Apple1-esp/io.cpp

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#include <UTFT.h>
#include <memory.h>
#include <utftdisplay.h>
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#include <sdtape.h>
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#include <keyboard.h>
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#include <timed.h>
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#include "io.h"
#include "config.h"
#include "hardware.h"
static byte dsp_cr, dsp, kbd_cr, kbd;
static unsigned kbd_int, dsp_out;
#define ROWS 24
#define COLS 40
static unsigned r, c;
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static char screen[ROWS][COLS];
#include "TinyFont.h"
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void io::reset() {
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UTFTDisplay::begin(TFT_BG, TFT_FG, (uint8_t *)TinyFont);
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clear();
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_cy += 2;
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r = c = 0;
for (int j = 0; j < ROWS; j++)
for (int i = 0; i < COLS; i++)
screen[j][i] = ' ';
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_loading = false;
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// PIA state
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dsp_cr = kbd_cr = 0;
kbd_int = dsp_out = 0;
}
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void io::load() {
if (tape.more()) {
_loading = true;
enter(tape.read());
}
}
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// ascii map for scan-codes
static const byte scanmap[] = {
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x00
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x60, 0xff, // 0x08
0xff, 0xff, 0xff, 0xff, 0xff, 0x51, 0x31, 0xff, // 0x10
0xff, 0xff, 0x5a, 0x53, 0x41, 0x57, 0x32, 0xff, // 0x18
0xff, 0x43, 0x58, 0x44, 0x45, 0x34, 0x33, 0xff, // 0x20
0xff, 0x20, 0x56, 0x46, 0x54, 0x52, 0x35, 0xff, // 0x28
0xff, 0x4e, 0x42, 0x48, 0x47, 0x59, 0x36, 0xff, // 0x30
0xff, 0xff, 0x4d, 0x4a, 0x55, 0x37, 0x38, 0xff, // 0x38
0xff, 0x2c, 0x4b, 0x49, 0x4f, 0x30, 0x39, 0xff, // 0x40
0xff, 0x2e, 0x2f, 0x4c, 0x3b, 0x50, 0x2d, 0xff, // 0x48
0xff, 0xff, 0x27, 0xff, 0x5b, 0x3d, 0xff, 0xff, // 0x50
0xff, 0xff, 0x0d, 0x5d, 0xff, 0x23, 0xff, 0xff, // 0x58
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0xff, 0x5c, 0xff, 0xff, 0xff, 0xff, 0x5f, 0xff, // 0x60
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0xff, 0x31, 0xff, 0x34, 0x37, 0xff, 0xff, 0xff, // 0x68
0x30, 0xff, 0x32, 0x35, 0x36, 0x38, 0xff, 0xff, // 0x70
0xff, 0x2b, 0x33, 0x2d, 0x2a, 0x39, 0xff, 0xff, // 0x78
};
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static const byte shiftmap[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x00
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x08
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x21, 0xff, // 0x10
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x22, 0xff, // 0x18
0xff, 0xff, 0xff, 0xff, 0xff, 0x24, 0x23, 0xff, // 0x20
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x25, 0xff, // 0x28
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x5e, 0xff, // 0x30
0xff, 0xff, 0xff, 0xff, 0xff, 0x26, 0x2a, 0xff, // 0x38
0xff, 0x3c, 0xff, 0xff, 0xff, 0x29, 0x28, 0xff, // 0x40
0xff, 0x3e, 0x3f, 0xff, 0x3a, 0xff, 0x5f, 0xff, // 0x48
0xff, 0xff, 0x40, 0xff, 0x7b, 0x2b, 0xff, 0xff, // 0x50
0xff, 0xff, 0xff, 0x7d, 0xff, 0x7e, 0xff, 0xff, // 0x58
0xff, 0x7c, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x60
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x68
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x70
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x78
};
void io::down(byte scan) {
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kbd = 0;
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if (isshift(scan))
_shift = true;
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}
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void io::enter(byte key) {
kbd = key + 0x80;
kbd_cr = 0xa7;
}
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void io::up(byte scan) {
if (isshift(scan)) {
_shift = false;
return;
}
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enter(_shift? shiftmap[scan]: scanmap[scan]);
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}
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void io::draw(char ch, int i, int j) {
if (screen[j][i] != ch) {
screen[j][i] = ch;
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char c[2] = { ch, 0 };
utft.print(c, i*_cx, j*_cy);
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}
}
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void io::display(byte b) {
char ch = (char)b;
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switch(ch) {
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case 0x5f:
draw(' ', c, r);
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if (c-- == 0) {
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r--;
c = COLS-1;
}
break;
case 0x0d:
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draw(' ', c, r);
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c = 0;
r++;
break;
default:
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if (ch >= 0x20 && ch < 0x7f) {
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draw(ch, c, r);
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if (++c == COLS) {
c = 0;
r++;
}
}
}
if (r == ROWS) {
// scroll
r--;
for (int j = 0; j < (ROWS-1); j++)
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for (int i = 0; i < COLS; i++)
draw(screen[j+1][i], i, j);
for (int i = 0; i < COLS; i++)
draw(' ', i, ROWS-1);
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}
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draw('_', c, r);
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}
void io::operator=(byte b) {
Serial.print(">");
Serial.print(_acc, 16);
Serial.print(" ");
Serial.println(b, 16);
switch(_acc % 4) {
case 0:
kbd = b;
break;
case 1:
if (!kbd_int && b >= 0x80)
kbd_int = 1;
else
kbd_cr = b;
break;
case 2:
if (b >= 0x80)
b -= 0x80;
display(b);
dsp = b;
break;
case 3:
if (!dsp_out && dsp_cr >= 0x80)
dsp_out = 1;
else
dsp_cr = b;
break;
}
}
io::operator byte() {
switch (_acc % 4) {
case 0:
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/*
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Serial.print("<");
Serial.print(_acc, 16);
Serial.print(" ");
Serial.println(kbd, 16);
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*/
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return kbd;
case 1:
if (kbd_int && kbd_cr >= 0x80) {
kbd_cr = 0;
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/*
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Serial.print("<");
Serial.print(_acc, 16);
Serial.print(" ");
Serial.println(0xa7, 16);
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*/
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if (_loading) {
if (tape.more())
enter(tape.read());
else
_loading = false;
}
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return 0xa7;
}
//Serial.println(kbd_cr, 16);
return kbd_cr;
case 2:
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/*
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Serial.print("<");
Serial.print(_acc, 16);
Serial.print(" ");
Serial.println(dsp, 16);
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*/
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return dsp;
case 3:
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/*
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Serial.print("<");
Serial.print(_acc, 16);
Serial.print(" ");
Serial.println(dsp_cr, 16);
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*/
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return dsp_cr;
}
return 0;
}
void io::checkpoint(Stream &s) {
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s.write(dsp_cr);
s.write(dsp);
s.write(kbd_cr);
s.write(kbd);
s.write(kbd_int);
s.write(dsp_out);
s.write(r);
s.write(c);
for (int j = 0; j < ROWS; j++)
for (int i = 0; i < COLS; i++)
s.write(screen[j][i]);
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}
void io::restore(Stream &s) {
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dsp_cr = s.read();
dsp = s.read();
kbd_cr = s.read();
kbd = s.read();
kbd_int = s.read();
dsp_out = s.read();
r = s.read();
c = s.read();
for (int j = 0; j < ROWS; j++)
for (int i = 0; i < COLS; i++) {
char c = s.read();
screen[j][i] = c;
draw(c, i, j);
}
draw('_', c, r);
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}