Apple1-esp/io.cpp
2018-11-12 22:15:16 +00:00

182 lines
4.1 KiB
C++

#include <Stream.h>
#include <stdint.h>
#include <memory.h>
#include <tftdisplay.h>
#include <sdtape.h>
#include <keyboard.h>
#include <timed.h>
#include "pia.h"
#include "io.h"
#include "config.h"
#include "hardware.h"
#define ROWS 24
#define COLS 40
static unsigned r, c;
static char screen[ROWS][COLS];
void io::reset() {
TFTDisplay::begin(TFT_BG, TFT_FG, reverse_landscape);
clear();
_cy += 2;
r = c = 0;
for (int j = 0; j < ROWS; j++)
for (int i = 0; i < COLS; i++)
screen[j][i] = ' ';
_loading = false;
pia::reset();
}
void io::load() {
if (tape.more()) {
_loading = true;
enter(tape.read());
}
}
// ascii map for scan-codes
static const uint8_t scanmap[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // 0x00
0xff, 0xff, 0xff, 0xff, 0xff, 0x09, 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
0xff, 0x5c, 0xff, 0xff, 0xff, 0xff, 0x5f, 0xff, // 0x60
0xff, 0x31, 0xff, 0x34, 0x37, 0xff, 0xff, 0xff, // 0x68
0x30, 0x08, 0x32, 0x35, 0x36, 0x38, 0x1b, 0xff, // 0x70
0xff, 0x2b, 0x33, 0x2d, 0x2a, 0x39, 0xff, 0xff, // 0x78
};
static const uint8_t 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(uint8_t scan) {
set_porta(0);
if (isshift(scan))
_shift = true;
}
void io::enter(uint8_t key) {
set_porta(key + 0x80);
}
void io::up(uint8_t scan) {
if (isshift(scan)) {
_shift = false;
return;
}
enter(_shift? shiftmap[scan]: scanmap[scan]);
}
void io::draw(char ch, int i, int j) {
if (screen[j][i] != ch) {
screen[j][i] = ch;
char c[2] = { ch, 0 };
drawString(c, i*_cx, j*_cy);
}
}
void io::display(uint8_t b) {
char ch = (char)b;
switch(ch) {
case 0x5f:
draw(' ', c, r);
if (c-- == 0) {
r--;
c = COLS-1;
}
break;
case 0x0d:
draw(' ', c, r);
c = 0;
r++;
break;
default:
if (ch >= 0x20 && ch < 0x7f) {
draw(ch, c, r);
if (++c == COLS) {
c = 0;
r++;
}
}
}
if (r == ROWS) {
// scroll
r--;
for (int j = 0; j < (ROWS-1); j++)
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);
}
draw('_', c, r);
}
void io::write_portb(uint8_t b) {
b &= 0x7f;
display(b);
pia::write_portb(b);
}
uint8_t io::read_porta_cr() {
uint8_t b = pia::read_porta_cr();
if (b != 0xa7)
return b;
if (_loading) {
if (tape.more())
enter(tape.read());
else
_loading = false;
}
return b;
}
void io::checkpoint(Stream &s) {
pia::checkpoint(s);
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]);
}
void io::restore(Stream &s) {
pia::restore(s);
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);
}