printer: emulate Apple LaserWriter IISC SCSI printer

CMakeLists.txt

@@ -88,6 +88,7 @@ set(COMMON_SOURCES
     src/BlueSCSI_disk.cpp
     src/BlueSCSI_cdrom.cpp
     src/BlueSCSI_tape.cpp
+    src/BlueSCSI_printer.cpp
     src/BlueSCSI_log.cpp
     src/BlueSCSI_log_trace.cpp
     src/BlueSCSI_blink.cpp

lib/BlueSCSI_platform_RP2MCU/rp2040-template.ld

@@ -159,6 +159,8 @@ SECTIONS
         *BlueSCSI_settings.cpp.o(.text .text*)
         *QuirksCheck.cpp.o(.text .text*)
         *(.text*scsiDiskFilenameValid*)
+        *(.text*scsiDiskFolderIs*)
+        *(.text*scsiDiskFolderContainsCueSheet*)
         *(.text*scsiDiskOpenHDDImage*)
         *(.text*scsiDiskGetNextImageName*)
         *(.text*scsiDiskProgramRomDrive*)
@@ -189,6 +191,7 @@ SECTIONS
         *(.text*scsiTapeCommand*)
         *(.text*scsiCDRomCommand*)
         *(.text*scsiMOCommand*)
+        *BlueSCSI_printer.cpp.o(.text .text*)
         *(.text*doReadCD*)
         *(.text*doReadTOC*)
         *(.text*doReadHeader*)

lib/SCSI2SD/include/scsi2sd.h

@@ -80,6 +80,7 @@ typedef enum
 	S2S_CFG_NETWORK = 6,
 	S2S_CFG_ZIP100 = 7,
 	S2S_CFG_AMIGAWIFI = 8,
+	S2S_CFG_PRINTER = 9,
 	S2S_CFG_NOT_SET = 255
 
 } S2S_CFG_TYPE;

lib/SCSI2SD/src/firmware/inquiry.c

@@ -224,7 +224,14 @@ void s2s_scsiInquiry()
 		case S2S_CFG_AMIGAWIFI:
 			scsiDev.data[2] = 0x01;  // Page code.
 			break;
-
+
+		case S2S_CFG_PRINTER:
+			// Apple LaserWriter IISC reports pre-SCSI-2 (ANSI version 0,
+			// response format SCSI-1 CCS).
+			scsiDev.data[2] = 0x00;
+			scsiDev.data[3] = 0x00;
+			break;
+
 		default:
 			// Accept defaults for a fixed disk.
 			break;
@@ -282,8 +289,21 @@ uint32_t s2s_getStandardInquiry(
 		out[7] = 0x00; // Disable sync and linked commands
 		out[4] = 0x75; // 117 length
 	}
+	if(cfg->deviceType == S2S_CFG_PRINTER)
+	{
+		// Apple LaserWriter IISC trailing vendor-specific bytes (firmware/ROM
+		// rev). The driver only checks the first 36 bytes, but TattleTech and
+		// other diagnostics may read these.
+		static const uint8_t LaserWriterVendor[] =
+			{0x00, 0x00, 0x00, 0xFE, 0x20, 0x27, 0x20, 0xFF};
+		if (size + sizeof(LaserWriterVendor) <= maxlen)
+		{
+			memcpy(&out[size], LaserWriterVendor, sizeof(LaserWriterVendor));
+			size += sizeof(LaserWriterVendor);
+		}
+	}
 	// Iomega already has a vendor inquiry
-	if(cfg->deviceType != S2S_CFG_NETWORK && cfg->deviceType != S2S_CFG_ZIP100) {
+	else if(cfg->deviceType != S2S_CFG_NETWORK && cfg->deviceType != S2S_CFG_ZIP100) {
 		memcpy(&out[size], INQUIRY_NAME, sizeof(INQUIRY_NAME) - 1);
 		size += sizeof(INQUIRY_NAME) - 1;
 		out[size++] = TOOLBOX_API;
@@ -322,6 +342,11 @@ uint8_t getDeviceTypeQualifier()
 		return 0x03;
 		break;
 
+	case S2S_CFG_PRINTER:
+		// printer device
+		return 0x02;
+		break;
+
 	default:
 		// Accept defaults for a fixed disk.
 		return 0;

lib/SCSI2SD/src/firmware/printer.h

@@ -0,0 +1,25 @@
+/**
+* Copyright (C) 2026 Eric Helgeson
+*
+* This file is part of BlueSCSI
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <https://www.gnu.org/licenses/>.
+**/
+
+#ifndef PRINTER_H
+#define PRINTER_H
+
+int scsiPrinterCommand(void);
+
+#endif

lib/SCSI2SD/src/firmware/scsi.c

@@ -2,6 +2,7 @@
 //	Copyright (c) 2023 joshua stein <jcs@jcs.org>
 //	Copyright (c) 2023 Andrea Ottaviani <andrea.ottaviani.69@gmail.com>
 //	Copyright (c) 2024-2025 Rabbit Hole Computing™
+//	Copyright (c) 2026 Eric Helgeson
 //
 //	This file is part of SCSI2SD.
 //
@@ -33,6 +34,7 @@
 #include "bsp.h"
 #include "cdrom.h"
 #include "network.h"
+#include "printer.h"
 #include "tape.h"
 #include "mo.h"
 #include "vendor.h"
@@ -717,6 +719,7 @@ static void process_Command()
 		((cfg->deviceType == S2S_CFG_AMIGAWIFI && amigaWifiCommand())) ||
 		((cfg->deviceType == S2S_CFG_NETWORK && scsiNetworkCommand())) ||
 #endif // BLUESCSI_NETWORK
+		((cfg->deviceType == S2S_CFG_PRINTER) && scsiPrinterCommand()) ||
 		((cfg->deviceType == S2S_CFG_MO) && scsiMOCommand()))
 	{
 		// Already handled.

src/BlueSCSI.cpp

@@ -251,6 +251,8 @@ static const char * typeToChar(int deviceType)
       return "Removable";
     case S2S_CFG_ZIP100:
       return "ZIP100";
+    case S2S_CFG_PRINTER:
+      return "Printer";
     default:
       return "Unknown";
   }
@@ -494,7 +496,7 @@ bool findHDDImages()
     }
 
     char name[MAX_FILE_PATH+1];
-    if(!file.isDir() || scsiDiskFolderContainsCueSheet(&file) || scsiDiskFolderIsTapeFolder(&file)) {
+    if(!file.isDir() || scsiDiskFolderContainsCueSheet(&file) || scsiDiskFolderIsTapeFolder(&file) || scsiDiskFolderIsPrinterFolder(&file)) {
       file.getName(name, MAX_FILE_PATH+1);
       file.close();
 
@@ -555,12 +557,13 @@ bool findHDDImages()
       bool is_re = (tolower(name[0]) == 'r' && tolower(name[1]) == 'e');
       bool is_tp = (tolower(name[0]) == 't' && tolower(name[1]) == 'p');
       bool is_zp = (tolower(name[0]) == 'z' && tolower(name[1]) == 'p');
+      bool is_pr = (tolower(name[0]) == 'p' && tolower(name[1]) == 'r');
 #ifdef BLUESCSI_NETWORK
       bool is_ne = (tolower(name[0]) == 'n' && tolower(name[1]) == 'e');
       bool is_am = (tolower(name[0]) == 'a' && tolower(name[1]) == 'm');
 #endif // BLUESCSI_NETWORK
 
-      if (is_hd || is_cd || is_fd || is_mo || is_re || is_tp || is_zp
+      if (is_hd || is_cd || is_fd || is_mo || is_re || is_tp || is_zp || is_pr
 #ifdef BLUESCSI_NETWORK
         || is_ne || is_am
 #endif // BLUESCSI_NETWORK
@@ -646,6 +649,7 @@ bool findHDDImages()
         if (is_re) type = S2S_CFG_REMOVABLE;
         if (is_tp) type = S2S_CFG_SEQUENTIAL;
         if (is_zp) type = S2S_CFG_ZIP100;
+        if (is_pr) type = S2S_CFG_PRINTER;
 
         g_scsi_settings.initDevice(id & 7, type);
         // Open the image file
@@ -700,7 +704,8 @@ bool findHDDImages()
     {
       int capacity_kB = ((uint64_t)cfg->scsiSectors * cfg->bytesPerSector) / 1024;
 
-      if (cfg->deviceType == S2S_CFG_NETWORK || cfg->deviceType == S2S_CFG_AMIGAWIFI)
+      if (cfg->deviceType == S2S_CFG_NETWORK || cfg->deviceType == S2S_CFG_AMIGAWIFI ||
+          cfg->deviceType == S2S_CFG_PRINTER)
       {
         logmsg("ID: ", (int)s2s_getTargetId(cfg),
               ", Type: ", typeToChar((int)cfg->deviceType));

src/BlueSCSI_config.h

@@ -3,6 +3,7 @@
  *
  * ZuluSCSI™ - Copyright (c) 2022-2025 Rabbit Hole Computing™
  * Portions copyright (c) 2023 joshua stein <jcs@jcs.org>
+ * Copyright (c) 2026 Eric Helgeson
  *
  * ZuluSCSI™ firmware is licensed under the GPL version 3 or any later version.
  *
@@ -105,6 +106,7 @@
 #define DRIVEINFO_NETWORK   {"Dayna",    "SCSI/Link",       "2.0f", ""}
 #define DRIVEINFO_TAPE      {"BLUESCSI", "TAPE",      PLATFORM_REVISION, ""}
 #define DRIVEINFO_AMIGAWIFI {"AmigaNET", "SCSI/Link", "1.0f", ""}
+#define DRIVEINFO_PRINTER   {"APPLE",    "PERSONAL LASER", "1.00", ""}
 
 // Default block size
 #define DEFAULT_BLOCKSIZE 512
@@ -126,6 +128,7 @@
 #define APPLE_DRIVEINFO_MAGOPT    {"MOST",     "RMD-5200",          PLATFORM_REVISION, "1.0"}
 #define APPLE_DRIVEINFO_NETWORK   {"Dayna",    "SCSI/Link",       "2.0f", ""}
 #define APPLE_DRIVEINFO_TAPE      {"BlueSCSI", "APPLE_TAPE",        PLATFORM_REVISION, ""}
+#define APPLE_DRIVEINFO_PRINTER   {"APPLE",    "PERSONAL LASER",    "1.00", ""}
 
 // Default Iomega ZIP drive information
 #define IOMEGA_DRIVEINFO_ZIP100     {"IOMEGA", "ZIP 100", "D.13", ""}

src/BlueSCSI_disk.cpp

@@ -504,7 +504,7 @@ bool scsiDiskOpenHDDImage(int target_idx, const char *filename, int scsi_lun, in
         img.scsiId = target_idx | S2S_CFG_TARGET_ENABLED;
         img.sdSectorStart = 0;
 
-        if (img.scsiSectors == 0 && type != S2S_CFG_NETWORK && type != S2S_CFG_AMIGAWIFI && !img.file.isFolder())
+        if (img.scsiSectors == 0 && type != S2S_CFG_NETWORK && type != S2S_CFG_AMIGAWIFI && type != S2S_CFG_PRINTER && !img.file.isFolder())
         {
             logmsg("---- Error: image file ", filename, " is empty");
             img.file.close();
@@ -607,8 +607,29 @@ bool scsiDiskOpenHDDImage(int target_idx, const char *filename, int scsi_lun, in
                 logmsg("---- Zip 100 disk (", (int)img.file.size(), " bytes) is not exactly ", ZIP100_DISK_SIZE, " bytes, may not work correctly");
             }
         }
+        else if (type == S2S_CFG_PRINTER)
+        {
+            logmsg("---- Configuring as printer (LaserWriter IISC)");
+            img.deviceType = S2S_CFG_PRINTER;
+            // The PR<id>/ folder doubles as the spool target. If the user
+            // registered the device with a placeholder file, create the
+            // folder for them so they have a clear place to look for prints.
+            char dirpath[16];
+            snprintf(dirpath, sizeof(dirpath), "/PR%d", target_idx);
+            if (!SD.exists(dirpath))
+            {
+                if (SD.mkdir(dirpath))
+                {
+                    logmsg("---- Created printer spool folder ", dirpath);
+                }
+                else
+                {
+                    logmsg("---- WARNING: failed to create printer spool folder ", dirpath);
+                }
+            }
+        }
 
-        if (type != S2S_CFG_OPTICAL && type != S2S_CFG_NETWORK && type != S2S_CFG_AMIGAWIFI)
+        if (type != S2S_CFG_OPTICAL && type != S2S_CFG_NETWORK && type != S2S_CFG_AMIGAWIFI && type != S2S_CFG_PRINTER)
         {
             autoConfigGeometry(img);
         }
@@ -825,7 +846,21 @@ bool scsiDiskFolderIsTapeFolder(FsFile *dir)
     dir->getName(filename, sizeof(filename));
     // string starts with 'tp', the 3rd character is a SCSI ID, and it has more 3 charters
     // e.g. "tp0 - tape 01"
-    if (strlen(filename) > 3 && strncasecmp("tp", filename, 2) == 0 
+    if (strlen(filename) > 3 && strncasecmp("tp", filename, 2) == 0
+        && filename[2] >= '0' && filename[2] - '0' < NUM_SCSIID)
+    {
+        return true;
+    }
+    return false;
+}
+
+bool scsiDiskFolderIsPrinterFolder(FsFile *dir)
+{
+    // A PR<N>/ directory (e.g. "PR4") both registers the printer and acts
+    // as the spool target. The 3rd character must be a valid SCSI ID digit.
+    char filename[MAX_FILE_PATH + 1];
+    dir->getName(filename, sizeof(filename));
+    if (strlen(filename) >= 3 && strncasecmp("pr", filename, 2) == 0
         && filename[2] >= '0' && filename[2] - '0' < NUM_SCSIID)
     {
         return true;

src/BlueSCSI_disk.h

@@ -154,6 +154,11 @@ bool scsiDiskFolderContainsCueSheet(FsFile *dir);
 // Checks if the directory name is for multi tagged tapes
 bool scsiDiskFolderIsTapeFolder(FsFile *dir);
 
+// Checks if the directory name matches the PR<N>/ printer convention
+// (e.g. "PR4"). Such a folder both registers a SCSI printer and serves
+// as the spool target for captured print jobs.
+bool scsiDiskFolderIsPrinterFolder(FsFile *dir);
+
 // Clear the ROM drive header from flash
 bool scsiDiskClearRomDrive();
 // Program ROM drive and rename image file