Raspberry PI PICO ATARI ST Hard Drive Emulator (WIP)

[dad664npc]

Hi - I have had a batch made. Unfortunately there is a problem with the ACSI bus IDC pinout. I need to make up a test cable and test further, but at the moment I am working on trying to get PIStorm working with ATARI STs :). Once I'm happy with the outcome, I will post on here
Cheers

[alexh]

at the moment I am working on trying to get PIStorm working with ATARI STs :)

Are you using Pistorm-ST by BadWolf?

https://github.com/dh219/pistorm/tree/wip-pistormst

(Ah I just noticed you're CryptoDad over on the Discord server)

[jfceklosky]

Thanks for letting us know about the issue with the first batch board IDC connector issue.

When you have things worked out, I would be very willing to help test these out.

I have 2 MEGA ST's one with TOS 1.04 and the other with TOS 2.06/ICD Adspeed 16 installed. I have an STE on the way, but I am unsure about the status of this unit.

[jfceklosky]

I have a gerber for a DB 19 to IDC 20 if you need one. I modeled this after the one that have for an Ultra Satan device.

[Chris O.]

About Ultrasatan RTC if you need this feel free to use it.
This is for my ACSI to Teensy 4.1 hard drive implementation with MTP.

Code: Select all

case 0x20: // UltraSatan's special commands (0x20).

  // from https://github.com/atarijookie/ce-atari/blob/master/ultrasatan/UltraSatan/special.c
  //-----------------------------------------------
  // Format of UltraSatan's special commands is as follows:
  // cmd[0] - (ACSI ID << 5) | 0x1f   - command in ICD format
  // cmd[1] - 0x20     - group code 1 (1 + 10 bytes long command) and command TEST UNIT READY
  // cmd[2..3]         - the 'US' string (US as UltraSatan)
  // cmd[4..7]         - special command code / string
  // cmd[8..10]        - 3 bytes of parameters

  // so the complete command could look like this:
  // 0x1f, 0x20, 'USRdFW', 0x01, 0x0010  (ACSI device 0: read sector 0x0010 of firmware 1)
  //-----------------------------------------------

  // All i need is RTC functionality implemented from UltraSatan's RTC clock tools (US_GETCL.PRG or US_SETCL.PRG).
  // for exemple: Len 11 Command  1F 20 55 53 43 75 72 6E 74 46 57 -- ReadCurrentFirmwareName

  // cmd[2..3]         - the 'US' string (US as UltraSatan)
  if (cmdBuf[2] == 'U' && cmdBuf[3] == 'S') {            // some UltraSatan's specific commands?
    Serial.println(" ICD 0x1F UltraSatan's special commands (0x20)");

    for (uint32_t i = 0; i < 512; i++) {
      dataBuf[i] = 0; // clear the data buffer
    }

    // cmd [4.5.10]
    if (cmdBuf[4] == 'C' && cmdBuf[5] == 'u' && cmdBuf[10] == 'W') { // read the name of currently running FW (VERSION STRING)
      Serial.println(" read the name of currently running FW");
      // cmd# 00 01 02 03 04 05 06 07 08 09 10  Len 11.
      // HEX  1F 20 55 53 43 75 72 6E 74 46 57 // Special_ReadCurrentFirmwareName  https://github.com/atarijookie/ce-atari/blob/master/ultrasatan/UltraSatan/scsi_icd.c
      //     ICD **  U  S  C  u  r  n  t  F  W

      // Teensy STRING for the US_GETCL.PRG or US_SETCL.PRG
      dataBuf[0] = 'T'; //
      dataBuf[1] = 'e'; //
      dataBuf[2] = 'e'; //
      dataBuf[3] = 'n'; //
      dataBuf[4] = 's'; //
      dataBuf[5] = 'y'; //
      dataBuf[6] = ' '; //
      dataBuf[7] = '4'; //
      dataBuf[8] = '.'; //
      dataBuf[9] = '1'; //
      dataBuf[10] = ' '; //
      dataBuf[11] = 'A'; //
      dataBuf[12] = 'C'; //
      dataBuf[13] = 'S'; //
      dataBuf[14] = 'I'; //
      dataBuf[15] = ' '; //
      dataBuf[16] = 'V'; //
      dataBuf[17] = 'e'; //
      dataBuf[18] = 'r'; //
      dataBuf[19] = '.'; //
      dataBuf[20] = '0'; //
      dataBuf[21] = '.'; //
      dataBuf[22] = '0'; //
      dataBuf[23] = '1'; //
      dataBuf[24] = 0x00; //

      sendDma(512);  // 512
      commandSuccess();

    } else if (cmdBuf[4] == 'R' && cmdBuf[5] == 'd' && cmdBuf[10] == 'C') { // read clock
      Serial.print(" read clock ");
      // cmd#            00 01 02 03 04 05 06 07 08 09 10
      // Len 11 Command  1F 20 55 53 52 64 43 6C 52 54 43
      //                ICD     U  S  R  d  C  l  R  T  C
      digitalClockDisplay(); // Show on Serial

      dataBuf[0] = 'R';                        // RTC signature
      dataBuf[1] = 'T';
      dataBuf[2] = 'C';
      // fill dataBuf with clock data
      dataBuf[3] = (year() - 2000); // yea;
      dataBuf[4] = month();         // mon;
      dataBuf[5] = day();           // day;
      dataBuf[6] = hour();          // hou;
      dataBuf[7] = minute();        // min;
      dataBuf[8] = second();        // sec;

      sendDma(512);  // send 512 bytes
      commandSuccess();

    } else if (cmdBuf[4] == 'W' && cmdBuf[5] == 'r' && cmdBuf[10] == 'C') { // SET, write clock
      Serial.println(" write clock ");
      // cmd#            00 01 02 03 04 05 06 07 08 09 10
      // Len 11 Command  1F 20 55 53 57 72 43 6C 52 54 43
      //                ICD     U  S  W  r  C  l  R  T  C
      readDma(512); // read 512 bytes
      commandSuccess();

      Serial.print(' ');
      Serial.write(dataBuf[0]);               // RTC signature
      Serial.write(dataBuf[1]);
      Serial.write(dataBuf[2]);
      Serial.print(' ');
      for (uint32_t i = 3; i < 9; i++) {
        Serial.print(dataBuf[i]); //  data buffer
        Serial.print(' ');
      }
      // This sets the system time lib. (NOT the Teensy RTC Clock)
      // set your seperated date/time variables out as normal and update system time FIRST
      //setTime(hour(), minute(), second(), day(), month(), year())
      setTime(dataBuf[6], dataBuf[7], dataBuf[8], dataBuf[5], dataBuf[4], dataBuf[3]); // (hr,min,sec,day,mnth,yr) --- yr is 2 or 4 digit yr (2010 or 10 sets year to 2010)
      // now lets set the RTC in teensy before exiting.
      // now we can use the system time to update the Teensy's RTC bits
      // This sets the Teensy RTC Clock from Arduino Time library(system time) - epoch stylee, just like it wants :)
      Teensy3Clock.set(now());


      // Len 11 Command  1F 20 55 53 52 64 53 74 0 0 0
      //                ICD     U  S  R  d  S  t  null  // read settings


    } else {
      sdc.lastErr = LASTERR_OPCODE; // Invalid Command (opcode not implemented)
      commandError();
    }
    /*
      if (!cmpn(&cmdBuf[4], "RdFW", 4))                // firmware read?
      {
      Special_ReadFW();
      return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "WrFW", 4))                // firmware write?
      {
      Special_WriteFW();
      return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "RdSt", 4))                // read settings?
      {
      Special_ReadSettings();
      return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "WrSt", 4))                // write settings?
      {
      Special_WriteSettings();
      return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "RdCl", 4))                // read clock?
      {
      // Special_ReadRTC(); // todo
      //return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "WrCl", 4))                // write clock?
      {
      // Special_WriteRTC(); // todo
      //return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "CurntFW", 7))               // read the name of currently running FW?
      {
      // Special_ReadCurrentFirmwareName(); // todo
      //return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "RdINQRN", 7))                 // read INQUIRY name?
      {
      Special_ReadInquiryName();
      return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "WrINQRN", 7))                 // write INQUIRY name?
      {
      Special_WriteInquiryName();
      return;
      }
      //---------
      if (!cmpn(&cmdBuf[4], "RdLog", 5))                   // read command log?
      {
      Special_ReadLog();
      return;
      }
    */
  } else {
    sdc.lastErr = LASTERR_OPCODE; // Invalid Command (opcode not implemented)
    commandError();
  }
  break;

[dad664npc]

Not some great news... for the PCB design, I used an auto direction voltage level translator (TXB0108). This part has proven to be troublesome for me, in that I see random data (noise?) and very slow direction switching. This of course means the design does not work.

For the prototype, I used a 74LVC245 part. I moved away from this at some point as I was having unreliable IO and purchased a couple of Adafruit voltage level translators instead. This allowed me to develop the software and have a reliable interface.

In retrospect, I am guessing I was having software problems at the time as now, I have reverted back to this 245 part and it works reliably and is fast - seeing short transfer speeds of 2.5 MB/s and sustained transfer speeds of 980 KB/s when running PICO at 133 MHz.

This is the first time I have designed a PCB and it has been enjoyable and expensive. My first batch did not work at all as I had chosen the wrong chip footprint for the selected part. The second batch (the current batch), I have wired the IDC connector incorrectly but was able to continue testing with a modified cable.

At some point in the near future, I will try again - 3rd time lucky... watch this space...

[jfceklosky]

Thanks for the update. I will be keeping an on the project and will be willing to print out a board and test.

For the board will you be going with TH (through hole) components?

[dad664npc]

Been a while.
Busy getting PiStorm working on the ATARI.
Attempt three works YAY! Over the next few days, I will update GitHub.

New-HDC.jpg

[Cyprian]

nice project

[jfceklosky]

Nice to see the progress. I am very interested in building one of these up!

I would also be willing to work on a TH design based on your original board.