diff --git a/AUTHORS b/AUTHORS new file mode 100755 index 0000000..5804299 --- /dev/null +++ b/AUTHORS @@ -0,0 +1,6 @@ +napple1: +Nobu Hatano + +Pom1: +John D. Corrado +Verhille Arnaud diff --git a/CHANGELOG b/CHANGELOG new file mode 100755 index 0000000..969344a --- /dev/null +++ b/CHANGELOG @@ -0,0 +1,81 @@ +CHANGELOG +========= + +2.2.1 +- Fix leaking memory on fd of loadBasic() function +- Fix some coding style issue in memory.c and msgbuf.c + +2.2 +- Add Cygwin (with cygwin base, make, gcc4 and libncurses-dev) support +- Fix Hung after Hardreset. + +2.1 +- If a loading core has a value on the 0xF000 area, the mode + should be better change to 32K mode. +- Update SAMPLE_PROGRAMS file. + +2.0 +- Remove TODO list. +- Synchronize video output for ideal 60 Hz screen refresh. +- Remove terminalSpeed configuration. Now it is 60Hz only. +- Remove replica1 config in napple1.cfg and No more napple1.cfg. +- Mode change command filp 8K memory mode & 32K memory mode +- Delete unused charmap.rom +- Rename core/STARTREK to core/startrek + +1.0 +- Filename input for Load core. +- Confirmation to load basic to ram. +- Command list on the message buffer. +- Remove default core and basic.rom loading function. +- TODO file added. + +0.6 +- March 29, 2010 +- Modify makefile as using macros for common options. +- Add #define _XOPEN_SOURCE 500 to prevent compile warning of usleep. +- Add filename input feature for 'D'ump core. + +0.5 +- March 25, 2010 +- Fix time tic in m6502. To get milli sec current time, use gettimeofday. +- Wall option at compile. So, several fix in m6502.c to get rid of warnings. + +0.4 +- March 25, 2010 +- Fix some descriptions in READE and SAMPLE_PROGRAMS +- Use independant ncurses windows for main screen and message buffer, + instead of a single stdscr. The new screen layoht is following. + During loading rom and core, printing some messages to the buffer. + + +-----------------------------+ + |(0,0) (0, 40)| + | screen | + | | + |(23,0) (23,40)| + +-----------------------------+ + |(24,0) message buffer (24,40)| + +-----------------------------+ + +0.3 +- March 21, 2010 +- Update README +- Allow smaller lines/colums terminal + +0.2 +- March 18, 2010 +- Delete automatic save memory function during quit. +- Shift + D "Dump core" +- Dump & Load core on file core/dumped +- Add sample core file in core directory + +0.1 +- March 16, 2010 +- Fixed old program name nPom1 to napple1. +- napple1 now includes Pom1 rom. +- if napple1 started with normal mode, and if core file + isn't existing, load rom/basic.rom to ram 0xE000. + +0.0 +- March 15, 2010 +- Derived from Pom1. 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + 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 + + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/SAMPLE_PROGRAMS b/SAMPLE_PROGRAMS new file mode 100755 index 0000000..22a9d5b --- /dev/null +++ b/SAMPLE_PROGRAMS @@ -0,0 +1,22 @@ +SAMPLE PROGRAMS +=============== + +STARTREK +-------- +Original code is downloaded from http://www.brielcomputers.com/files/games.zip +How to start it. + + ./napple1 + Shift + L (Load core) + Load core. Filename: startrek (core/startrek) + E2B3R (re-entry to BASIC) + RUN (start program in BASIC) + +KRUSADER +-------- +Replica1's assembler. It is in startrek rom also. + + ./napple1 + Shift + L (Load core) + Load core. Filename: startrek (core/startrek) + F000R (cold start KRUSADER) diff --git a/core/startrek b/core/startrek new file mode 100755 index 0000000..a5b62f6 Binary files /dev/null and b/core/startrek differ diff --git a/rom/basic.rom b/rom/basic.rom new file mode 100755 index 0000000..cdd0fb5 Binary files /dev/null and b/rom/basic.rom differ diff --git a/rom/monitor.rom b/rom/monitor.rom new file mode 100755 index 0000000..7280907 Binary files /dev/null and b/rom/monitor.rom differ diff --git a/src/keyboard.c b/src/keyboard.c new file mode 100755 index 0000000..f66628a --- /dev/null +++ b/src/keyboard.c @@ -0,0 +1,79 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include "m6502.h" +#include "pia6820.h" +#include "memory.h" +#include "keyboard.h" +#include "screen.h" + +int handleInput(void) +{ + char tmp; + + tmp = '\0'; + while ( (tmp = getch_screen()) == '\0' ) + ; + if (tmp == 'B') { + loadBasic(); + resetPia6820(); + resetM6502(); + return 1; + } else if (tmp == 'L') { + loadCore(); + resetPia6820(); + resetM6502(); + return 1; + } else if (tmp == 'D') { + dumpCore(); + resetPia6820(); + resetM6502(); + return 1; + } else if (tmp == 'R') { + resetPia6820(); + resetM6502(); + return 1; + } else if (tmp == 'H') { + resetScreen(); + resetPia6820(); + resetMemory(); + resetM6502(); + return 1; + } else if (tmp == 'Q') { + return 0; + } else if (tmp == 'M') { + flipMode(); + resetPia6820(); + resetM6502(); + return 1; + } else if (tmp == '\n') { + tmp = '\r'; + } else if (tmp == '\b') { + tmp = 0x5f; + } else if (tmp >= 'a' && tmp <= 'z') { + tmp = tmp - 'a' + 'A'; + } + + writeKbd((unsigned char)(tmp + 0x80)); + writeKbdCr(0xA7); + + return 1; +} diff --git a/src/keyboard.h b/src/keyboard.h new file mode 100755 index 0000000..990226f --- /dev/null +++ b/src/keyboard.h @@ -0,0 +1,22 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +int handleInput(void); diff --git a/src/m6502.c b/src/m6502.c new file mode 100755 index 0000000..36af85e --- /dev/null +++ b/src/m6502.c @@ -0,0 +1,1829 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#define _XOPEN_SOURCE 500 +#include +#include +#include +#include +#include +#include + +#include "m6502.h" +#include "pia6820.h" +#include "memory.h" + +#define N 0x80 +#define V 0x40 +#define M 0x20 +#define B 0x10 +#define D 0x08 +#define I 0x04 +#define Z 0x02 +#define C 0x01 + +static unsigned char accumulator, xRegister, yRegister, statusRegister = 0x24, stackPointer; +static int IRQ = 0, NMI = 0; +static unsigned short programCounter; +static unsigned char btmp; +static unsigned short op, opH, opL, ptr, ptrH, ptrL, tmp; +static pthread_t thread; +static int cycles; + +/* sync is a synchronization between real time and ideal time of apple 1 */ +static int sync_cycles; /* cycles per 1 sync */ +static int sync_interval; /* sync interval time in m sec */ +static long long interval_start; /* interval start time in m sec from 0 time */ + +static unsigned short memReadAbsolute(unsigned short adr) +{ + return (memRead(adr) | memRead((unsigned short)(adr + 1)) << 8); +} + +static void synchronize(void) +{ + int processed; /* processed real time in m sec */ + int delay; /* delay m sec to be added to real time */ + struct timeval t; + + gettimeofday(&t, NULL); + processed = (int)(t.tv_usec / 1000 + + t.tv_sec * 1000 + - interval_start); + if (processed < 0) + processed = 0; + delay = sync_interval - processed; + if (delay < 0) + delay = 0; + usleep((unsigned int)(delay * 1000)); /* m sec to u sec */ + + gettimeofday(&t, NULL); + interval_start = (long long)(t.tv_usec / 1000 + + t.tv_sec * 1000); +} + +static void pushProgramCounter(void) +{ + memWrite((unsigned short)(stackPointer + 0x100), (unsigned char)(programCounter >> 8)); + stackPointer--; + memWrite((unsigned short)(stackPointer + 0x100), (unsigned char)programCounter); + stackPointer--; + cycles += 2; +} + +static void popProgramCounter(void) +{ + stackPointer++; + programCounter = memRead((unsigned short)(stackPointer + 0x100)); + stackPointer++; + programCounter += memRead((unsigned short)(stackPointer + 0x100)) << 8; + cycles += 2; +} + +static void handleIRQ(void) +{ + pushProgramCounter(); + memWrite((unsigned short)(0x100 + stackPointer), (unsigned char)(statusRegister & ~0x10)); + stackPointer--; + statusRegister |= I; + programCounter = memReadAbsolute(0xFFFE); + cycles += 8; +} + +static void handleNMI(void) +{ + pushProgramCounter(); + memWrite((unsigned short)(0x100 + stackPointer), (unsigned char)(statusRegister & ~0x10)); + stackPointer--; + statusRegister |= I; + NMI = 0; + programCounter = memReadAbsolute(0xFFFA); + cycles += 8; +} + +static void Imp(void) +{ + cycles++; +} + +static void Imm(void) +{ + op = programCounter++; +} + +static void Zero(void) +{ + op = memRead(programCounter++); + cycles++; +} + +static void ZeroX(void) +{ + op = (memRead(programCounter++) + xRegister) & 0xFF; + cycles++; +} + +static void ZeroY(void) +{ + op = (memRead(programCounter++) + yRegister) & 0xFF; + cycles++; +} + +static void Abs(void) +{ + op = memReadAbsolute(programCounter); + programCounter += 2; + cycles += 2; +} + +static void AbsX(void) +{ + opL = memRead(programCounter++) + xRegister; + opH = memRead(programCounter++) << 8; + cycles += 2; + + if (opL >= 0x100) + cycles++; + + op = opH + opL; +} + +static void AbsY(void) +{ + opL = memRead(programCounter++) + yRegister; + opH = memRead(programCounter++) << 8; + cycles += 2; + + if (opL >= 0x100) + cycles++; + + op = opH + opL; +} + +static void Ind(void) +{ + ptrL = memRead(programCounter++); + ptrH = memRead(programCounter++) << 8; + op = memRead((unsigned short)(ptrH + ptrL)); + ptrL = (ptrL + 1) & 0xFF; + op += memRead((unsigned short)(ptrH + ptrL)) << 8; + cycles += 4; +} + +static void IndZeroX(void) +{ + ptr = xRegister + memRead(programCounter++); + op = memRead(ptr); + op += memRead((unsigned short)((ptr + 1) & 0xFF)) << 8; + cycles += 3; +} + +static void IndZeroY(void) +{ + ptr = memRead(programCounter++); + opL = memRead(ptr) + yRegister; + opH = memRead((unsigned short)(ptr + 1)) << 8; + cycles += 3; + + if (opL >= 0x100) + cycles++; + + op = opH + opL; +} + +static void Rel(void) +{ + op = memRead(programCounter++); + + if (op >= 0x80) + op |= 0xFF00; + + op += programCounter; + cycles++; +} + +static void WAbsX(void) +{ + opL = memRead(programCounter++) + xRegister; + opH = memRead(programCounter++) << 8; + cycles += 3; + op = opH + opL; +} + +static void WAbsY(void) +{ + opL = memRead(programCounter++) + yRegister; + opH = memRead(programCounter++) << 8; + cycles += 3; + op = opH + opL; +} + +void static WIndZeroY(void) +{ + ptr = memRead(programCounter++); + opL = memRead(ptr) + yRegister; + opH = memRead((unsigned short)((ptr + 1) & 0xFF)) << 8; + cycles += 4; + op = opH + opL; +} + +static void setStatusRegisterNZ(unsigned char val) +{ + if (val & 0x80) + statusRegister |= N; + else + statusRegister &= ~N; + + if (!val) + statusRegister |= Z; + else + statusRegister &= ~Z; +} + +static void LDA(void) +{ + accumulator = memRead(op); + setStatusRegisterNZ(accumulator); + cycles++; +} + +static void LDX(void) +{ + xRegister = memRead(op); + setStatusRegisterNZ(xRegister); + cycles++; +} + +static void LDY(void) +{ + yRegister = memRead(op); + setStatusRegisterNZ(yRegister); + cycles++; +} + +static void STA(void) +{ + memWrite(op, accumulator); + cycles++; +} + +static void STX(void) +{ + memWrite(op, xRegister); + cycles++; +} + +static void STY(void) +{ + memWrite(op, yRegister); + cycles++; +} + +static void setFlagCarry(unsigned short val) +{ + if (val & 0x100) + statusRegister |= C; + else + statusRegister &= ~C; +} + +static void ADC(void) +{ + unsigned short Op1 = accumulator, Op2 = memRead(op); + cycles++; + + if (statusRegister & D) + { + if (!((Op1 + Op2 + (statusRegister & C ? 1 : 0)) & 0xFF)) + statusRegister |= Z; + else + statusRegister &= ~Z; + + tmp = (Op1 & 0x0F) + (Op2 & 0x0F) + (statusRegister & C ? 1 : 0); + accumulator = tmp < 0x0A ? tmp : tmp + 6; + tmp = (Op1 & 0xF0) + (Op2 & 0xF0) + (tmp & 0xF0); + + if (tmp & 0x80) + statusRegister |= N; + else + statusRegister &= ~N; + + if ((Op1 ^ tmp) & ~(Op1 ^ Op2) & 0x80) + statusRegister |= V; + else + statusRegister &= ~V; + + tmp = (accumulator & 0x0F) | (tmp < 0xA0 ? tmp : tmp + 0x60); + + if (tmp >= 0x100) + statusRegister |= C; + else + statusRegister &= ~C; + + accumulator = tmp & 0xFF; + } + else + { + tmp = Op1 + Op2 + (statusRegister & C ? 1 : 0); + accumulator = tmp & 0xFF; + + if ((Op1 ^ accumulator) & ~(Op1 ^ Op2) & 0x80) + statusRegister |= V; + else + statusRegister &= ~V; + + setFlagCarry(tmp); + setStatusRegisterNZ(accumulator); + } +} + +static void setFlagBorrow(unsigned short val) +{ + if (!(val & 0x100)) + statusRegister |= C; + else + statusRegister &= ~C; +} + +static void SBC(void) +{ + unsigned short Op1 = accumulator, Op2 = memRead(op); + cycles++; + + if (statusRegister & D) + { + tmp = (Op1 & 0x0F) - (Op2 & 0x0F) - (statusRegister & C ? 0 : 1); + accumulator = !(tmp & 0x10) ? tmp : tmp - 6; + tmp = (Op1 & 0xF0) - (Op2 & 0xF0) - (accumulator & 0x10); + accumulator = (accumulator & 0x0F) | (!(tmp & 0x100) ? tmp : tmp - 0x60); + tmp = Op1 - Op2 - (statusRegister & C ? 0 : 1); + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); + } + else + { + tmp = Op1 - Op2 - (statusRegister & C ? 0 : 1); + accumulator = tmp & 0xFF; + + if ((Op1 ^ Op2) & (Op1 ^ accumulator) & 0x80) + statusRegister |= V; + else + statusRegister &= ~V; + + setFlagBorrow(tmp); + setStatusRegisterNZ(accumulator); + } +} + +static void CMP(void) +{ + tmp = accumulator - memRead(op); + cycles++; + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); +} + +static void CPX(void) +{ + tmp = xRegister - memRead(op); + cycles++; + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); +} + +static void CPY(void) +{ + tmp = yRegister - memRead(op); + cycles++; + setFlagBorrow(tmp); + setStatusRegisterNZ((unsigned char)tmp); +} + +static void AND(void) +{ + accumulator &= memRead(op); + cycles++; + setStatusRegisterNZ(accumulator); +} + +static void ORA(void) +{ + accumulator |= memRead(op); + cycles++; + setStatusRegisterNZ(accumulator); +} + +static void EOR(void) +{ + accumulator ^= memRead(op); + cycles++; + setStatusRegisterNZ(accumulator); +} + +static void ASL(void) +{ + btmp = memRead(op); + + if (btmp & 0x80) + statusRegister |= C; + else + statusRegister &= ~C; + + btmp <<= 1; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void ASL_A(void) +{ + tmp = accumulator << 1; + accumulator = tmp & 0xFF; + setFlagCarry(tmp); + setStatusRegisterNZ(accumulator); +} + +static void LSR(void) +{ + btmp = memRead(op); + + if (btmp & 1) + statusRegister |= C; + else + statusRegister &= ~C; + + btmp >>= 1; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void LSR_A(void) +{ + if (accumulator & 1) + statusRegister |= C; + else + statusRegister &= ~C; + + accumulator >>= 1; + setStatusRegisterNZ(accumulator); +} + +static void ROL(void) +{ + int newCarry; + + btmp = memRead(op); + newCarry = btmp & 0x80; + btmp = (btmp << 1) | (statusRegister & C ? 1 : 0); + + if (newCarry) + statusRegister |= C; + else + statusRegister &= ~C; + + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void ROL_A(void) +{ + tmp = (accumulator << 1) | (statusRegister & C ? 1 : 0); + accumulator = tmp & 0xFF; + setFlagCarry(tmp); + setStatusRegisterNZ(accumulator); +} + +static void ROR(void) +{ + int newCarry; + + btmp = memRead(op); + newCarry = btmp & 1; + btmp = (btmp >> 1) | (statusRegister & C ? 0x80 : 0); + + if (newCarry) + statusRegister |= C; + else + statusRegister &= ~C; + + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 3; +} + +static void ROR_A(void) +{ + tmp = accumulator | (statusRegister & C ? 0x100 : 0); + + if (accumulator & 1) + statusRegister |= C; + else + statusRegister &= ~C; + + accumulator = tmp >> 1; + setStatusRegisterNZ(accumulator); +} + +static void INC(void) +{ + btmp = memRead(op); + btmp++; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 2; +} + +static void DEC(void) +{ + btmp = memRead(op); + btmp--; + setStatusRegisterNZ(btmp); + memWrite(op, btmp); + cycles += 2; +} + +static void INX(void) +{ + xRegister++; + setStatusRegisterNZ(xRegister); +} + +static void INY(void) +{ + yRegister++; + setStatusRegisterNZ(yRegister); +} + +static void DEX(void) +{ + xRegister--; + setStatusRegisterNZ(xRegister); +} + +static void DEY(void) +{ + yRegister--; + setStatusRegisterNZ(yRegister); +} + +static void BIT(void) +{ + btmp = memRead(op); + + if (btmp & 0x40) + statusRegister |= V; + else + statusRegister &= ~V; + + if (btmp & 0x80) + statusRegister |= N; + else + statusRegister &= ~N; + + if (!(btmp & accumulator)) + statusRegister |= Z; + else + statusRegister &= ~Z; + + cycles++; +} + +static void PHA(void) +{ + memWrite((unsigned short)(0x100 + stackPointer), accumulator); + stackPointer--; + cycles++; +} + +static void PHP(void) +{ + memWrite((unsigned short)(0x100 + stackPointer), statusRegister); + stackPointer--; + cycles++; +} + +static void PLA(void) +{ + stackPointer++; + accumulator = memRead((unsigned short)(stackPointer + 0x100)); + setStatusRegisterNZ(accumulator); + cycles += 2; +} + +static void PLP(void) +{ + stackPointer++; + statusRegister = memRead((unsigned short)(stackPointer + 0x100)); + cycles += 2; +} + +static void BRK(void) +{ + pushProgramCounter(); + PHP(); + statusRegister |= B; + programCounter = memReadAbsolute(0xFFFE); + cycles += 3; +} + +static void RTI(void) +{ + PLP(); + popProgramCounter(); + cycles++; +} + +static void JMP(void) +{ + programCounter = op; +} + +static void RTS(void) +{ + popProgramCounter(); + programCounter++; + cycles += 2; +} + +static void JSR(void) +{ + opL = memRead(programCounter++); + pushProgramCounter(); + programCounter = opL + (memRead(programCounter) << 8); + cycles += 3; +} + +static void branch(void) +{ + cycles++; + + if ((programCounter & 0xFF00) != (op & 0xFF00)) + cycles++; + + programCounter = op; +} + +static void BNE(void) +{ + if (!(statusRegister & Z)) + branch(); +} + +static void BEQ(void) +{ + if (statusRegister & Z) + branch(); +} + +static void BVC(void) +{ + if (!(statusRegister & V)) + branch(); +} + +static void BVS(void) +{ + if (statusRegister & V) + branch(); +} + +static void BCC(void) +{ + if (!(statusRegister & C)) + branch(); +} + +static void BCS(void) +{ + if (statusRegister & C) + branch(); +} + +static void BPL(void) +{ + if (!(statusRegister & N)) + branch(); +} + +static void BMI(void) +{ + if (statusRegister & N) + branch(); +} + +static void TAX(void) +{ + xRegister = accumulator; + setStatusRegisterNZ(accumulator); +} + +static void TXA(void) +{ + accumulator = xRegister; + setStatusRegisterNZ(accumulator); +} + +static void TAY(void) +{ + yRegister = accumulator; + setStatusRegisterNZ(accumulator); +} + +static void TYA(void) +{ + accumulator = yRegister; + setStatusRegisterNZ(accumulator); +} + +static void TXS(void) +{ + stackPointer = xRegister; +} + +static void TSX(void) +{ + xRegister = stackPointer; + setStatusRegisterNZ(xRegister); +} + +static void CLC(void) +{ + statusRegister &= ~C; +} + +static void SEC(void) +{ + statusRegister |= C; +} + +static void CLI(void) +{ + statusRegister &= ~I; +} + +static void SEI(void) +{ + statusRegister |= I; +} + +static void CLV(void) +{ + statusRegister &= ~V; +} + +static void CLD(void) +{ + statusRegister &= ~D; +} + +static void SED(void) +{ + statusRegister |= D; +} + +static void NOP(void) +{ +} + +static void Unoff(void) +{ +} + +static void Unoff1(void) +{ +} + +static void Unoff2(void) +{ + programCounter++; +} + +static void Unoff3(void) +{ + programCounter += 2; +} + +static void Hang(void) +{ + programCounter--; +} + +static void executeOpcode(void) +{ + unsigned char opcode = memRead(programCounter++); + + switch (opcode) + { + case 0x00: + Imm(); + BRK(); + break; + case 0x01: + IndZeroX(); + ORA(); + break; + case 0x02: + Hang(); + break; + case 0x03: + Unoff(); + break; + case 0x04: + Unoff2(); + break; + case 0x05: + Zero(); + ORA(); + break; + case 0x06: + Zero(); + ASL(); + break; + case 0x07: + Unoff(); + break; + case 0x08: + Imp(); + PHP(); + break; + case 0x09: + Imm(); + ORA(); + break; + case 0x0a: + Imp(); + ASL_A(); + break; + case 0x0b: + Imm(); + AND(); + break; + case 0x0c: + Unoff3(); + break; + case 0x0d: + Abs(); + ORA(); + break; + case 0x0e: + Abs(); + ASL(); + break; + case 0x0f: + Unoff(); + break; + case 0x10: + Rel(); + BPL(); + break; + case 0x11: + IndZeroY(); + ORA(); + break; + case 0x12: + Hang(); + break; + case 0x13: + Unoff(); + break; + case 0x14: + Unoff2(); + break; + case 0x15: + ZeroX(); + ORA(); + break; + case 0x16: + ZeroX(); + ASL(); + break; + case 0x17: + Unoff(); + break; + case 0x18: + Imp(); + CLC(); + break; + case 0x19: + AbsY(); + ORA(); + break; + case 0x1a: + Unoff1(); + break; + case 0x1b: + Unoff(); + break; + case 0x1c: + Unoff3(); + break; + case 0x1d: + AbsX(); + ORA(); + break; + case 0x1e: + WAbsX(); + ASL(); + break; + case 0x1f: + Unoff(); + break; + case 0x20: + JSR(); + break; + case 0x21: + IndZeroX(); + AND(); + break; + case 0x22: + Hang(); + break; + case 0x23: + Unoff(); + break; + case 0x24: + Zero(); + BIT(); + break; + case 0x25: + Zero(); + AND(); + break; + case 0x26: + Zero(); + ROL(); + break; + case 0x27: + Unoff(); + break; + case 0x28: + Imp(); + PLP(); + break; + case 0x29: + Imm(); + AND(); + break; + case 0x2a: + Imp(); + ROL_A(); + break; + case 0x2b: + Imm(); + AND(); + break; + case 0x2c: + Abs(); + BIT(); + break; + case 0x2d: + Abs(); + AND(); + break; + case 0x2e: + Abs(); + ROL(); + break; + case 0x2f: + Unoff(); + break; + case 0x30: + Rel(); + BMI(); + break; + case 0x31: + IndZeroY(); + AND(); + break; + case 0x32: + Hang(); + break; + case 0x33: + Unoff(); + break; + case 0x34: + Unoff2(); + break; + case 0x35: + ZeroX(); + AND(); + break; + case 0x36: + ZeroX(); + ROL(); + break; + case 0x37: + Unoff(); + break; + case 0x38: + Imp(); + SEC(); + break; + case 0x39: + AbsY(); + AND(); + break; + case 0x3a: + Unoff1(); + break; + case 0x3b: + Unoff(); + break; + case 0x3c: + Unoff3(); + break; + case 0x3d: + AbsX(); + AND(); + break; + case 0x3e: + WAbsX(); + ROL(); + break; + case 0x3f: + Unoff(); + break; + case 0x40: + Imp(); + RTI(); + break; + case 0x41: + IndZeroX(); + EOR(); + break; + case 0x42: + Hang(); + break; + case 0x43: + Unoff(); + break; + case 0x44: + Unoff2(); + break; + case 0x45: + Zero(); + EOR(); + break; + case 0x46: + Zero(); + LSR(); + break; + case 0x47: + Unoff(); + break; + case 0x48: + Imp(); + PHA(); + break; + case 0x49: + Imm(); + EOR(); + break; + case 0x4a: + Imp(); + LSR_A(); + break; + case 0x4b: + Unoff(); + break; + case 0x4c: + Abs(); + JMP(); + break; + case 0x4d: + Abs(); + EOR(); + break; + case 0x4e: + Abs(); + LSR(); + break; + case 0x4f: + Unoff(); + break; + case 0x50: + Rel(); + BVC(); + break; + case 0x51: + IndZeroY(); + EOR(); + break; + case 0x52: + Hang(); + break; + case 0x53: + Unoff(); + break; + case 0x54: + Unoff2(); + break; + case 0x55: + ZeroX(); + EOR(); + break; + case 0x56: + ZeroX(); + LSR(); + break; + case 0x57: + Unoff(); + break; + case 0x58: + Imp(); + CLI(); + break; + case 0x59: + AbsY(); + EOR(); + break; + case 0x5a: + Unoff1(); + break; + case 0x5b: + Unoff(); + break; + case 0x5c: + Unoff3(); + break; + case 0x5d: + AbsX(); + EOR(); + break; + case 0x5e: + WAbsX(); + LSR(); + break; + case 0x5f: + Unoff(); + break; + case 0x60: + Imp(); + RTS(); + break; + case 0x61: + IndZeroX(); + ADC(); + break; + case 0x62: + Hang(); + break; + case 0x63: + Unoff(); + break; + case 0x64: + Unoff2(); + break; + case 0x65: + Zero(); + ADC(); + break; + case 0x66: + Zero(); + ROR(); + break; + case 0x67: + Unoff(); + break; + case 0x68: + Imp(); + PLA(); + break; + case 0x69: + Imm(); + ADC(); + break; + case 0x6a: + Imp(); + ROR_A(); + break; + case 0x6b: + Unoff(); + break; + case 0x6c: + Ind(); + JMP(); + break; + case 0x6d: + Abs(); + ADC(); + break; + case 0x6e: + Abs(); + ROR(); + break; + case 0x6f: + Unoff(); + break; + case 0x70: + Rel(); + BVS(); + break; + case 0x71: + IndZeroY(); + ADC(); + break; + case 0x72: + Hang(); + break; + case 0x73: + Unoff(); + break; + case 0x74: + Unoff2(); + break; + case 0x75: + ZeroX(); + ADC(); + break; + case 0x76: + ZeroX(); + ROR(); + break; + case 0x77: + Unoff(); + break; + case 0x78: + Imp(); + SEI(); + break; + case 0x79: + AbsY(); + ADC(); + break; + case 0x7a: + Unoff1(); + break; + case 0x7b: + Unoff(); + break; + case 0x7c: + Unoff3(); + break; + case 0x7d: + AbsX(); + ADC(); + break; + case 0x7e: + WAbsX(); + ROR(); + break; + case 0x7f: + Unoff(); + break; + case 0x80: + Unoff2(); + break; + case 0x81: + IndZeroX(); + STA(); + break; + case 0x82: + Unoff2(); + break; + case 0x83: + Unoff(); + break; + case 0x84: + Zero(); + STY(); + break; + case 0x85: + Zero(); + STA(); + break; + case 0x86: + Zero(); + STX(); + break; + case 0x87: + Unoff(); + break; + case 0x88: + Imp(); + DEY(); + break; + case 0x89: + Unoff2(); + break; + case 0x8a: + Imp(); + TXA(); + break; + case 0x8b: + Unoff(); + break; + case 0x8c: + Abs(); + STY(); + break; + case 0x8d: + Abs(); + STA(); + break; + case 0x8e: + Abs(); + STX(); + break; + case 0x8f: + Unoff(); + break; + case 0x90: + Rel(); + BCC(); + break; + case 0x91: + WIndZeroY(); + STA(); + break; + case 0x92: + Hang(); + break; + case 0x93: + Unoff(); + break; + case 0x94: + ZeroX(); + STY(); + break; + case 0x95: + ZeroX(); + STA(); + break; + case 0x96: + ZeroY(); + STX(); + break; + case 0x97: + Unoff(); + break; + case 0x98: + Imp(); + TYA(); + break; + case 0x99: + WAbsY(); + STA(); + break; + case 0x9a: + Imp(); + TXS(); + break; + case 0x9b: + Unoff(); + break; + case 0x9c: + Unoff(); + break; + case 0x9d: + WAbsX(); + STA(); + break; + case 0x9e: + Unoff(); + break; + case 0x9f: + Unoff(); + break; + case 0xa0: + Imm(); + LDY(); + break; + case 0xa1: + IndZeroX(); + LDA(); + break; + case 0xa2: + Imm(); + LDX(); + break; + case 0xa3: + Unoff(); + break; + case 0xa4: + Zero(); + LDY(); + break; + case 0xa5: + Zero(); + LDA(); + break; + case 0xa6: + Zero(); + LDX(); + break; + case 0xa7: + Unoff(); + break; + case 0xa8: + Imp(); + TAY(); + break; + case 0xa9: + Imm(); + LDA(); + break; + case 0xaa: + Imp(); + TAX(); + break; + case 0xab: + Unoff(); + break; + case 0xac: + Abs(); + LDY(); + break; + case 0xad: + Abs(); + LDA(); + break; + case 0xae: + Abs(); + LDX(); + break; + case 0xaf: + Unoff(); + break; + case 0xb0: + Rel(); + BCS(); + break; + case 0xb1: + IndZeroY(); + LDA(); + break; + case 0xb2: + Hang(); + break; + case 0xb3: + Unoff(); + break; + case 0xb4: + ZeroX(); + LDY(); + break; + case 0xb5: + ZeroX(); + LDA(); + break; + case 0xb6: + ZeroY(); + LDX(); + break; + case 0xb7: + Unoff(); + break; + case 0xb8: + Imp(); + CLV(); + break; + case 0xb9: + AbsY(); + LDA(); + break; + case 0xba: + Imp(); + TSX(); + break; + case 0xbb: + Unoff(); + break; + case 0xbc: + AbsX(); + LDY(); + break; + case 0xbd: + AbsX(); + LDA(); + break; + case 0xbe: + AbsY(); + LDX(); + break; + case 0xbf: + Unoff(); + break; + case 0xc0: + Imm(); + CPY(); + break; + case 0xc1: + IndZeroX(); + CMP(); + break; + case 0xc2: + Unoff2(); + break; + case 0xc3: + Unoff(); + break; + case 0xc4: + Zero(); + CPY(); + break; + case 0xc5: + Zero(); + CMP(); + break; + case 0xc6: + Zero(); + DEC(); + break; + case 0xc7: + Unoff(); + break; + case 0xc8: + Imp(); + INY(); + break; + case 0xc9: + Imm(); + CMP(); + break; + case 0xca: + Imp(); + DEX(); + break; + case 0xcb: + Unoff(); + break; + case 0xcc: + Abs(); + CPY(); + break; + case 0xcd: + Abs(); + CMP(); + break; + case 0xce: + Abs(); + DEC(); + break; + case 0xcf: + Unoff(); + break; + case 0xd0: + Rel(); + BNE(); + break; + case 0xd1: + IndZeroY(); + CMP(); + break; + case 0xd2: + Hang(); + break; + case 0xd3: + Unoff(); + break; + case 0xd4: + Unoff2(); + break; + case 0xd5: + ZeroX(); + CMP(); + break; + case 0xd6: + ZeroX(); + DEC(); + break; + case 0xd7: + Unoff(); + break; + case 0xd8: + Imp(); + CLD(); + break; + case 0xd9: + AbsY(); + CMP(); + break; + case 0xda: + Unoff1(); + break; + case 0xdb: + Unoff(); + break; + case 0xdc: + Unoff3(); + break; + case 0xdd: + AbsX(); + CMP(); + break; + case 0xde: + WAbsX(); + DEC(); + break; + case 0xdf: + Unoff(); + break; + case 0xe0: + Imm(); + CPX(); + break; + case 0xe1: + IndZeroX(); + SBC(); + break; + case 0xe2: + Unoff2(); + break; + case 0xe3: + Unoff(); + break; + case 0xe4: + Zero(); + CPX(); + break; + case 0xe5: + Zero(); + SBC(); + break; + case 0xe6: + Zero(); + INC(); + break; + case 0xe7: + Unoff(); + break; + case 0xe8: + Imp(); + INX(); + break; + case 0xe9: + Imm(); + SBC(); + break; + case 0xea: + Imp(); + NOP(); + break; + case 0xeb: + Imm(); + SBC(); + break; + case 0xec: + Abs(); + CPX(); + break; + case 0xed: + Abs(); + SBC(); + break; + case 0xee: + Abs(); + INC(); + break; + case 0xef: + Unoff(); + break; + case 0xf0: + Rel(); + BEQ(); + break; + case 0xf1: + IndZeroY(); + SBC(); + break; + case 0xf2: + Hang(); + break; + case 0xf3: + Unoff(); + break; + case 0xf4: + Unoff2(); + break; + case 0xf5: + ZeroX(); + SBC(); + break; + case 0xf6: + ZeroX(); + INC(); + break; + case 0xf7: + Unoff(); + break; + case 0xf8: + Imp(); + SED(); + break; + case 0xf9: + AbsY(); + SBC(); + break; + case 0xfa: + Unoff1(); + break; + case 0xfb: + Unoff(); + break; + case 0xfc: + Unoff3(); + break; + case 0xfd: + AbsX(); + SBC(); + break; + case 0xfe: + WAbsX(); + INC(); + break; + case 0xff: + Unoff(); + break; + } +} + +static int runM6502(void *data) +{ + while (1) + { + synchronize(); + + cycles = 0; + + while (cycles < sync_cycles) + { + if (!(statusRegister & I) && IRQ) + handleIRQ(); + if (NMI) + handleNMI(); + + executeOpcode(); + } + } + + return 0; +} + +void startM6502(void) +{ + struct timeval t; + + if (!thread) + { + gettimeofday(&t, NULL); + interval_start = (long long)(t.tv_usec / 1000 + + t.tv_sec * 1000); + pthread_create(&thread, NULL,(void *)&runM6502, NULL); + } +} + +void stopM6502(void) +{ + if (thread) + { + pthread_cancel(thread); + } +} + +void resetM6502(void) +{ + statusRegister |= I; + stackPointer = 0xFF; + programCounter = memReadAbsolute(0xFFFC); +} + +/* freq Processr clock speed in Hz + * interval Interval of sync between real and ideal time in msec + */ +void setSpeed(int freq, int interval) +{ + /* freq = cycles/1sec, cycles/1msec = freq/1000 */ + sync_cycles = freq / 1000 * interval; + sync_interval = interval; +} + +void setIRQ(int state) +{ + IRQ = state; +} + +void setNMI(void) +{ + NMI = 1; +} diff --git a/src/m6502.h b/src/m6502.h new file mode 100755 index 0000000..5f6c8a2 --- /dev/null +++ b/src/m6502.h @@ -0,0 +1,27 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +void startM6502(void); +void stopM6502(void); +void resetM6502(void); +void setSpeed(int freq, int synchroMillis); +void setIRQ(int state); +void setNMI(void); diff --git a/src/main.c b/src/main.c new file mode 100755 index 0000000..5693aea --- /dev/null +++ b/src/main.c @@ -0,0 +1,63 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include +#include + +#include "m6502.h" +#include "memory.h" +#include "keyboard.h" +#include "screen.h" +#include "msgbuf.h" + +int main() +{ + /* initialize ncurse */ + initscr(); + noecho(); + cbreak(); + attron(A_REVERSE); + init_screen(); + init_msgbuf(); + + /* initialize apple1 screen */ + resetScreen(); + setSpeed(1000000, 50); /* 1M Hz. Sync emulation every 50 msec */ + + /* Load monitor rom */ + if (!loadMonitor()) { + print_msgbuf("Failed loading rom/monitor.rom"); + endwin(); + return 0; + } + resetMemory(); + + /* start processor */ + resetM6502(); + startM6502(); + atexit(stopM6502); + + while (handleInput()); + + /* ending */ + endwin(); + return 0; +} diff --git a/src/makefile b/src/makefile new file mode 100755 index 0000000..eeac56d --- /dev/null +++ b/src/makefile @@ -0,0 +1,36 @@ +# napple1 makefile +# Nobu Hatano +CC = gcc +CFLAGS = -Wall -ansi +THREAD = -lpthread + +# Support Linux and Cygwin +OS = ${shell uname -o} +ifeq ($(OS), Cygwin) + CURSES = -lncurses -I/usr/include/ncurses +else + CURSES = -lncurses +endif + +all: napple1 + +napple1: m6502.o memory.o pia6820.o screen.o keyboard.o main.o msgbuf.o + $(CC) $(CFLAGS) -o ../napple1 m6502.o memory.o pia6820.o screen.o msgbuf.o keyboard.o main.o $(THREAD) $(CURSES) +m6502.o: m6502.c m6502.h pia6820.h memory.h + $(CC) $(CFLAGS) -o m6502.o -c m6502.c $(THREAD) +memory.o: memory.c pia6820.h memory.h pia6820.h screen.h + $(CC) $(CFLAGS) -o memory.o -c memory.c +pia6820.o: pia6820.c pia6820.h screen.h + $(CC) $(CFLAGS) -o pia6820.o -c pia6820.c +screen.o: screen.c + $(CC) $(CFLAGS) -o screen.o -c screen.c $(CURSES) +msgbuf.o: msgbuf.c screen.h memory.h + $(CC) $(CFLAGS) -o msgbuf.o -c msgbuf.c $(CURSES) +keyboard.o: keyboard.c keyboard.h m6502.h pia6820.h memory.h screen.h + $(CC) $(CFLAGS) -o keyboard.o -c keyboard.c +main.o: main.c keyboard.h m6502.h screen.h msgbuf.h memory.h + $(CC) $(CFLAGS) -o main.o -c main.c $(CURSES) +clean: + -rm *.o + -rm ../napple1 + diff --git a/src/memory.c b/src/memory.c new file mode 100755 index 0000000..3484c24 --- /dev/null +++ b/src/memory.c @@ -0,0 +1,248 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +/* + * Memory maap of napple1 + * + * Apple I 8K mode & napple1 64K mode, common usage + * ----------------------------------------------------------------------- + * $0000 Ststem & User Space + * $0200 - $027F Input Buffer used by monitor + * $0FFF + * ----------------------------------------------------------------------- + * $D010 KBD Keyboard input register. b7 is always 1 by hardware. + * Read KBD will automatcically clear KBDCR's b7. + * $D011 KBDCR When key is pressed, b7 is set by hardware. + * $D012 DSP Bit b6..b0 is output character for the terminal. + * Writing to DSP will set b7 by hardware. + * The termianl clear b7 after the character is accepted. + * $D013 DSPCR Unused. + * ----------------------------------------------------------------------- + * $E000 Apple I Integer BASIC + * $E2B3 Re-entry address + * $EFFF + * ----------------------------------------------------------------------- + * $FF00 Monitor + * $FFEF Echo + * $FFFF + * ----------------------------------------------------------------------- + */ +/* Apple I 8K mode memory map + * --------------------------------- + * Start Type + * addr + * --------------------------------- + * $0000 4KB RAM + * $1000 unused + * $D010 Display and Keyboard I/O + * $D014 unused + * $E000 4KB RAM + * $F000 unused + * $FF00 256B ROM^ (Woz Monitor) + * --------------------------------- + * ^ ROM can be written by Load core + */ +/* napple I 32K mode memory map + * --------------------------------- + * Start Type + * addr + * --------------------------------- + * $0000 32K RAM + * $8000 unused + * $D010 Display and Keyboard I/O + * $D014 unused + * $E000 8K ROM^ + * --------------------------------- + * ^ ROM can be written by Load core + */ + +#include +#include +#include + +#include "pia6820.h" +#include "memory.h" +#include "screen.h" +#include "msgbuf.h" + +#define MEMMAX 0xFFFF + +static unsigned char mem[65536]; +static int mode = 8; /* 8 = Apple I 8K mode, 32 = napple1 32K mode */ + +void flipMode(void) +{ + if (mode == 8) + mode = 32; + else + mode = 8; + + /* update message buffer */ + print_msgbuf(""); +} + +int memMode(void) +{ + return mode; +} + +void loadBasic(void) +{ + FILE *fd = fopen("rom/basic.rom", "rb"); + char input[MSG_LEN_MAX +1]; + + if (!fd) { + gets_msgbuf("Failed to open rom/basic.rom: ", input); + return; + } + + gets_msgbuf("Load basic.rom to ram? y/n: ", input); + if (input[0] == 'y') { + size_t s = fread(&mem[0xE000], 1, 4096, fd); + if (s) { + gets_msgbuf("Load completed: ", input); + } else { + gets_msgbuf("Load failed: ", input); + } + } + + fclose(fd); + return; +} + +int loadMonitor(void) +{ + FILE *fd = fopen("rom/monitor.rom", "rb"); + + if (fd) { + fread(&mem[0xFF00], 1, 256, fd); + fclose(fd); + } + else{ + return 0; + } + + return 1; +} + +void resetMemory(void) +{ + if (memMode() > 8) + memset(mem, 0, 0xE000); /* rom is starting from 0xE000 */ + else + memset(mem, 0, 0x10000 - 256); /* rom is within tail 256b */ +} + +unsigned char memRead(unsigned short address) +{ + if (address == 0xD013) + return readDspCr(); + if (address == 0xD012) + return readDsp(); + if (address == 0xD011) + return readKbdCr(); + if (address == 0xD010) + return readKbd(); + + return mem[address]; +} + +void memWrite(unsigned short address, unsigned char value) +{ + if (address < 0x1000) + mem[address] = value; + else if (address < 0x8000 && (memMode() > 8) ) + mem[address] = value; + else if (address == 0xD013) + writeDspCr(value); + else if (address == 0xD012) + writeDsp(value); + else if (address == 0xD011) + writeKbdCr(value); + else if (address == 0xD010) + writeKbd(value); + else if (address >= 0xE000 && address < 0xF000 && memMode() == 8) + mem[address] = value; + else + ; + + return; +} + +void dumpCore(void) +{ + int i; + FILE *fd; + char input[MSG_LEN_MAX +1]; + char corename[5 + MSG_LEN_MAX +1]; /* 'core/' + input string */ + + gets_msgbuf("Dump core. Filename: ", input); + sprintf(corename, "core/%s", input); + + fd = fopen(corename, "w"); + for (i = 0; i <= MEMMAX; i++) + fputc(mem[i], fd); + fclose(fd); + gets_msgbuf("Dump core completed: ", input); +} + +int loadCore(void) +{ + FILE *fd; + char input[MSG_LEN_MAX +1]; + char corename[5 + MSG_LEN_MAX +1]; /* 'core/' + input string */ + size_t s = 0; + unsigned char buf[65536]; + int i; + + gets_msgbuf("Load core. Filename: ", input); + sprintf(corename, "core/%s", input); + + fd = fopen(corename, "r"); + if (fd) { + s = fread(&buf[0], 1, MEMMAX+1, fd); + fclose(fd); + } + if (s) { + gets_msgbuf("Load core completed: ", input); + } else { + gets_msgbuf("Failed to open core file: ", input); + return 0; + } + + /* 0xF000 is unused area of 8K mode or + * ROM area of 32K mode. So, if 0xF000 has a value, + * The mode should better change to 32K mode. + */ + if ((buf[0xF000] != 0) && (memMode() == 8)) { + flipMode(); + } + + if (memMode() == 8) { + for (i = 0; i <= 0x0FFF; i++) mem[i] = buf[i]; + for (i = 0xE000; i <= 0xEFFF; i++) mem[i] = buf[i]; + for (i = 0xFF00; i <= 0xFFFF; i++) mem[i] = buf[i]; + } else { + for (i = 0; i <= 0x7FFF; i++) mem[i] = buf[i]; + for (i = 0xE000; i <= 0xFFFF; i++) mem[i] = buf[i]; + } + return 1; +} diff --git a/src/memory.h b/src/memory.h new file mode 100755 index 0000000..22015ec --- /dev/null +++ b/src/memory.h @@ -0,0 +1,27 @@ +/* Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +void loadBasic(void); +int loadMonitor(void); +void resetMemory(void); +unsigned char memRead(unsigned short address); +void memWrite(unsigned short address, unsigned char value); +void dumpCore(void); +int loadCore(void); +int memMode(void); +void flipMode(void); diff --git a/src/msgbuf.c b/src/msgbuf.c new file mode 100755 index 0000000..dc39dfa --- /dev/null +++ b/src/msgbuf.c @@ -0,0 +1,73 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ +/* + * Message buffer is a 1 line display of napple 1 system. + */ +#include +#include + +#include "screen.h" +#include "msgbuf.h" +#include "memory.h" + +static WINDOW *msgbuf; + +void print_msgbuf(char *s) +{ + char msg[MSG_LEN_MAX + 1]; + + if ((int)strlen(s) < 1) + sprintf(msg, + "Basic Dump Load Reset Hard Quit Mode %2dK", + memMode()); + else + sprintf(msg, + "%-40s", + s); + werase(msgbuf); + wprintw(msgbuf, msg); + wrefresh(msgbuf); +} + +void init_msgbuf(void) +{ + msgbuf = newwin(1, ncol, nrow, 0); + wattron(msgbuf, COLOR_PAIR(1) | A_REVERSE); /* 2 is black on green */ + + print_msgbuf(""); +} + +void gets_msgbuf(char *prompt, char *typed) +{ + werase(msgbuf); + echo(); + nocbreak(); + wprintw(msgbuf, "%s", prompt); + wrefresh(msgbuf); + wgetnstr(msgbuf, typed, MSG_LEN_MAX); + noecho(); + cbreak(); + print_msgbuf(""); + select_screen(); +} + diff --git a/src/msgbuf.h b/src/msgbuf.h new file mode 100755 index 0000000..58a502a --- /dev/null +++ b/src/msgbuf.h @@ -0,0 +1,27 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ +void init_msgbuf(void); +void print_msgbuf(char *string); +void gets_msgbuf(char *prompt, char *typed); + +#define MSG_LEN_MAX 40 diff --git a/src/pia6820.c b/src/pia6820.c new file mode 100755 index 0000000..100fa2c --- /dev/null +++ b/src/pia6820.c @@ -0,0 +1,104 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include "pia6820.h" +#include "screen.h" + +static unsigned char _dspCr = 0, _dsp = 0, _kbdCr = 0, _kbd = 0; +static int kbdInterrups = 0, dspOutput = 0; + +void resetPia6820(void) +{ + kbdInterrups = dspOutput = 0; + _kbdCr = _dspCr = 0; +} + +void setKdbInterrups(int b) +{ + kbdInterrups = b; +} + +int getKbdInterrups(void) +{ + return kbdInterrups; +} + +int getDspOutput(void) +{ + return dspOutput; +} + +void writeDspCr(unsigned char dspCr) +{ + if (!dspOutput && dspCr >= 0x80) + dspOutput = 1; + else + _dspCr = dspCr; +} + +void writeDsp(unsigned char dsp) +{ + if (dsp >= 0x80) + dsp -= 0x80; + + outputDsp(dsp); + _dsp = dsp; +} + +void writeKbdCr(unsigned char kbdCr) +{ + if (!kbdInterrups && kbdCr >= 0x80) + kbdInterrups = 1; + else + _kbdCr = kbdCr; +} + +void writeKbd(unsigned char kbd) +{ + _kbd = kbd; +} + +unsigned char readDspCr(void) +{ + return _dspCr; +} + +unsigned char readDsp(void) +{ + return _dsp; +} + +unsigned char readKbdCr(void) +{ + if (kbdInterrups && _kbdCr >= 0x80) + { + _kbdCr = 0; + + return 0xA7; + } + + return _kbdCr; +} + +unsigned char readKbd(void) +{ + return _kbd; +} diff --git a/src/pia6820.h b/src/pia6820.h new file mode 100755 index 0000000..6d1a9d8 --- /dev/null +++ b/src/pia6820.h @@ -0,0 +1,33 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +void resetPia6820(void); +void setKdbInterrups(int b); +int getKbdInterrups(void); +int getDspOutput(void); +void writeDspCr(unsigned char dspCr); +void writeDsp(unsigned char dsp); +void writeKbdCr(unsigned char kbdCr); +void writeKbd(unsigned char kbd); +unsigned char readDspCr(void); +unsigned char readDsp(void); +unsigned char readKbdCr(void); +unsigned char readKbd(void); diff --git a/src/screen.c b/src/screen.c new file mode 100755 index 0000000..629acbc --- /dev/null +++ b/src/screen.c @@ -0,0 +1,183 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ +/** screen.c + * Screen is a vitrual display of Apple I + */ +#define _XOPEN_SOURCE 500 +#include +#include +#include +#include + +#include "screen.h" + +static unsigned char screenTbl[40 * 24]; +static int indexX, indexY; +static WINDOW *screen; +static long long interval_start; /* interval start time in u sec */ + +char getch_screen(void) +{ + return (char)wgetch(screen); +} + +void init_screen(void) +{ + /* Determine main screen window size. + * To reserve bottom 1 line for the message buffer, + * -1 from $LINES + */ + if ((nrow = (LINES - 1)) > 24 || nrow < 1) + nrow = 24; + if ((ncol = COLS) > 40 || ncol < 1) + ncol = 40; + + /* Create 'screen' window */ + screen = newwin(nrow, ncol, 0, 0); + + /* Set screen window color as Green On Black */ + if (has_colors()) + { + start_color(); + init_pair(1, COLOR_GREEN, COLOR_BLACK); + wattron(screen, COLOR_PAIR(1)); + } +} + +void updateScreen(void) +{ + int i, j; + unsigned char c; + + werase(screen); + + for (j = 0; j < nrow; ++j) + { + for (i = 0; i < ncol; ++i) + { + wmove(screen, j, i); + c = screenTbl[j * ncol + i]; + if (c < '!') + c = ' '; + wprintw(screen, "%c", c); + } + } + + wmove(screen, indexY, indexX); /* put cursor */ + wrefresh(screen); +} + +void resetScreen(void) +{ + indexX = indexY = 0; + memset(screenTbl, 0, nrow * ncol); + updateScreen(); +} + +static void synchronizeOutput(void) +{ + int processed; /* processed real time in u sec */ + int delay; /* delay u sec to be added to real time */ + struct timeval t; + + gettimeofday(&t, NULL); + processed = (int)(t.tv_usec + t.tv_sec * 1000000 + - interval_start); + if (processed < 0) + processed = 0; + + /* Video output refreshes screen by 60 Hz. + * In real time, it takes 1 sec / 60 hz. + * So, 1000000 usec / 60 hz. + */ + delay = 1000000 / 60 - processed; + if (delay < 0) + delay = 0; + usleep((unsigned int)delay); + + gettimeofday(&t, NULL); + interval_start = (long long)(t.tv_usec + t.tv_sec * 1000000); +} + +static void newLine(void) +{ + int i; + + for (i = 0; i < (nrow-1) ; ++i) + memcpy(&screenTbl[i * ncol], + &screenTbl[(i + 1) * ncol], + ncol); + + memset(&screenTbl[ncol * (nrow-1)], 0, ncol); +} + +void outputDsp(unsigned char dsp) +{ + switch (dsp) + { + case 0x5F: + if (indexX == 0) + { + indexY--; + indexX = ncol-1; + } + else + indexX--; + + screenTbl[indexY * ncol + indexX] = 0; + break; + case 0x0A: + case 0x0D: + indexX = 0; + indexY++; + break; + case 0x00: + case 0x7F: + break; + default: + screenTbl[indexY * ncol + indexX] = dsp; + indexX++; + break; + } + + if (indexX == ncol) + { + indexX = 0; + indexY++; + } + if (indexY == nrow) + { + newLine(); + indexY--; + } + + updateScreen(); + + synchronizeOutput(); +} + +void select_screen(void) +{ + touchwin(screen); + wrefresh(screen); +} diff --git a/src/screen.h b/src/screen.h new file mode 100755 index 0000000..88bdbb3 --- /dev/null +++ b/src/screen.h @@ -0,0 +1,29 @@ +/* napple1 ncurses Apple 1 emulator + * Copyright (C) 2008 Nobu Hatano + * + * Pom1 Apple 1 Emulator + * Copyright (C) 2000 Verhille Arnaud + * Copyright (C) 2006 John D. Corrado + * + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +void init_screen(void); +void resetScreen(void); +void outputDsp(unsigned char dsp); +char getch_screen(void); +void select_screen(void); + +int nrow, ncol; +