1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
// ncurses.c
// Implements interface.h
// Provides an in-terminal interface to the emulator.
#include<ncurses.h>
#include"interface.h"
#include"../apple.h"
#include"../cpu/6502.h"
int TermX = 0;
int TermY = 0;
WINDOW *AppleWindow;
const byte* TerminalShiftRegister;
byte* TerminalShiftRegisterPosition;
int TerminalShiftRegisterOffset;
void PrintInfo()
{
mvprintw(2, 43, " acc : %02x", acc);
mvprintw(3, 43, " X : %02x", X );
mvprintw(4, 43, " Y : %02x", Y );
mvprintw(5, 43, " PC : %04x", PC);
mvprintw(6, 43, " S : %02x", S );
mvprintw(7, 43, "Flags : %c%c_%c%c%c%c%c",
getFlag(flag_N) ? 'N':'.' ,
getFlag(flag_V) ? 'V':'.' ,
getFlag(flag_B) ? 'B':'.' ,
getFlag(flag_D) ? 'D':'.' ,
getFlag(flag_I) ? 'I':'.' ,
getFlag(flag_Z) ? 'Z':'.' ,
getFlag(flag_C) ? 'C':'.'
);
mvprintw(2, 65, "Stack");
int count = 3;
for (int i = 0x1ff; i > 0x1e8; i--) {
if (i == (0x1ff-S)) // Indicate the stack pointer!
attron(A_REVERSE);
mvprintw(count, 65, "%x : %x", i, GetMemory(i));
attroff(A_REVERSE);
count++;
}
refresh();
}
void DisplayInit()
{
// ncurses initialization functions.
initscr();
cbreak();
noecho();
curs_set(0);
keypad(stdscr, TRUE);
// Draw decorative border.
attron(A_REVERSE);
move(0, 0);
printw(" ");
for (int i = 1; i <= 24; i++)
{
mvaddch(i, 0, ' ');
mvaddch(i, 41, ' ');
}
mvprintw(25, 0, " ~ ");
mvprintw(26, 0, " Alekseis Apple I ");
mvprintw(27, 0, " ");
attroff(A_REVERSE);
// Create seperate Apple screen window.
AppleWindow = newwin(24, 40, 1, 1);
// @ prompt.
mvwaddch(AppleWindow, TermY, TermX, '@' | A_BLINK);
// Initialize the terminal shift register variables.
TerminalShiftRegister = (byte*)malloc(960);
TerminalShiftRegisterPosition = TerminalShiftRegister;
TerminalShiftRegisterOffset = 0;
refresh();
}
void DisplayClose()
{
free(TerminalShiftRegister);
curs_set(1);
endwin();
}
void DisplayInput(byte n)
{
if (n == BS) {
return;
}
n &= 0b01111111;
// Place character
mvwaddch(AppleWindow, TermY, TermX, ' ');
mvwaddch(AppleWindow, TermY, TermX, n);
// Add character to register
*TerminalShiftRegisterPosition = n;
TerminalShiftRegisterPosition++;
if (TerminalShiftRegisterPosition >= (TerminalShiftRegister + 960))
TerminalShiftRegisterPosition = TerminalShiftRegister;
TermX++;
// If X is past width..
if (TermX >= 40) {
//.. move to start of next line.
TermX = 0;
TermY++;
}
// If Y is past height..
if (TermY >= 24) {
//.. discard the first line..
TerminalShiftRegisterOffset += 40;
//.. verify the register offset..
if (TerminalShiftRegisterOffset >= 960)
TerminalShiftRegisterOffset = TerminalShiftRegister;
//.. and create an offset variable to cycle through memory with.
byte *offset = TerminalShiftRegister + TerminalShiftRegisterOffset;
// Then, for every cell of the screen, fill with the contents of the video memory.
for (int i = 0; i < 23; i++) {
for (int j = 0; j < 40; j++) {
if (offset >= (TerminalShiftRegister + 960))
offset -= TerminalShiftRegister;
mvwaddch(AppleWindow, i, j, *offset );
offset++;
}}
// Set to start of final line, and clear line.
TermY = 23;
TermX = 0;
mvwprintw(AppleWindow, TermY, TermX,
" ");
}
// @ prompt.
mvwaddch(AppleWindow, TermY, TermX, '@' | A_BLINK);
wrefresh(AppleWindow);
}
|
