx %c%c%c%c%c%c ",
R1541.pc, R1541.a, R1541.x, R1541.y, R1541.sp,
R1541.p & 0x80 ? '1' : '0', R1541.p & 0x40 ? '1' : '0', R1541.p & 0x08 ? '1' : '0',
R1541.p & 0x04 ? '1' : '0', R1541.p & 0x02 ? '1' : '0', R1541.p & 0x01 ? '1' : '0');
disass_line(R1541.pc, SAMReadByte(R1541.pc), SAMReadByte(R1541.pc+1), SAMReadByte(R1541.pc+2));
} else {
fprintf(fout, " PC A X Y SP DR PR NVDIZC Instruction\n");
fprintf(fout, "%04lx %02lx %02lx %02lx %04lx %02lx %02lx %c%c%c%c%c%c ",
R64.pc, R64.a, R64.x, R64.y, R64.sp, R64.ddr, R64.pr,
R64.p & 0x80 ? '1' : '0', R64.p & 0x40 ? '1' : '0', R64.p & 0x08 ? '1' : '0',
R64.p & 0x04 ? '1' : '0', R64.p & 0x02 ? '1' : '0', R64.p & 0x01 ? '1' : '0');
disass_line(R64.pc, SAMReadByte(R64.pc), SAMReadByte(R64.pc+1), SAMReadByte(R64.pc+2));
}
}
/*
* Memory dump
* m [start] [end]
*/
#define MEMDUMP_BPL 16 // Bytes per line
static void memory_dump(void)
{
bool done = false;
short i;
uint8 mem[MEMDUMP_BPL + 2];
uint8 byte;
mem[MEMDUMP_BPL] = 0;
if (!range_args(16 * MEMDUMP_BPL - 1)) // 16 lines unless end address specified
return;
do {
fprintf(fout, "%04lx:", address);
for (i=0; i<MEMDUMP_BPL; i++, address++) {
if (address == end_address) done = true;
fprintf(fout, " %02lx", byte = SAMReadByte(address));
if ((byte >= ' ') && (byte <= '~'))
mem[i] = conv_from_64(byte);
else
mem[i] = '.';
}
fprintf(fout, " '%s'\n", mem);
} while (!done && !aborted());
}
/*
* ASCII dump
* i [start] [end]
*/
#define ASCIIDUMP_BPL 64 // Bytes per line
static void ascii_dump(void)
{
bool done = false;
short i;
uint8 mem[ASCIIDUMP_BPL + 2];
uint8 byte;
mem[ASCIIDUMP_BPL] = 0;
if (!range_args(16 * ASCIIDUMP_BPL - 1)) // 16 lines unless end address specified
return;
do {
fprintf(fout, "%04lx:", address);
for (i=0; i<ASCIIDUMP_BPL; i++, address++) {
if (address == end_address) done = true;
byte = SAMReadByte(address);
if ((byte >= ' ') && (byte <= '~'))
mem[i] = conv_from_64(byte);
else
mem[i] = '.';
}
fprintf(fout, " '%s'\n", mem);
} while (!done && !aborted());
}
/*
* Convert PETSCII->ASCII
*/
static char conv_from_64(char c)
{
if ((c >= 'A') && (c <= 'Z') || (c >= 'a') && (c <= 'z'))
return c ^ 0x20;
else
return c;
}
/*
* Screen code dump
* n [start] [end]
*/
#define SCRDUMP_BPL 64 // Bytes per line
static void screen_dump(void)
{
bool done = false;
short i;
uint8 mem[SCRDUMP_BPL + 2];
uint8 byte;
mem[SCRDUMP_BPL] = 0;
if (!range_args(16 * SCRDUMP_BPL - 1)) // 16 Zeilen unless end address specified
return;
do {
fprintf(fout, "%04lx:", address);
for (i=0; i<SCRDUMP_BPL; i++, address++) {
if (address == end_address) done = true;
byte = SAMReadByte(address);
if (byte < 90)
mem[i] = conv_from_scode(byte);
else
mem[i] = '.';
}
fprintf(fout, " '%s'\n", mem);
} while (!done && !aborted());
}
/*
* Convert screen code->ASCII
*/
static char conv_from_scode(char c)
{
c &= 0x7f;
if (c <= 31)
return c + 64;
else
if (c >= 64)
return c + 32;
else
return c;
}
/*
* Binary dump
* b [start] [end]
*/
static void binary_dump(void)
{
bool done = false;
char bin[10];
bin[8] = 0;
if (!range_args(7)) // 8 lines unless end address specified
return;
do {
if (address == end_address) done = true;
byte_to_bin(SAMReadByte(address), bin);
fprintf(fout, "%04lx: %s\n", address++, bin);
} while (!done && !aborted());
}
/*
* Sprite data dump
* p [start] [end]
*/
static void sprite_dump(void)
{
bool done = false;
short i;
char bin[10];
bin[8] = 0;
if (!range_args(21 * 3 - 1)) // 21 lines unless end address specified
return;
do {
fprintf(fout, "%04lx: ", address);
for (i=0; i<3; i++, address++) {
if (address == end_address) done = true;
byte_to_bin(SAMReadByte(address), bin);
fprintf(fout, "%s", bin);
}
fputc('\n', fout);
} while (!done && !aborted());
}
/*
* Convert byte to binary representation
*/
static void byte_to_bin(uint8 byte, char *str)
{
short i;
for (i=0; i<8; i++, byte<<=1)
if (byte & 0x80)
str[i] = '#';
else
str[i] = '.';
}
/*
* Disassemble
* d [start] [end]
*/
static void disassemble(void)
{
bool done = false;
short i;
uint8 op[3];
uint16 adr;
if (!range_args(31)) // 32 bytes unless end address specified
return;
do {
fprintf(fout, "%04lx:", adr = address);
for (i=0; i<3; i++, adr++) {
if (adr == end_address) done = true;
op[i] = SAMReadByte(adr);
}
address += disass_line(address, op[0], op[1], op[2]);
} while (!done && !aborted());
}
/*
* Disassemble one instruction, return length
*/
static int disass_line(uint16 adr, uint8 op, uint8 lo, uint8 hi)
{
char mode = adr_mode[op], mnem = mnemonic[op];
// Display instruction bytes in hex
switch (adr_length[mode]) {
case 1:
fprintf(fout, " %02lx ", op);
break;
case 2:
fprintf(fout, " %02lx %02lx ", op, lo);
break;
case 3:
fprintf(fout, " %02lx %02lx %02lx ", op, lo, hi);
break;
}
// Tag undocumented opcodes with an asterisk
if (mnem > M_ILLEGAL)
fputc('*', fout);
else
fputc(' ', fout);
// Print mnemonic
fprintf(fout, "%c%c%c ", mnem_1[mnem], mnem_2[mnem], mnem_3[mnem]);
// Pring argument
switch (mode) {
case A_IMPL:
break;
case A_ACCU:
fprintf(fout, "a");
break;
case A_IMM:
fprintf(fout, "#%02lx", lo);
break;
case A_REL:
fprintf(fout, "%04lx", ((adr + 2) + (int8)lo) & 0xffff);
break;
case A_ZERO:
fprintf(fout, "%02lx", lo);
break;
case A_ZEROX:
fprintf(fout, "%02lx,x", lo);
break;
case A_ZEROY:
fprintf(fout, "%02lx,y", lo);
break;
case A_ABS:
fprintf(fout, "%04lx", (hi << 8) | lo);
break;
case A_ABSX:
fprintf(fout, "%04lx,x", (hi << 8) | lo);
break;
case A_ABSY:
fprintf(fout, "%04lx,y", (hi << 8) | lo);
break;
case A_IND:
fprintf(fout, "(%04lx)", (hi << 8) | lo);
break;
case A_INDX:
fprintf(fout, "(%02lx,x)", lo);
break;
case A_INDY:
fprintf(fout, "(%02lx),y", lo);
break;
}
fputc('\n', fout);
return adr_length[mode];
}
/*
* Assemble
* a [start]
*/
static void assemble(void)
{
bool done = false;
char c1, c2, c3;
char mnem, mode;
uint8 opcode;
uint16 arg;
int16 rel;
// Read parameters
if (!address_args())
return;
do {
fprintf(fout, "%04lx> ", address);
fflush(ferr);
read_line();
c1 = get_char();
c2 = get_char();
c3 = get_char();
if (c1 != '\n') {
if ((mnem = find_mnemonic(c1, c2, c3)) != M_ILLEGAL) {
get_token();
if (instr_args(&arg, &mode)) {
// Convert A_IMPL -> A_ACCU if necessary
if ((mode == A_IMPL) && find_opcode(mnem, A_ACCU, &opcode))
mode = A_ACCU;
// Handle relative addressing seperately
if (((mode == A_ABS) || (mode == A_ZERO)) && find_opcode(mnem, A_REL, &opcode)) {
mode = A_REL;
rel = arg - (address + 2) & 0xffff;
if ((rel < -128) || (rel > 127)) {
error("Branch too long");
continue;
} else
arg = rel & 0xff;
}
if (find_opcode(mnem, mode, &opcode)) {
// Print disassembled line
fprintf(fout, "\v%04lx:", address);
disass_line(address, opcode, arg & 0xff, arg >> 8);
switch (adr_length[mode]) {
case 1:
SAMWriteByte(address++, opcode);
break;
case 2:
SAMWriteByte(address++, opcode);
SAMWriteByte(address++, arg);
break;
case 3:
SAMWriteByte(address++, opcode);
SAMWriteByte(address++, arg & 0xff);
SAMWriteByte(address++, arg >> 8);
break;
default:
error("Internal error");
break;
}
} else
error("Addressing mode not supported by instruction");
} else
error("Unrecognized addressing mode");
} else
error("Unknown instruction");
} else // Input is terminated with a blank line
done = true;
} while (!done);
}
/*
* Find mnemonic code to three letters
* M_ILLEGAL: No matching mnemonic found
*/
static char find_mnemonic(char op1, char op2, char op3)
{
int i;
for (i=0; i<M_MAXIMUM; i++)
if ((mnem_1[i] == op1) && (mnem_2[i] == op2) && (mnem_3[i] == op3))
return i;
return M_ILLEGAL;
}
/*
* Determine opcode of an instruction given mnemonic and addressing mode
* true: OK, false: Mnemonic can't have specified addressing mode
*/
static bool find_opcode(char mnem, char mode, uint8 *opcode)
{
int i;
for (i=0; i<256; i++)
if ((mnemonic[i] == mnem) && (adr_mode[i] == mode)) {
*opcode = i;
return true;
}
return false;
}
/*
* Show/set memory configuration
* k [config]
*/
static void mem_config(void)
{
uint16 con;
if (the_token != T_END)
if (!expression(&con))
return;
else
TheCPU->ExtConfig = con;
else
con = TheCPU->ExtConfig;
fprintf(fout, "Configuration: %ld\n", con & 7);
fprintf(fout, "A000-BFFF: %s\n", (con & 3) == 3 ? "Basic" : "RAM");
fprintf(fout, "D000-DFFF: %s\n", (con & 3) ? ((con & 4) ? "I/O" : "Char") : "RAM");
fprintf(fout, "E000-FFFF: %s\n", (con & 2) ? "Kernal" : "RAM");
}
/*
* Fill
* f start end byte
*/
static void fill(void)
{
bool done = false;
uint16 adr, end_adr, value;
if (!expression(&adr))
return;
if (!expression(&end_adr))
return;
if (!expression(&value))
return;
do {
if (adr == end_adr) done = true;
SAMWriteByte(adr++, value);
} while (!done);
}
/*
* Compare
* c start end dest
*/
static void compare(void)
{
bool done = false;
uint16 adr, end_adr, dest;
int num = 0;
if (!expression(&adr))
return;
if (!expression(&end_adr))
return;
if (!expression(&dest))
return;
do {
if (adr == end_adr) done = true;
if (SAMReadByte(adr) != SAMReadByte(dest)) {
fprintf(fout, "%04lx ", adr);
num++;
if (!(num & 7))
fputc('\n', fout);
}
adr++; dest++;
} while (!done && !aborted());
if (num & 7)
fputc('\n', fout);
fprintf(fout, "%ld byte(s) different\n", num);
}
/*
* Transfer memory
* t start end dest
*/
static void transfer(void)
{
bool done = false;
uint16 adr, end_adr, dest;
if (!expression(&adr))
return;
if (!expression(&end_adr))
return;
if (!expression(&dest))
return;
if (dest < adr)
do {
if (adr == end_adr) done = true;
SAMWriteByte(dest++, SAMReadByte(adr++));
} while (!done);
else {
dest += end_adr - adr;
do {
if (adr == end_adr) done = true;
SAMWriteByte(dest--, SAMReadByte(end_adr--));
} while (!done);
}
}
/*
* Change memory
* : addr {byte}
*/
static void modify(void)
{
uint16 adr, val;
if (!expression(&adr))
return;
while (the_token != T_END)
if (expression(&val))
SAMWriteByte(adr++, val);
else
return;
}
/*
* Compute and display expression
* ? expression
*/
static void print_expr(void)
{
uint16 val;
if (!expression(&val))
return;
fprintf(fout, "Hex: %04lx\nDec: %lu\n", val, val);
}
/*
* Redirect output
* o [file]
*/
static void redir_output(void)
{
// Close old file
if (fout != ferr) {
fclose(fout);
fout = ferr;
return;
}
// No argument given?
if (the_token == T_END)
return;
// Otherwise open file
if (the_token == T_STRING) {
if (!(fout = fopen(the_string, "w")))
error("Unable to open file");
} else
error("'\"' around file name expected");
}
/*
* Display interrupt vectors
*/
static void int_vectors(void)
{
fprintf(fout, " IRQ BRK NMI\n");
fprintf(fout, "%d : %04lx %04lx %04lx\n",
access_1541 ? 6502 : 6510,
SAMReadByte(0xffff) << 8 | SAMReadByte(0xfffe),
SAMReadByte(0xffff) << 8 | SAMReadByte(0xfffe),
SAMReadByte(0xfffb) << 8 | SAMReadByte(0xfffa));
if (!access_1541 && TheCPU->ExtConfig & 2)
fprintf(fout, "Kernal: %04lx %04lx %04lx\n",
SAMReadByte(0x0315) << 8 | SAMReadByte(0x0314),
SAMReadByte(0x0317) << 8 | SAMReadByte(0x0316),
SAMReadByte(0x0319) << 8 | SAMReadByte(0x0318));
}
/*
* Display state of custom chips
*/
static void view_state(void)
{
switch (get_char()) {
case 'c': // CIA
view_cia_state();
break;
case 's': // SID
view_sid_state();
break;
case 'v': // VIC
view_vic_state();
break;
case 'f': // Floppy
view_1541_state();
break;
default:
error("Unknown command");
break;
}
}
static void view_cia_state(void)
{
MOS6526State cs;
switch (get_char()) {
case '1':
TheCIA1->GetState(&cs);
break;
case '2':
TheCIA2->GetState(&cs);
break;
default:
error("Unknown command");
return;
}
fprintf(fout, "Timer A : %s\n", cs.cra & 1 ? "On" : "Off");
fprintf(fout, " Counter : %04lx Latch: %04lx\n", (cs.ta_hi << 8) | cs.ta_lo, cs.latcha);
fprintf(fout, " Run mode: %s\n", cs.cra & 8 ? "One-shot" : "Continuous");
fprintf(fout, " Input : %s\n", cs.cra & 0x20 ? "CNT" : "Phi2");
fprintf(fout, " Output : ");
if (cs.cra & 2)
if (cs.cra & 4)
fprintf(fout, "PB6 Toggle\n\n");
else
fprintf(fout, "PB6 Pulse\n\n");
else
fprintf(fout, "None\n\n");
fprintf(fout, "Timer B : %s\n", cs.crb & 1 ? "On" : "Off");
fprintf(fout, " Counter : %04lx Latch: %04lx\n", (cs.tb_hi << 8) | cs.tb_lo, cs.latchb);
fprintf(fout, " Run mode: %s\n", cs.crb & 8 ? "One-shot" : "Continuous");
fprintf(fout, " Input : ");
if (cs.crb & 0x40)
if (cs.crb & 0x20)
fprintf(fout, "Timer A underflow (CNT high)\n");
else
fprintf(fout, "Timer A underflow\n");
else
if (cs.crb & 0x20)
fprintf(fout, "CNT\n");
else
fprintf(fout, "Phi2\n");
fprintf(fout, " Output : ");
if (cs.crb & 2)
if (cs.crb & 4)
fprintf(fout, "PB7 Toggle\n\n");
else
fprintf(fout, "PB7 Pulse\n\n");
else
fprintf(fout, "None\n\n");
fprintf(fout, "TOD : %lx%lx:%lx%lx:%lx%lx.%lx %s\n",
(cs.tod_hr >> 4) & 1, cs.tod_hr & 0x0f,
(cs.tod_min >> 4) & 7, cs.tod_min & 0x0f,
(cs.tod_sec >> 4) & 7, cs.tod_sec & 0x0f,
cs.tod_10ths & 0x0f, cs.tod_hr & 0x80 ? "PM" : "AM");
fprintf(fout, "Alarm : %lx%lx:%lx%lx:%lx%lx.%lx %s\n",
(cs.alm_hr >> 4) & 1, cs.alm_hr & 0x0f,
(cs.alm_min >> 4) & 7, cs.alm_min & 0x0f,
(cs.alm_sec >> 4) & 7, cs.alm_sec & 0x0f,
cs.alm_10ths & 0x0f, cs.alm_hr & 0x80 ? "PM" : "AM");
fprintf(fout, "TOD input : %s\n", cs.cra & 0x80 ? "50Hz" : "60Hz");
fprintf(fout, "Write to : %s registers\n\n", cs.crb & 0x80 ? "Alarm" : "TOD");
fprintf(fout, "Serial data : %02lx\n", cs.sdr);
fprintf(fout, "Serial mode : %s\n\n", cs.cra & 0x40 ? "Output" : "Input");
fprintf(fout, "Pending int.: ");
dump_cia_ints(cs.int_data);
fprintf(fout, "Enabled int.: ");
dump_cia_ints(cs.int_mask);
}
static void dump_cia_ints(uint8 i)
{
if (i & 0x1f) {
if (i & 1) fprintf(fout, "TA ");
if (i & 2) fprintf(fout, "TB ");
if (i & 4) fprintf(fout, "Alarm ");
if (i & 8) fprintf(fout, "Serial ");
if (i & 0x10) fprintf(fout, "Flag");
} else
fprintf(fout, "None");
fputc('\n', fout);
}
static void view_sid_state(void)
{
MOS6581State ss;
TheSID->GetState(&ss);
fprintf(fout, "Voice 1\n");
fprintf(fout, " Frequency : %04lx\n", (ss.freq_hi_1 << 8) | ss.freq_lo_1);
fprintf(fout, " Pulse Width: %04lx\n", ((ss.pw_hi_1 & 0x0f) << 8) | ss.pw_lo_1);
fprintf(fout, " Env. (ADSR): %lx %lx %lx %lx\n", ss.AD_1 >> 4, ss.AD_1 & 0x0f, ss.SR_1 >> 4, ss.SR_1 & 0x0f);
fprintf(fout, " Waveform : ");
dump_sid_waveform(ss.ctrl_1);
fprintf(fout, " Gate : %s Ring mod.: %s\n", ss.ctrl_1 & 0x01 ? "On " : "Off", ss.ctrl_1 & 0x04 ? "On" : "Off");
fprintf(fout, " Test bit : %s Synchron.: %s\n", ss.ctrl_1 & 0x08 ? "On " : "Off", ss.ctrl_1 & 0x02 ? "On" : "Off");
fprintf(fout, " Filter : %s\n", ss.res_filt & 0x01 ? "On" : "Off");
fprintf(fout, "\nVoice 2\n");
fprintf(fout, " Frequency : %04lx\n", (ss.freq_hi_2 << 8) | ss.freq_lo_2);
fprintf(fout, " Pulse Width: %04lx\n", ((ss.pw_hi_2 & 0x0f) << 8) | ss.pw_lo_2);
fprintf(fout, " Env. (ADSR): %lx %lx %lx %lx\n", ss.AD_2 >> 4, ss.AD_2 & 0x0f, ss.SR_2 >> 4, ss.SR_2 & 0x0f);
fprintf(fout, " Waveform : ");
dump_sid_waveform(ss.ctrl_2);
fprintf(fout, " Gate : %s Ring mod.: %s\n", ss.ctrl_2 & 0x01 ? "On " : "Off", ss.ctrl_2 & 0x04 ? "On" : "Off");
fprintf(fout, " Test bit : %s Synchron.: %s\n", ss.ctrl_2 & 0x08 ? "On " : "Off", ss.ctrl_2 & 0x02 ? "On" : "Off");
fprintf(fout, " Filter : %s\n", ss.res_filt & 0x02 ? "On" : "Off");
fprintf(fout, "\nVoice 3\n");
fprintf(fout, " Frequency : %04lx\n", (ss.freq_hi_3 << 8) | ss.freq_lo_3);
fprintf(fout, " Pulse Width: %04lx\n", ((ss.pw_hi_3 & 0x0f) << 8) | ss.pw_lo_3);
fprintf(fout, " Env. (ADSR): %lx %lx %lx %lx\n", ss.AD_3 >> 4, ss.AD_3 & 0x0f, ss.SR_3 >> 4, ss.SR_3 & 0x0f);
fprintf(fout, " Waveform : ");
dump_sid_waveform(ss.ctrl_3);
fprintf(fout, " Gate : %s Ring mod.: %s\n", ss.ctrl_3 & 0x01 ? "On " : "Off", ss.ctrl_3 & 0x04 ? "On" : "Off");
fprintf(fout, " Test bit : %s Synchron.: %s\n", ss.ctrl_3 & 0x08 ? "On " : "Off", ss.ctrl_3 & 0x02 ? "On" : "Off");
fprintf(fout, " Filter : %s Mute : %s\n", ss.res_filt & 0x04 ? "On" : "Off", ss.mode_vol & 0x80 ? "Yes" : "No");
fprintf(fout, "\nFilters/Volume\n");
fprintf(fout, " Frequency: %04lx\n", (ss.fc_hi << 3) | (ss.fc_lo & 0x07));
fprintf(fout, " Resonance: %lx\n", ss.res_filt >> 4);
fprintf(fout, " Mode : ");
if (ss.mode_vol & 0x70) {
if (ss.mode_vol & 0x10) fprintf(fout, "Low-pass ");
if (ss.mode_vol & 0x20) fprintf(fout, "Band-pass ");
if (ss.mode_vol & 0x40) fprintf(fout, "High-pass");
} else
fprintf(fout, "None");
fprintf(fout, "\n Volume : %lx\n", ss.mode_vol & 0x0f);
}
static void dump_sid_waveform(uint8 wave)
{
if (wave & 0xf0) {
if (wave & 0x10) fprintf(fout, "Triangle ");
if (wave & 0x20) fprintf(fout, "Sawtooth ");
if (wave & 0x40) fprintf(fout, "Rectangle ");
if (wave & 0x80) fprintf(fout, "Noise");
} else
fprintf(fout, "None");
fputc('\n', fout);
}
static void view_vic_state(void)
{
MOS6569State vs;
short i;
TheVIC->GetState(&vs);
fprintf(fout, "Raster line : %04lx\n", vs.raster | ((vs.ctrl1 & 0x80) << 1));
fprintf(fout, "IRQ raster line : %04lx\n\n", vs.irq_raster);
fprintf(fout, "X scroll : %ld\n", vs.ctrl2 & 7);
fprintf(fout, "Y scroll : %ld\n", vs.ctrl1 & 7);
fprintf(fout, "Horizontal border : %ld columns\n", vs.ctrl2 & 8 ? 40 : 38);
fprintf(fout, "Vertical border : %ld rows\n\n", vs.ctrl1 & 8 ? 25 : 24);
fprintf(fout, "Display mode : ");
switch (((vs.ctrl1 >> 4) & 6) | ((vs.ctrl2 >> 4) & 1)) {
case 0:
fprintf(fout, "Standard text\n");
break;
case 1:
fprintf(fout, "Multicolor text\n");
break;
case 2:
fprintf(fout, "Standard bitmap\n");
break;
case 3:
fprintf(fout, "Multicolor bitmap\n");
break;
case 4:
fprintf(fout, "ECM text\n");
break;
case 5:
fprintf(fout, "Invalid text (ECM+MCM)\n");
break;
case 6:
fprintf(fout, "Invalid bitmap (ECM+BMM)\n");
break;
case 7:
fprintf(fout, "Invalid bitmap (ECM+BMM+ECM)\n");
break;
}
fprintf(fout, "Sequencer state : %s\n", vs.display_state ? "Display" : "Idle");
fprintf(fout, "Bad line state : %s\n", vs.bad_line ? "Yes" : "No");
fprintf(fout, "Bad lines enabled : %s\n", vs.bad_line_enable ? "Yes" : "No");
fprintf(fout, "Video counter : %04lx\n", vs.vc);
fprintf(fout, "Video counter base: %04lx\n", vs.vc_base);
fprintf(fout, "Row counter : %ld\n\n", vs.rc);
fprintf(fout, "VIC bank : %04lx-%04lx\n", vs.bank_base, vs.bank_base + 0x3fff);
fprintf(fout, "Video matrix base : %04lx\n", vs.matrix_base);
fprintf(fout, "Character base : %04lx\n", vs.char_base);
fprintf(fout, "Bitmap base : %04lx\n\n", vs.bitmap_base);
fprintf(fout, " Spr.0 Spr.1 Spr.2 Spr.3 Spr.4 Spr.5 Spr.6 Spr.7\n");
fprintf(fout, "Enabled: "); dump_spr_flags(vs.me);
fprintf(fout, "Data : %04lx %04lx %04lx %04lx %04lx %04lx %04lx %04lx\n",
vs.sprite_base[0], vs.sprite_base[1], vs.sprite_base[2], vs.sprite_base[3],
vs.sprite_base[4], vs.sprite_base[5], vs.sprite_base[6], vs.sprite_base[7]);
fprintf(fout, "MC : %02lx %02lx %02lx %02lx %02lx %02lx %02lx %02lx\n",
vs.mc[0], vs.mc[1], vs.mc[2], vs.mc[3], vs.mc[4], vs.mc[5], vs.mc[6], vs.mc[7]);
fprintf(fout, "Mode : ");
for (i=0; i<8; i++)
if (vs.mmc & (1<<i))
fprintf(fout, "Multi ");
else
fprintf(fout, "Std. ");
fprintf(fout, "\nX-Exp. : "); dump_spr_flags(vs.mxe);
fprintf(fout, "Y-Exp. : "); dump_spr_flags(vs.mye);
fprintf(fout, "Prio. : ");
for (i=0; i<8; i++)
if (vs.mdp & (1<<i))
fprintf(fout, "Back ");
else
fprintf(fout, "Fore ");
fprintf(fout, "\n\nPending interrupts: ");
dump_vic_ints(vs.irq_flag);
fprintf(fout, "Enabled interrupts: ");
dump_vic_ints(vs.irq_mask);
}
static void dump_spr_flags(uint8 f)
{
short i;
for (i=0; i<8; i++)
if (f & (1<<i))
fprintf(fout, "Yes ");
else
fprintf(fout, "No ");
fputc('\n', fout);
}
static void dump_vic_ints(uint8 i)
{
if (i & 0x1f) {
if (i & 1) fprintf(fout, "Raster ");
if (i & 2) fprintf(fout, "Spr-Data ");
if (i & 4) fprintf(fout, "Spr-Spr ");
if (i & 8) fprintf(fout, "Lightpen");
} else
fprintf(fout, "None");
fputc('\n', fout);
}
static void view_1541_state(void)
{
fprintf(fout, "VIA 1:\n");
fprintf(fout, " Timer 1 Counter: %04x Latch: %04x\n", R1541.via1_t1c, R1541.via1_t1l);
fprintf(fout, " Timer 2 Counter: %04x Latch: %04x\n", R1541.via1_t2c, R1541.via1_t2l);
fprintf(fout, " ACR: %02x\n", R1541.via1_acr);
fprintf(fout, " PCR: %02x\n", R1541.via1_pcr);
fprintf(fout, " Pending interrupts: ");
dump_via_ints(R1541.via1_ifr);
fprintf(fout, " Enabled interrupts: ");
dump_via_ints(R1541.via1_ier);
fprintf(fout, "\nVIA 2:\n");
fprintf(fout, " Timer 1 Counter: %04x Latch: %04x\n", R1541.via2_t1c, R1541.via2_t1l);
fprintf(fout, " Timer 2 Counter: %04x Latch: %04x\n", R1541.via2_t2c, R1541.via2_t2l);
fprintf(fout, " ACR: %02x\n", R1541.via2_acr);
fprintf(fout, " PCR: %02x\n", R1541.via2_pcr);
fprintf(fout, " Pending interrupts: ");
dump_via_ints(R1541.via2_ifr);
fprintf(fout, " Enabled interrupts: ");
dump_via_ints(R1541.via2_ier);
}
static void dump_via_ints(uint8 i)
{
if (i & 0x7f) {
if (i & 0x40) fprintf(fout, "T1 ");
if (i & 0x20) fprintf(fout, "T2 ");
if (i & 2) fprintf(fout, "CA1 ");
if (i & 1) fprintf(fout, "CA2 ");
if (i & 0x10) fprintf(fout, "CB1 ");
if (i & 8) fprintf(fout, "CB2 ");
if (i & 4) fprintf(fout, "Serial ");
} else
fprintf(fout, "None");
fputc('\n', fout);
}
/*
* Load data
* l start "file"
*/
static void load_data(void)
{
uint16 adr;
FILE *file;
int fc;
if (!expression(&adr))
return;
if (the_token == T_END) {
error("Missing file name");
return;
}
if (the_token != T_STRING) {
error("'\"' around file name expected");
return;
}
if (!(file = fopen(the_string, "rb")))
error("Unable to open file");
else {
while ((fc = fgetc(file)) != EOF)
SAMWriteByte(adr++, fc);
fclose(file);
}
}
/*
* Save data
* s start end "file"
*/
static void save_data(void)
{
bool done = false;
uint16 adr, end_adr;
FILE *file;
if (!expression(&adr))
return;
if (!expression(&end_adr))
return;
if (the_token == T_END) {
error("Missing file name");
return;
}
if (the_token != T_STRING) {
error("'\"' around file name expected");
return;
}
if (!(file = fopen(the_string, "wb")))
error("Unable to create file");
else {
do {
if (adr == end_adr) done = true;
fputc(SAMReadByte(adr++), file);
} while (!done);
fclose(file);
}
}
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