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#include "integer.h"
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#include "regs.h"
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#include "pause.h"
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#include "printf.h"
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#include "joystick.h"
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#include "simpledir.h"
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#include "simplefile.h"
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#include "fileselector.h"
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#include "atari_drive_emulator.h"
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#include "spi.h"
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#include "mmc.h"
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// FUNCTIONS in here
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// i) pff init - NOT USED EVERYWHERE
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// ii) file selector - kind of crap, no fine scrolling - NOT USED EVERYWHERE
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// iii) cold reset atari (clears base ram...)
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// iv) start atari (begins paused)
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// v) freeze/resume atari - NOT USED EVERYWHERE!
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// vi) menu for various options - NOT USED EVERYWHERE!
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// vii) pause - TODO - base this on pokey clock...
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// standard ZPU IN/OUT use...
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// OUT1 - 6502 settings (pause,reset,speed)
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// pause_n: bit 0
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// reset_n: bit 1
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// turbo: bit 2-4: meaning... 0=1.79Mhz,1=3.58MHz,2=7.16MHz,3=14.32MHz,4=28.64MHz,5=57.28MHz,etc.
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// ram_select: bit 5-7:
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// RAM_SELECT : in std_logic_vector(2 downto 0); -- 64K,128K,320KB Compy, 320KB Rambo, 576K Compy, 576K Rambo, 1088K, 4MB
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// rom_select: bit 8-13:
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// ROM_SELECT : in std_logic_vector(5 downto 0); -- 16KB ROM Bank
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#define BIT_REG(op,mask,shift,name,reg) \
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int get_ ## name() \
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{ \
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int val = *reg; \
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return op((val>>shift)&mask); \
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} \
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void set_ ## name(int param) \
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{ \
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int val = *reg; \
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\
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val = (val&~(mask<<shift)); \
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val |= op(param)<<shift; \
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\
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*reg = val; \
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}
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#define BIT_REG_RO(op,mask,shift,name,reg) \
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int get_ ## name() \
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{ \
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int val = *reg; \
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return op((val>>shift)&mask); \
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}
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BIT_REG(,0x1,0,pause_6502,zpu_out1)
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BIT_REG(,0x1,1,reset_6502,zpu_out1)
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BIT_REG(,0x3f,2,turbo_6502,zpu_out1)
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BIT_REG(,0x7,8,ram_select,zpu_out1)
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BIT_REG(,0x3f,11,rom_select,zpu_out1)
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BIT_REG_RO(,0x1,4,hotkey_softboot,zpu_in1)
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BIT_REG_RO(,0x1,5,hotkey_coldboot,zpu_in1)
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BIT_REG_RO(,0x1,6,hotkey_fileselect,zpu_in1)
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BIT_REG_RO(,0x1,7,hotkey_settings,zpu_in1)
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void
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wait_us(int unsigned num)
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{
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// pause counter runs at pokey frequency - should be 1.79MHz
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int unsigned cycles = (num*230)>>7;
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*zpu_pause = cycles;
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}
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void memset8(void * address, int value, int length)
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{
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char * mem = address;
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while (length--)
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*mem++=value;
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}
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void memset32(void * address, int value, int length)
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{
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int * mem = address;
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while (length--)
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*mem++=value;
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}
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void clear_64k_ram()
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{
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memset8((void *)0x200000, 0, 65536); // SRAM, if present (TODO)
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memset32((void *)0x800000, 0, 16384);
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}
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void
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reboot(int cold)
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{
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set_reset_6502(1);
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if (cold)
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{
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clear_64k_ram();
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}
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set_reset_6502(0);
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set_pause_6502(0);
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}
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unsigned char toatarichar(int val)
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{
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int inv = val>=128;
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if (inv)
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{
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val-=128;
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}
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if (val>='A' && val<='Z')
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{
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val+=-'A'+33;
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}
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else if (val>='a' && val<='z')
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{
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val+=-'a'+33+64;
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}
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else if (val>='0' && val<='9')
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{
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val+=-'0'+16;
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}
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else if (val>=32 && val<=47)
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{
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val+=-32;
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}
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else
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{
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val = 0;
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}
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if (inv)
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{
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val+=128;
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}
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return val;
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}
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int debug_pos;
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int debug_adjust;
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unsigned char volatile * baseaddr;
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void clearscreen()
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{
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unsigned volatile char * screen;
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for (screen=(unsigned volatile char *)40000+atari_regbase; screen!=(unsigned volatile char *)(atari_regbase+40000+1024); ++screen)
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*screen = 0x00;
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}
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void char_out ( void* p, char c)
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{
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unsigned char val = toatarichar(c);
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if (debug_pos>=0)
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{
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*(baseaddr+debug_pos) = val|debug_adjust;
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++debug_pos;
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}
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}
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// Memory usage...
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// 0x410000-0x41FFFF (0xc10000 in zpu space) = directory cache - 64k
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// 0x420000-0x43FFFF (0xc20000 in zpu space) = freeze backup
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struct SimpleFile * files[5];
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void loadrom(char const * path, int size, void * ram_address)
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{
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ram_address += 0x800000;
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if (SimpleFile_OK == file_open_name(path, files[4]))
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{
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int read = 0;
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file_read(files[4], ram_address, size, &read);
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}
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}
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int main(void)
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{
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spiInit();
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set_spi_clock_freq();
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char buffer[512];
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while (1)
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{
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mmcReadLoop();
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wait_us(500);
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spiReceiveBlock(&buffer[0],512);
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wait_us(500);
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}
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int i;
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for (i=0; i!=5; ++i)
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{
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files[i] = (struct SimpleFile *)alloca(file_struct_size());
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file_init(files[i]);
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}
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freeze_init((void*)0xc20000); // 128k
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debug_pos = -1;
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debug_adjust = 0;
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baseaddr = (unsigned char volatile *)(40000 + atari_regbase);
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set_reset_6502(1);
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set_turbo_6502(1);
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set_rom_select(1);
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init_printf(0, char_out);
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// TODO...
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if (SimpleFile_OK == dir_init((void *)0xc10000, 65536))
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{
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// printf("DIR init ok\n");
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init_drive_emulator();
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loadrom("xlorig.rom",0x4000, (void *)0x704000);
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loadrom("xlhias.rom",0x4000, (void *)0x708000);
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loadrom("ultimon.rom",0x4000, (void *)0x70c000);
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loadrom("osbhias.rom",0x4000, (void *)0x710000);
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loadrom("osborig.rom",0x2800, (void *)0x715800);
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loadrom("osaorig.rom",0x2800, (void *)0x719800);
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loadrom("ataribas.rom",0x2000,(void *)0x700000);
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//ROM = xlorig.rom,0x4000, (void *)0x704000
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//ROM = xlhias.rom,0x4000, (void *)0x708000
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//ROM = ultimon.rom,0x4000, (void *)0x70c000
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//ROM = osbhias.rom,0x4000, (void *)0x710000
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//ROM = osborig.rom,0x2800, (void *)0x715800
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//ROM = osaorig.rom,0x2800, (void *)0x719800
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//
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//ROM = ataribas.rom,0x2000,(void *)0x700000
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//--SDRAM_BASIC_ROM_ADDR <= "111"&"000000" &"00000000000000";
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//--SDRAM_OS_ROM_ADDR <= "111"&rom_select &"00000000000000";
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reboot(1);
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run_drive_emulator();
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}
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else
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{
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//printf("DIR init failed\n");
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}
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reboot(1);
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for (;;) actions();
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}
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// struct SimpleFile * file = alloca(file_struct_size());
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// printf("Opening file\n");
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// if (SimpleFile_OK == file_open_name("GUNPOWDR.ATR",file))
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// {
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// printf("FILE open ok\n");
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//
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// set_drive_status(0,file);
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//
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// }
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// else
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// {
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// printf("FILE open failed\n");
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// }
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char const * get_ram()
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{
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switch(get_ram_select())
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{
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case 0:
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return "64K";
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case 1:
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return "128K";
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case 2:
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return "320K(Compy)";
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case 3:
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return "320K(Rambo)";
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case 4:
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return "576K(Compy)";
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case 5:
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return "576K(Rambo)";
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case 6:
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return "1MB";
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case 7:
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return "4MB";
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}
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}
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int settings()
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{
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struct joystick_status joy;
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joy.x_ = joy.y_ = joy.fire_ = 0;
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int row = 0;
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int done = 0;
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for (;!done;)
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{
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// Render
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clearscreen();
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debug_pos = 0;
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debug_adjust = 0;
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printf("Se");
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debug_adjust = 128;
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printf("ttings");
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debug_pos = 80;
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debug_adjust = row==0 ? 128 : 0;
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printf("Turbo:%dx", get_turbo_6502());
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debug_pos = 120;
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debug_adjust = row==1 ? 128 : 0;
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printf("Ram:%s", get_ram());
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debug_pos = 160;
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debug_adjust = row==2 ? 128 : 0;
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printf("Rom bank:%d", get_rom_select());
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debug_pos = 240;
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int i;
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for (i=1;i!=5;++i)
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{
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int temp = debug_pos;
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debug_adjust = row==i+2 ? 128 : 0;
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char buffer[20];
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describe_disk(i-1,&buffer[0]);
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printf("Drive %d:%s %s", i, file_name(files[i-1]), &buffer[0]);
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debug_pos = temp+40;
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}
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debug_pos = 400;
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debug_adjust = row==7 ? 128 : 0;
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printf("Cartridge 8k simple");
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debug_pos = 480;
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debug_adjust = row==8 ? 128 : 0;
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printf("Exit");
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// Slow it down a bit
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wait_us(100000);
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// move
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joystick_wait(&joy,WAIT_QUIET);
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joystick_wait(&joy,WAIT_EITHER);
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row+=joy.y_;
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if (row<0) row = 0;
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if (row>8) row = 8;
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switch (row)
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{
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case 0:
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{
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int turbo = get_turbo_6502();
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if (joy.x_==1) turbo<<=1;
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if (joy.x_==-1) turbo>>=1;
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if (turbo>16) turbo = 16;
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if (turbo<1) turbo = 1;
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set_turbo_6502(turbo);
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}
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break;
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case 1:
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{
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int ram_select = get_ram_select();
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ram_select+=joy.x_;
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if (ram_select<0) ram_select = 0;
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if (ram_select>7) ram_select = 7;
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set_ram_select(ram_select);
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}
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break;
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case 2:
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{
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int rom_select = get_rom_select();
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rom_select+=joy.x_;
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if (rom_select<1) rom_select = 1;
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if (rom_select>6) rom_select = 6; // TODO
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set_rom_select(rom_select);
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}
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break;
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case 3:
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case 4:
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case 5:
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case 6:
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{
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if (joy.x_>0)
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{
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// Choose new disk
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filter = filter_disks;
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file_selector(files[row-3]);
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set_drive_status(row-3,files[row-3]);
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}
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else if(joy.x_<0)
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{
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// Remove disk
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file_init(files[row-3]);
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set_drive_status(row-3,0);
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}
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else if (joy.fire_)
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{
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struct SimpleFile * temp;
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temp = files[0];
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files[0] = files[row-3];
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files[row-3] = temp;
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set_drive_status(row-3,temp);
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set_drive_status(0,files[0]);
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}
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}
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break;
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case 7:
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{
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if (joy.fire_)
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{
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filter = filter_roms;
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file_selector(files[4]);
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loadrom(file_name(files[4]),0x2000,(void *)0x700000);
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return 1;
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}
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}
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break;
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case 8:
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if (joy.fire_)
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{
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done = 1;
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}
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break;
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}
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}
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return 0;
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}
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void actions()
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{
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// Show some activity!
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//*atari_colbk = *atari_random;
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// Hot keys
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if (get_hotkey_softboot())
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{
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reboot(0);
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}
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else if (get_hotkey_coldboot())
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{
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reboot(1);
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}
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else if (get_hotkey_settings())
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{
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set_pause_6502(1);
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freeze();
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debug_pos = 0;
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int do_reboot = settings();
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debug_pos = -1;
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restore();
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if (do_reboot)
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reboot(1);
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else
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set_pause_6502(0);
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}
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else if (get_hotkey_fileselect())
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{
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set_pause_6502(1);
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freeze();
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filter = filter_disks;
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file_selector(files[0]);
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debug_pos = -1;
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restore();
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set_drive_status(0,files[0]);
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reboot(1);
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}
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}
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