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OS8_ESP_SD_VC8_VM.ino
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OS8_ESP_SD_VC8_VM.ino
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#include <gfxfont.h>
#include <Adafruit_SPITFT_Macros.h>
#include <Adafruit_SPITFT.h>
#include <Adafruit_GrayOLED.h>
#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include <ESP.h>
#include <Arduino.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <Adafruit_TinyUSB.h>
#include "ESPTelnetStream.h"
#include "Adafruit_GFX.h"
//#include "WROVER_KIT_LCD.h"
#define LGFX_ESP_WROVER_KIT
#define LGFX_AUTODETECT
#include <LovyanGFX.hpp>
#include <LGFX_AUTODETECT.hpp>
#define SCK 14
#define MISO 2
#define MOSI 15
#define CS 13
#define NUM_LEDS 1
#define DATA_PIN 2
#define R_LED 0u
#define G_LED 2u
#define B_LED 4u
SPIClass spi = SPIClass(HSPI);
LGFX tft;
extern void TStart();
extern void Tloop();
extern ESPTelnetStream telnet;
extern void TFTsetup(void* pvParameters);
extern uint16_t* bmp;
extern uint8_t* bitmap;
int xmain(int argc, char *args[]);
//char *argl[]={"nano8","focal.bin","200"};
int ctr = 0;
char bfr[256];
uint8_t *p;
File df32;
short rkdn, rkcmd, rkca, rkwc;
int rkda;
File rk05;
unsigned int bcnt;
unsigned long systime, nowtime, cntr;
int clken, clkcnt, clkfl, ndx;
#include <sys/time.h>
time_t time_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (time_t)tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
void listDir(fs::FS &fs, const char *dirname, uint8_t levels) {
Serial.printf("Listing directory: %s\r\n", dirname);
File root = fs.open(dirname);
if (!root) {
Serial.println("- failed to open directory");
return;
}
if (!root.isDirectory()) {
Serial.println(" - not a directory");
return;
}
File file = root.openNextFile();
while (file) {
if (file.isDirectory()) {
Serial.print(" DIR : ");
Serial.println(file.name());
if (levels) {
listDir(fs, file.name(), levels - 1);
}
} else {
Serial.print(" FILE: ");
Serial.print(file.name());
Serial.print("\tSIZE: ");
Serial.println(file.size());
}
file = root.openNextFile();
}
}
/*
// Callback invoked when received READ10 command.
// Copy disk's data to buffer (up to bufsize) and
// return number of copied bytes (must be multiple of block size)
int32_t msc_read_cb(uint32_t lba, void *buffer, uint32_t bufsize) {
uint8_t const *addr = msc_disk[lba];
memcpy(buffer, addr, bufsize);
return bufsize;
}
// Callback invoked when received WRITE10 command.
// Process data in buffer to disk's storage and
// return number of written bytes (must be multiple of block size)
int32_t msc_write_cb(uint32_t lba, uint8_t *buffer, uint32_t bufsize) {
uint8_t *addr = msc_disk[lba];
memcpy(addr, buffer, bufsize);
return bufsize;
}
// Callback invoked when WRITE10 command is completed (status received and accepted by host).
// used to flush any pending cache.
void msc_flush_cb(void) {
// nothing to do
}
*/
int readline(char *buffer, int len) {
int pos = 0;
char tm;
while (1) {
yield();
if (Serial.available()) {
tm = Serial.read();
Serial.write(tm);
}
switch (tm) {
case 0:
case '\n': // Ignore CR
break;
case '\r': // Return on new-line
return pos;
default:
if (pos < len - 1) {
buffer[pos++] = tm;
buffer[pos] = 0;
}
}
tm = 0;
}
}
void serial_putchar(char c) {
Serial.write(c);
}
char serial_getchar() {
return Serial.read();
}
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin PIN_SPI0_SCK as an output. (Red led)
// pinMode(R_LED, OUTPUT);
// initialize digital pin PIN_SPI0_SCK as an output. (Green led)
// pinMode(G_LED, OUTPUT);
// initialize digital pin 20 as an output. (Blue led)
pinMode(B_LED, OUTPUT);
// Turn off
// digitalWrite(B_LED, HIGH);
// digitalWrite(R_LED, HIGH);
// FastLED.addLeds<WS2812, DATA_PIN, RGB>(leds, NUM_LEDS); // GRB ordering is typical
// leds[0] = CRGB::Blue;
Serial.begin(115200);
while (!Serial)
{ yield(); }
Serial.println("Startup.....");
/*
Dir dir = LittleFS.openDir("/");
while (dir.next()) {
Serial.printf("%s:", dir.fileName().c_str());
if (dir.fileSize()) {
File f = dir.openFile("r");
Serial.println(f.size());
f.close();
}
}
*/
//df32 = SD.open("/df32_os8_4p.dsk", "r+");
Serial.print("Free heap:");
Serial.println(ESP.getMaxAllocHeap());
tft.init();
tft.initDMA();
tft.setRotation(1);
tft.fillScreen(0);
tft.setTextColor(tft.color565(0, 255, 0));
tft.setTextSize(1);
tft.println("PDP-8 Online");
spi.begin(SCK, MISO, MOSI, CS);
if (!SD.begin(CS, spi)) {
Serial.println("Card Mount Failed");
return;
}
listDir(SD, "/", 3);
rk05 = SD.open("/rk05.dsk", "r+");
Serial.println("initialization done.");
TStart();
xTaskCreatePinnedToCore(
TFTsetup, /* Function to implement the task */
"coreTask", /* Name of the task */
10000, /* Stack size in words */
NULL, /* Task input parameter */
0, /* Priority of the task */
NULL, /* Task handle. */
0); /* Core where the task should run */
Serial.println("Task created...");
}
// the loop function runs over and over again forever
void loop() {
xmain(3, NULL);
}
// Nano8.cpp
//
#define TTWAIT 4000
#define MEMSIZE 4096 * 8
short mem[MEMSIZE];
int pc, acc, ma, mq, tti, ttf, tto, intf, inst, ibus, pti, pto;
int ifl, dfl, ifr, dfr, svr, uflag, usint, intinh;
int kcnt = 0, tcnt = 0;
unsigned int dskrg, dskmem, dskfl, tm, i, tmp;
unsigned int dskad;
int vcflg,vcix,vciy;
int eaesc, eaemd, gtf;
void caf() {
acc = mq = tti = tto = ttf = ibus = pto = 0;
dfr = ifr = dfl = ifl = uflag = dskfl = 0;
pti = -2; // Flag clear until explicit fetch
eaemd = eaesc = gtf = vcflg = clken = clkfl = 0;
}
void iot() {
if (uflag == 3) {
usint = 1;
return;
}
switch (inst & 0770) {
case 0:
switch (inst & 0777) {
case 000:
if (intf)
pc++;
intf = intinh = 0;
break;
case 001:
intinh |= 1;
break;
case 002:
intf = intinh = 0;
break;
case 003:
if (ibus)
pc++;
break;
case 004:
acc = (acc & 010000) ? 014000 : 0;
if (intinh & 1)
acc |= 0200;
if (intf)
acc |= 01000;
if (gtf) acc |= 02000;
acc |= svr;
break;
case 005:
intinh = 3;
acc &= 07777;
if (acc & 04000)
acc |= 010000;
svr = acc & 0177;
dfr = (svr & 07) << 3;
dfl = dfr << 9;
ifr = (svr & 070);
if (svr & 0100)
uflag = 1;
gtf = acc & 02000;
break;
case 006:
if (gtf)
pc++;
break;
case 007:
caf();
break;
}
break;
case 0200:
case 0210:
case 0220:
case 0230:
case 0240:
case 0250:
case 0260:
case 0270:
switch (inst & 0777) {
case 0204:
usint = 0;
break;
case 0254:
if (usint)
pc++;
break;
case 0264:
uflag = 0;
break;
case 0274:
uflag = 1;
break;
case 0214:
acc |= dfr;
break;
case 0224:
acc |= ifr;
break;
case 0234:
acc |= svr;
break;
case 0244:
dfr = (svr & 07) << 3;
dfl = dfr << 9;
ifr = (svr & 070);
if (svr & 0100)
uflag = 1;
break;
}
switch (inst & 0707) {
case 0201:
dfr = inst & 070;
dfl = dfr << 9;
break;
case 0202:
ifr = inst & 070;
intinh |= 2;
break;
case 0203:
dfr = inst & 070;
ifr = inst & 070;
dfl = dfr << 9;
intinh |= 2;
break;
}
break;
case 010:
switch (inst & 07) {
case 01:
if (pti > -1)
pc++;
break;
case 02:
acc |= pti & 0377;
pti = -2;
break;
case 04:
pti = -1;
break;
case 06:
acc |= pti & 0377;
pti = -1;
break;
}
break;
case 020:
switch (inst & 07) {
case 1:
if (pto >= TTWAIT)
pc++;
break;
case 2:
pto = 0;
break;
case 6:
case 4:
pto = acc & 0177;
pto = 1;
break;
}
break;
case 030:
switch (inst & 07) {
case 1:
if (ttf)
pc++;
break;
case 2:
ttf = 0;
acc &= 010000;
break;
case 4:
acc |= tti | 0200;
break;
case 6:
acc &= 010000;
acc |= tti | 0200;
ttf = 0;
}
break;
case 040:
switch (inst & 07) {
case 1:
if (tto >= TTWAIT)
pc++;
break;
case 2:
tto = 0;
break;
case 6:
case 4:
Serial.write(acc & 0177);
if (telnet.isConnected())
telnet.write(acc & 0177);
//tft.write(acc & 0177);
tto = 1;
break;
}
break;
case 050: // Minimalist VC8E implementation
switch( inst&0777)
{
case 050: vcflg=0;break;
case 051: vcflg=0;break;
case 052: if (vcflg>100) pc++;break;
case 053: vcix=(acc&01777)^01000;vcflg=1;break;
case 054: vciy=(acc&01777)^01000;vcflg=1;break;
case 055: ndx = (int)(vciy / 4+40) + (int)(vcix/4)*320; bitmap[ndx] = 1; vcflg = 1; break;
case 056: acc&=010000;break;
case 057: acc=acc&010000;break;
}
break;
case 0600:
case 0610:
case 0620:
switch (inst & 0777) {
case 0601:
dskad = dskfl = 0;
break;
case 0605:
case 0603:
i = (dskrg & 070) << 9;
dskmem = ((mem[07751] + 1) & 07777) | i; /* mem */
tm = (dskrg & 03700) << 6;
dskad = (acc & 07777) + tm; /* dsk */
i = 010000 - mem[07750];
p = (uint8_t *)&mem[dskmem];
df32.seek(dskad * 2, SeekSet);
if (inst & 2) {
/*read */
tmp = df32.read(p, i * 2);
//Serial.printf("Read:%o>%o:%o,%d Len:%d\r\n", dskad, dskmem, dskrg, i, tmp);
} else {
tmp = df32.write(p, i * 2);
//Serial.printf("Write:%o>%o:%o,%d Len:%d\r\n", dskad, dskmem, dskrg, i, tmp);
}
dskfl = 1;
mem[07751] = 0;
mem[07750] = 0;
acc = acc & 010000;
break;
case 0611:
dskrg = 0;
break;
case 0615:
dskrg = (acc & 07777); /* register */
break;
case 0616:
acc = (acc & 010000) | dskrg;
break;
case 0626:
acc = (acc & 010000) + (dskad & 07777);
break;
case 0622:
if (dskfl) pc++;
break;
case 0612: acc = acc & 010000;
case 0621:
pc++; /* No error */
break;
}
break;
case 0740:
// printf("Acc:%04o IOT:%04o\n",acc,xmd);
switch (inst & 7) {
case 0:
break;
case 1:
if (rkdn) {
pc++;
rkdn = 0;
}
break;
case 2:
acc &= 010000;
rkdn = 0;
break;
case 3:
rkda = acc & 07777;
//
// OS/8 Scheme. 2 virtual drives per physical drive
// Regions start at 0 and 6260 (octal).
//
acc &= 010000;
if (rkcmd & 6) {
printf("Unit error\n");
return;
}
digitalWrite(B_LED, HIGH);
switch (rkcmd & 07000) {
case 0:
case 01000:
rkca |= (rkcmd & 070) << 9;
rkwc = (rkcmd & 0100) ? 128 : 256;
rkda |= (rkcmd & 1) ? 4096 : 0;
//f_lseek(&rk05, rkda * 512);
while (!rk05.seek(rkda * 512, SeekSet)) {
Serial.println("Seek fail");
rk05.close();
rk05 = SD.open("/rk05.dsk", "r+");
delay(500);
}
p = (uint8_t *)&mem[rkca];
//f_read(&rk05, p, rkwc * 2, &bcnt);
tmp = rk05.read(p, rkwc * 2);
// Serial.printf("Read Mem:%04o Dsk:%04o Len:%d\r\n", rkca, rkda, tmp);
rkca = (rkca + rkwc) & 07777;
rkdn++;
// printf(".");
break;
case 04000:
case 05000:
rkca |= (rkcmd & 070) << 9;
rkwc = (rkcmd & 0100) ? 128 : 256;
rkda |= (rkcmd & 1) ? 4096 : 0;
//printf("Write Mem:%04o Dsk:%04o\n",rkca,rkda);
//fseek(rk05,rkda*512,SEEK_SET);
//f_lseek(&rk05, rkda * 512);
rk05.seek(rkda * 512, SeekSet);
p = (uint8_t *)&mem[rkca];
//fwrite(p,2,rkwc,rk05);
//f_write(&rk05, p, rkwc * 2, &bcnt);
tmp = rk05.write(p, rkwc * 2);
//rk05.flush();
// Serial.printf("Write Mem:%04o Dsk:%04o Len:%d\r\n", rkca, rkda, tmp);
rkca = (rkca + rkwc) & 07777;
rkdn++;
break;
case 02000:
break;
case 03000:
if (rkcmd & 0200) rkdn++;
break;
}
digitalWrite(B_LED, LOW);
break;
case 4:
rkca = acc & 07777;
acc &= 010000;
break;
case 5:
// acc=(acc&010000)|(rkdn?04000:0);
acc = (acc & 010000) | 04000;
break;
case 6:
rkcmd = acc & 07777;
acc &= 010000;
break;
case 7:
printf("Not allowed...RK8E\n");
break;
}
break;
case 0130:
switch (inst & 0777)
{
case 0131: clken = 1; clkcnt = 0; break;
case 0132: clken = 0; break;
case 0133: if (clkfl) {
clkfl = 0;
pc++;
}
break;
}
break;
}
}
int group3(int xmd)
{
int qtm, xtm = xmd & 07721, xtc, earg, farg, dphi;
int tm1, tm2;
if (xmd == 07431) // Switch modes
{
eaemd = 1; return 0;
}
if (xmd == 07447 || xmd == 07777)
{
gtf = eaemd = 0; return 0;
}
if ((xmd == 07573 || xmd == 07575) && eaemd) { // DPIC and DCM here
if (xmd & 4) {
mq = ~mq; // Complement
acc = ~acc;
mq &= 07777;
}
acc &= 07777;
mq = mq + 1;
if (mq & 010000)
acc = acc + 1;
mq &= 07777;
acc &= 017777;
return 0;
}
if (xmd & 0200)
acc = acc & 010000;
if ((xmd & 0120) == 0120) {
qtm = acc;
acc = mq | (acc & 010000);
mq = qtm & 07777;
}
else {
if (xmd & 020) {
mq = acc & 07777;
acc &= 010000;
}
if (xmd & 0100)
acc |= mq;
}
if (xmd & 040 && !eaemd)
acc |= eaesc;
if (eaemd == 0) gtf = 0;
if ((pc & 07770) == 010)
mem[pc + ifl]++;
earg = mem[pc + ifl] & 07777;
// if ( eaemd && ( earg&07770 )==010 )
// mem[earg]++;
xtc = eaemd ? xmd & 056 : xmd & 016;
switch (xtc) {
case 0:
return 0;
break;
case 02:
if (eaemd)
{
eaesc = acc & 037;
acc &= 010000;
}
else {
eaesc = (~earg) & 037;
return 1;
}
return 0;
break;
case 04: // MUY
if (eaemd)
earg = mem[earg + dfl];
mq = mq * earg;
xtm = ((mq) >> 12) & 07777;
mq = ((acc & 07777) + mq) & 07777;
acc = xtm;
eaesc = 0;
return 1;
break;
case 06: // DVI
if (eaemd)
earg = mem[earg + dfl];
if ((acc & 07777) >= earg) { /* overflow? */
acc = acc | 010000; /* set link */
mq = ((mq << 1) + 1) & 07777; /* rotate MQ */
eaesc = 0; /* no shifts */
}
else {
xtm = ((acc & 07777) << 12) | mq;
mq = xtm / earg;
acc = xtm % earg;
eaesc = 015; /* 13 shifts */
}
return 1;
break;
case 010: // NMI
xtm = (acc << 12) | mq; /* preserve link */
for (eaesc = 0; ((xtm & 017777777) != 0) &&
(xtm & 040000000) == ((xtm << 1) & 040000000); eaesc++)
xtm = xtm << 1;
acc = (xtm >> 12) & 017777;
mq = xtm & 07777;
if (eaemd && ((acc & 07777) == 04000) && (mq == 0))
acc = acc & 010000; /* clr if 4000'0000 */
return 0;
break;
case 012: // SHL
eaesc = eaemd ? 037 : 0;
for (xtm = eaemd ? 0 : -1; xtm < (earg & 037); xtm++)
{
mq = mq << 1;
acc = acc << 1;
if (mq & 010000)
acc += 1;
}
mq &= 07777;
acc &= 017777;
return 1;
break;
case 014:
eaesc = eaemd ? 037 : 0;
//printf("ACC:%05o MQ:%04o EARG:%04o\r\n",acc,mq,earg);
if (acc & 04000)
acc |= 010000;
else
acc &= 07777;
for (xtm = eaemd ? 0 : -1; xtm < (earg & 037); xtm++)
{
gtf = mq & 1;
mq = mq >> 1;
if (acc & 04000)
acc |= 030000;
if (acc & 01)
mq |= 04000;
acc = acc >> 1;
}
mq &= 07777;
acc &= 017777;
return 1;
break;
case 016:
eaesc = eaemd ? 037 : 0;
acc &= 07777;
for (xtm = eaemd ? 0 : -1; xtm < (earg & 037); xtm++)
{
gtf = mq & 1;
mq = mq >> 1;
if (acc & 01)
mq |= 04000;
acc = acc >> 1;
}
mq &= 07777;
acc &= 07777;
return 1;
break;
case 040: // SCA
if (eaemd) {
acc &= 010000;
acc |= eaesc;
}
return 0;
case 042:
dphi = mem[earg + dfl + 1];
earg = mem[earg + dfl];
acc &= 07777;
mq = mq + earg;
if (mq & 010000)
acc = acc + 1;
acc = (acc + dphi) & 017777;
mq &= 07777;
return 1;
case 044:
mem[dfl + earg++] = mq;
mem[dfl + earg] = acc & 07777;
return 1;
case 050: // DPSZ
if ((acc & 07777) + mq == 0)
return 1;
break;
case 056: // SAM
acc &= 07777;
tm1 = (acc & 04000) ? acc - 010000 : acc;
tm2 = (mq & 04000) ? mq - 010000 : mq;
gtf = (tm1 <= tm2) ? 1 : 0;
acc = mq - acc;
acc &= 07777;
acc |= (acc <= mq) ? 010000 : 0;
default:
return 0;
}
return 0;
}
void group2() {
int state;
state = 0;
if (acc & 04000)
state |= 0100;
if ((acc & 07777) == 0)
state |= 040;
if (acc & 010000)
state |= 020;
if ((inst & 0160) == 0)
state = 0;
if (inst & 010) {
if ((~state & inst) == inst)
pc++;
} else if (state & inst)
pc++;
if (inst & 0200)
acc &= 010000;
if (inst & 4)
acc |= 0000; //OSR
}
void group1() {
if (inst & 0200)
acc &= 010000;
if (inst & 0100)
acc &= 07777;
if (inst & 040)
acc ^= 07777;
if (inst & 020)
acc ^= 010000;
if (inst & 1)
acc++;
acc &= 017777;
switch (inst & 016) {
case 2:
tmp = (acc << 6) | ((acc >> 6) & 077); // BSW .. v untidy!
tmp &= 07777;
if (acc & 010000) tmp |= 010000;
acc = tmp;
break;
case 06:
acc = acc << 1;
if (acc & 020000)
acc++;
case 04:
acc = acc << 1;
if (acc & 020000)
acc++;
break;
case 012:
if (acc & 1)
acc |= 020000;
acc = acc >> 1;
case 010:
if (acc & 1)
acc |= 020000;
acc = acc >> 1;
break;
}
acc &= 017777;
}
bool cycl(void) {
if (intf && ibus) {
mem[0] = pc & 07777;
pc = 1;
intf = intinh = 0;
svr = (ifl >> 9) + (dfl >> 12);
if (uflag == 3)
svr |= 0100;
dfr = ifr = dfl = ifl = uflag = 0;
}
ibus = ttf || (tto == TTWAIT) || usint || clkfl;
inst = mem[pc + ifl];
ma = ((inst & 0177) | ((inst & 0200) ? (pc & 07600) : 0)) + ifl;
if (inst & 0400 && inst < 06000) {
if ((ma & 07770) == 010)
mem[ma]++;
mem[ma] &= 07777;
if (inst & 04000)
ma = mem[ma] + ifl;
else
ma = mem[ma] + dfl;
}
//sprintf(bfr, "PC:%04o Inst:%04o MA:%04o Mem:%04o Acc:%05o\r\n", pc, inst, ma, mem[ma], acc);
//Serial.print(bfr);
pc++;
if (kcnt++ > 2000) {
Tloop();
if (telnet.isConnected()) {
if (telnet.peek() != -1 && !ttf) {
tti = telnet.read();
ttf = 1;
}
}
if (Serial.available() && !ttf) {
Serial.readBytes((char *)&tti, 1);
ttf = 1;
}
kcnt = 0;
if (tti == 5) // Halt on keypress ^e
return false;
}
if (tto && (tto < TTWAIT))
tto++;
if (pto && (pto < TTWAIT))
pto++;
if (vcflg && vcflg < 200)
vcflg++;
// 50 Hz clock ... set clock flag every 20000 cycles (av cycle=1us set by #cycles per call)
if ((++clkcnt == 20000) && clken) {
clkfl = 1;
clkcnt = 0;
}
switch (inst & 07000) {
case 0: //AND
acc &= mem[ma] | 010000;
break;
case 01000: //TAD
acc += mem[ma] & 07777;
break;
case 02000:
if (!(mem[ma] = (mem[ma] + 1) & 07777))
pc++;
break;
case 03000: //DCA
mem[ma] = acc & 07777;
acc &= 010000;
break;
case 04000: //JMS
ifl = ifr << 9;
ma = (ma & 07777) + ifl;
mem[ma] = pc;
pc = (ma + 1) & 07777;
intinh &= 1;
uflag |= 2;
break;
case 05000: //JMP
ifl = ifr << 9;
pc = (ma & 07777);
intinh &= 1;
uflag |= 2;
break;
case 06000: //IOT
iot();
break;
case 07000: //OPR
if (inst & 0400) {
if (inst & 1) {
if (group3(inst))
pc++;
break;
}
if (inst & 2)
return false;
group2();
} else
group1();
break;
}
acc &= 017777;
if (intinh == 1 && inst != 06001)
intf = 1;
return true;
}
int xmain(int argc, char *args[]) {
char bfr[128];
short dms[] = {
06603,
06622,
05201,
05604,
07600,
};
short os8[] = {
07600,
06603,
06622,
05352,
05752,
};
if (argc != 3) {
printf("Usage: nano8 <binfile> <start address (octal)>\n");
exit(1);
}
for (i = 0; i < 4096; i++)
mem[i] = 07402;
mem[07750] = 07576;
mem[07751] = 07576;
memcpy(&mem[0200], dms, sizeof(dms));
memcpy(&mem[07750], os8, sizeof(os8));
mem[030] = 06743;