Raimon Zamora
cbbf39c6cc
- [FIX] no se tornava el bit6 correcte en el port 0xFE (i el teclat "anava mal" segons com el mirares)
288 lines
9.3 KiB
C++
288 lines
9.3 KiB
C++
#include "zx_ula.h"
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#include <SDL2/SDL.h>
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#define AUDIO_BUFFER_SIZE 2048
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namespace zx_ula
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{
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#define KEY_SHIFT 0
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#define KEY_Z 1
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#define KEY_X 2
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#define KEY_C 3
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#define KEY_V 4
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#define KEY_A 5
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#define KEY_S 6
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#define KEY_D 7
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#define KEY_F 8
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#define KEY_G 9
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#define KEY_Q 10
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#define KEY_W 11
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#define KEY_E 12
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#define KEY_R 13
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#define KEY_T 14
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#define KEY_1 15
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#define KEY_2 16
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#define KEY_3 17
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#define KEY_4 18
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#define KEY_5 19
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#define KEY_0 20
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#define KEY_9 21
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#define KEY_8 22
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#define KEY_7 23
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#define KEY_6 24
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#define KEY_P 25
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#define KEY_O 26
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#define KEY_I 27
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#define KEY_U 28
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#define KEY_Y 29
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#define KEY_RETURN 30
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#define KEY_L 31
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#define KEY_K 32
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#define KEY_J 33
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#define KEY_H 34
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#define KEY_SPACE 35
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#define KEY_SYMBOL 36
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#define KEY_M 37
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#define KEY_N 38
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#define KEY_B 39
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uint8_t zx_keyboard[40];
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static uint8_t border_color = 0;
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static uint8_t ear = 0;
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static uint8_t mic = 0;
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// this variable keeps track of the last "1" written to the sound buffer, so when streaming it in the audio callback, if there
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// are only zeros remaining in the buffer, we just discard it. It's a poor man's method of keeping the buffer size in control.
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// This is useless when there are music, sounds, tape loading, etc... as 1's and 0's keep alternating
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static uint16_t last_1 = 0;
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void update_zx_keyboard()
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{
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const uint8_t *keys = SDL_GetKeyboardState(NULL);
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// Normal keypresses
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zx_keyboard[KEY_SHIFT] = keys[SDL_SCANCODE_LSHIFT] | keys[SDL_SCANCODE_RSHIFT];
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zx_keyboard[KEY_Z] = keys[SDL_SCANCODE_Z];
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zx_keyboard[KEY_X] = keys[SDL_SCANCODE_X];
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zx_keyboard[KEY_C] = keys[SDL_SCANCODE_C];
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zx_keyboard[KEY_V] = keys[SDL_SCANCODE_V];
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zx_keyboard[KEY_A] = keys[SDL_SCANCODE_A];
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zx_keyboard[KEY_S] = keys[SDL_SCANCODE_S];
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zx_keyboard[KEY_D] = keys[SDL_SCANCODE_D];
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zx_keyboard[KEY_F] = keys[SDL_SCANCODE_F];
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zx_keyboard[KEY_G] = keys[SDL_SCANCODE_G];
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zx_keyboard[KEY_Q] = keys[SDL_SCANCODE_Q];
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zx_keyboard[KEY_W] = keys[SDL_SCANCODE_W];
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zx_keyboard[KEY_E] = keys[SDL_SCANCODE_E];
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zx_keyboard[KEY_R] = keys[SDL_SCANCODE_R];
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zx_keyboard[KEY_T] = keys[SDL_SCANCODE_T];
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zx_keyboard[KEY_1] = keys[SDL_SCANCODE_1] | keys[SDL_SCANCODE_KP_1];
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zx_keyboard[KEY_2] = keys[SDL_SCANCODE_2] | keys[SDL_SCANCODE_KP_2];
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zx_keyboard[KEY_3] = keys[SDL_SCANCODE_3] | keys[SDL_SCANCODE_KP_3];
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zx_keyboard[KEY_4] = keys[SDL_SCANCODE_4] | keys[SDL_SCANCODE_KP_4];
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zx_keyboard[KEY_5] = keys[SDL_SCANCODE_5] | keys[SDL_SCANCODE_KP_5];
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zx_keyboard[KEY_0] = keys[SDL_SCANCODE_0] | keys[SDL_SCANCODE_KP_0];
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zx_keyboard[KEY_9] = keys[SDL_SCANCODE_9] | keys[SDL_SCANCODE_KP_9];
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zx_keyboard[KEY_8] = keys[SDL_SCANCODE_8] | keys[SDL_SCANCODE_KP_8];
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zx_keyboard[KEY_7] = keys[SDL_SCANCODE_7] | keys[SDL_SCANCODE_KP_7];
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zx_keyboard[KEY_6] = keys[SDL_SCANCODE_6] | keys[SDL_SCANCODE_KP_6];
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zx_keyboard[KEY_P] = keys[SDL_SCANCODE_P];
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zx_keyboard[KEY_O] = keys[SDL_SCANCODE_O];
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zx_keyboard[KEY_I] = keys[SDL_SCANCODE_I];
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zx_keyboard[KEY_U] = keys[SDL_SCANCODE_U];
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zx_keyboard[KEY_Y] = keys[SDL_SCANCODE_Y];
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zx_keyboard[KEY_RETURN] = keys[SDL_SCANCODE_KP_ENTER] | keys[SDL_SCANCODE_RETURN];
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zx_keyboard[KEY_L] = keys[SDL_SCANCODE_L];
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zx_keyboard[KEY_K] = keys[SDL_SCANCODE_K];
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zx_keyboard[KEY_J] = keys[SDL_SCANCODE_J];
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zx_keyboard[KEY_H] = keys[SDL_SCANCODE_H];
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zx_keyboard[KEY_SPACE] = keys[SDL_SCANCODE_SPACE];
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zx_keyboard[KEY_SYMBOL] = keys[SDL_SCANCODE_LCTRL] | keys[SDL_SCANCODE_RCTRL];
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zx_keyboard[KEY_M] = keys[SDL_SCANCODE_M];
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zx_keyboard[KEY_N] = keys[SDL_SCANCODE_N];
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zx_keyboard[KEY_B] = keys[SDL_SCANCODE_B];
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// Keys in a normal keyboard that ara combinations in the zx one
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if (keys[SDL_SCANCODE_BACKSPACE]) zx_keyboard[KEY_SHIFT] = zx_keyboard[KEY_0] = 1;
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if (keys[SDL_SCANCODE_PERIOD]) zx_keyboard[KEY_SYMBOL] = zx_keyboard[KEY_M] = 1;
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}
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int port_in(int port)
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{
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const uint8_t h_addr = (port>>8);
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uint8_t result = ear ? 0xff : 0xbf;
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update_zx_keyboard();
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if (!(h_addr & ~0xfe))
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{
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result &= ~(
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zx_keyboard[KEY_SHIFT]*0x01 +
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zx_keyboard[KEY_Z]*0x02 +
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zx_keyboard[KEY_X]*0x04 +
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zx_keyboard[KEY_C]*0x08 +
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zx_keyboard[KEY_V]*0x10 );
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}
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if (!(h_addr & ~0xfd))
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{
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result &= ~(
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zx_keyboard[KEY_A]*0x01 +
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zx_keyboard[KEY_S]*0x02 +
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zx_keyboard[KEY_D]*0x04 +
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zx_keyboard[KEY_F]*0x08 +
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zx_keyboard[KEY_G]*0x10 );
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}
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if (!(h_addr & ~0xfb))
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{
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result &= ~(
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zx_keyboard[KEY_Q]*0x01 +
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zx_keyboard[KEY_W]*0x02 +
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zx_keyboard[KEY_E]*0x04 +
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zx_keyboard[KEY_R]*0x08 +
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zx_keyboard[KEY_T]*0x10 );
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}
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if (!(h_addr & ~0xf7))
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{
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result &= ~(
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zx_keyboard[KEY_1]*0x01 +
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zx_keyboard[KEY_2]*0x02 +
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zx_keyboard[KEY_3]*0x04 +
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zx_keyboard[KEY_4]*0x08 +
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zx_keyboard[KEY_5]*0x10 );
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}
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if (!(h_addr & ~0xef))
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{
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result &= ~(
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zx_keyboard[KEY_0]*0x01 +
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zx_keyboard[KEY_9]*0x02 +
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zx_keyboard[KEY_8]*0x04 +
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zx_keyboard[KEY_7]*0x08 +
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zx_keyboard[KEY_6]*0x10 );
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}
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if (!(h_addr & ~0xdf))
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{
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result &= ~(
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zx_keyboard[KEY_P]*0x01 +
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zx_keyboard[KEY_O]*0x02 +
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zx_keyboard[KEY_I]*0x04 +
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zx_keyboard[KEY_U]*0x08 +
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zx_keyboard[KEY_Y]*0x10 );
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}
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if (!(h_addr & ~0xbf))
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{
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result &= ~(
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zx_keyboard[KEY_RETURN]*0x01 +
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zx_keyboard[KEY_L]*0x02 +
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zx_keyboard[KEY_K]*0x04 +
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zx_keyboard[KEY_J]*0x08 +
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zx_keyboard[KEY_H]*0x10 );
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}
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if (!(h_addr & ~0x7f))
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{
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result &= ~(
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zx_keyboard[KEY_SPACE]*0x01 +
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zx_keyboard[KEY_SYMBOL]*0x02 +
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zx_keyboard[KEY_M]*0x04 +
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zx_keyboard[KEY_N]*0x08 +
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zx_keyboard[KEY_B]*0x10 );
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}
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return result;
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}
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void port_out(int port, int val)
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{
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border_color = val & 0x7;
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mic = (val&0x08)?0:1;
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ear = val&0x10?1:0;
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//printf("EAR:%i MIC:%i\n", ear, mic);
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}
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uint8_t get_border_color() { return border_color; }
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uint8_t get_ear() { return ear; }
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void set_ear(const uint8_t val) { ear = val; }
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SDL_AudioDeviceID sdlAudioDevice;
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uint8_t sound_buffer[AUDIO_BUFFER_SIZE];
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uint16_t sound_pos=0;
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uint16_t sound_start=0;
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uint16_t t_sound=0;
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void audioCallback(void * userdata, uint8_t * stream, int len)
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{
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//const uint16_t top = sound_pos < len ? sound_pos : len;
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//if (top<len) printf("top: %i, len: %i, pos: %i\n", top, len, sound_pos);
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//memcpy(stream, sound_buffer, top);
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for (int i=0;i<len;++i)
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{
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stream[i] = sound_buffer[(sound_start++)&(AUDIO_BUFFER_SIZE-1)];
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}
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//if (top<len) memchr(&stream[top], sound_buffer[top-1], len-top);
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/*if (top<sound_pos)
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{
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if (last_1>top)
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{
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memcpy(sound_buffer, &sound_buffer[top], sound_pos-top);
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sound_pos=sound_pos-top;
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last_1=last_1-top;
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}
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else
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{
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sound_pos=last_1=0;
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}
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}
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else
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{
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sound_pos=last_1=0;
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}*/
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}
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void sound_init()
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{
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SDL_AudioSpec audioSpec{11025, AUDIO_U8, 1, 0, AUDIO_BUFFER_SIZE>>2, 0, 0, &audioCallback, NULL};
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sdlAudioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, NULL, 0);
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sound_enable();
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}
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void sound_enable()
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{
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SDL_PauseAudioDevice(sdlAudioDevice, 0);
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}
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void sound_disable()
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{
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SDL_PauseAudioDevice(sdlAudioDevice, 1);
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}
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void sound_update(const uint8_t dt)
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{
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t_sound += dt;
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if (t_sound>=317) {
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t_sound-=317;
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//sound_pos = (sound_pos+1) & 0x3ff;
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//sound_buffer[sound_pos] = ear*128;
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//if (sound_pos>=AUDIO_BUFFER_SIZE) sound_pos = last_1 = 0;
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sound_buffer[(sound_pos++)&(AUDIO_BUFFER_SIZE-1)] = ear*128;
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//if (ear) last_1 = sound_pos;
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}
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}
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} |