diff --git a/fujinet_pc.cmake b/fujinet_pc.cmake
index 5e96ba516..eda531d2b 100644
--- a/fujinet_pc.cmake
+++ b/fujinet_pc.cmake
@@ -208,10 +208,10 @@ set(SOURCES
 #     lib/media/apple/mediaTypeDSK.h lib/media/apple/mediaTypeDSK.cpp
 #     lib/media/apple/mediaTypePO.h lib/media/apple/mediaTypePO.cpp
 #     lib/media/apple/mediaTypeWOZ.h lib/media/apple/mediaTypeWOZ.cpp
-#     lib/media/atari/diskType.h lib/media/atari/diskType.cpp
-#     lib/media/atari/diskTypeAtr.h lib/media/atari/diskTypeAtr.cpp
-#     lib/media/atari/diskTypeAtx.h 
-#     lib/media/atari/diskTypeXex.h lib/media/atari/diskTypeXex.cpp
+    lib/media/atari/diskType.h lib/media/atari/diskType.cpp
+    lib/media/atari/diskTypeAtr.h lib/media/atari/diskTypeAtr.cpp
+    lib/media/atari/diskTypeAtx.h 
+    lib/media/atari/diskTypeXex.h lib/media/atari/diskTypeXex.cpp
     lib/base64/base64.h lib/base64/base64.c
     lib/encrypt/crypt.h lib/encrypt/crypt.cpp
     lib/compat/compat_inet.c
diff --git a/lib/media/atari/diskType.cpp b/lib/media/atari/diskType.cpp
index f9d5bc956..867334d36 100755
--- a/lib/media/atari/diskType.cpp
+++ b/lib/media/atari/diskType.cpp
@@ -138,7 +138,11 @@ void MediaType::unmount()
 {
     if (_disk_fileh != nullptr)
     {
+#ifdef ESP_PLATFORM
         fclose(_disk_fileh);
+#else
+        _disk_fileh->close();
+#endif
         _disk_fileh = nullptr;
     }
 }
diff --git a/lib/media/atari/diskType.h b/lib/media/atari/diskType.h
index 2a1c57665..902a984cf 100755
--- a/lib/media/atari/diskType.h
+++ b/lib/media/atari/diskType.h
@@ -1,11 +1,15 @@
 #ifndef _MEDIATYPE_
 #define _MEDIATYPE_
 
-// #include <stdio.h>
-#include <fujiHost.h>
 #include <stdint.h>
 
+#ifdef ESP_PLATFORM
+#include <stdio.h>
+#else
 #include "fnFile.h"
+#endif
+
+#include "fujiHost.h"
 
 #define INVALID_SECTOR_VALUE 65536
 
diff --git a/lib/media/atari/diskTypeAtr.cpp b/lib/media/atari/diskTypeAtr.cpp
index 58eb8cbc1..bef0205c0 100755
--- a/lib/media/atari/diskTypeAtr.cpp
+++ b/lib/media/atari/diskTypeAtr.cpp
@@ -4,6 +4,8 @@
 
 #include <memory.h>
 #include <string.h>
+#include <unistd.h>
+#include <errno.h>
 
 #include "../../include/debug.h"
 
@@ -52,7 +54,7 @@ uint32_t MediaTypeATR::_sector_to_offset(uint16_t sectorNum)
 // Returns TRUE if an error condition occurred
 bool MediaTypeATR::read(uint16_t sectornum, uint16_t *readcount)
 {
-    Debug_print("ATR READ\r\n");
+    Debug_printf("ATR READ %d / %d\r\n", sectornum, _disk_num_sectors);
 
     *readcount = 0;
 
@@ -72,11 +74,19 @@ bool MediaTypeATR::read(uint16_t sectornum, uint16_t *readcount)
     if (sectornum != _disk_last_sector + 1)
     {
         uint32_t offset = _sector_to_offset(sectornum);
+#ifdef ESP_PLATFORM
         err = fseek(_disk_fileh, offset, SEEK_SET) != 0;
+#else
+        err = _disk_fileh->seek(offset, SEEK_SET) != 0;
+#endif
     }
 
     if (err == false)
+#ifdef ESP_PLATFORM
         err = fread(_disk_sectorbuff, 1, sectorSize, _disk_fileh) != sectorSize;
+#else
+        err = _disk_fileh->read(_disk_sectorbuff, 1, sectorSize) != sectorSize;
+#endif
 
     if (err == false)
         _disk_last_sector = sectornum;
@@ -96,12 +106,16 @@ bool inHighScoreRange(int minimum, int maximum, int val)
 // Returns TRUE if an error condition occurred
 bool MediaTypeATR::write(uint16_t sectornum, bool verify)
 {
+#ifdef ESP_PLATFORM
     FILE *oldFileh, *hsFileh;
+#else
+    FileHandler *oldFileh, *hsFileh;
+#endif
 
     oldFileh = nullptr;
     hsFileh = nullptr;
 
-    Debug_printf("ATR WRITE\r\n", sectornum, _disk_num_sectors);
+    Debug_printf("ATR WRITE %d / %d\r\n", sectornum, _disk_num_sectors);
 
     // Return an error if we're trying to write beyond the end of the disk
     if (sectornum > _disk_num_sectors)
@@ -120,7 +134,11 @@ bool MediaTypeATR::write(uint16_t sectornum, bool verify)
         else
         {
             oldFileh = _disk_fileh;
+#ifdef ESP_PLATFORM
             hsFileh = _disk_host->file_open(_disk_filename, _disk_filename, strlen(_disk_filename) + 1, "r+");
+#else
+            hsFileh = _disk_host->filehandler_open(_disk_filename, _disk_filename, strlen(_disk_filename) + 1, "rb+");
+#endif
             _disk_fileh = hsFileh;
         }
     }
@@ -133,7 +151,11 @@ bool MediaTypeATR::write(uint16_t sectornum, bool verify)
     int e;
     if (sectornum != _disk_last_sector + 1)
     {
+#ifdef ESP_PLATFORM
         e = fseek(_disk_fileh, offset, SEEK_SET);
+#else
+        e = _disk_fileh->seek(offset, SEEK_SET);
+#endif
         if (e != 0)
         {
             Debug_printf("::write seek error %d\r\n", e);
@@ -141,15 +163,23 @@ bool MediaTypeATR::write(uint16_t sectornum, bool verify)
         }
     }
     // Write the data
+#ifdef ESP_PLATFORM
     e = fwrite(_disk_sectorbuff, 1, sectorSize, _disk_fileh);
+#else
+    e = _disk_fileh->write(_disk_sectorbuff, 1, sectorSize);
+#endif
     if (e != sectorSize)
     {
         Debug_printf("::write error %d, %d\r\n", e, errno);
         return true;
     }
 
+#ifdef ESP_PLATFORM
     int ret = fflush(_disk_fileh);    // This doesn't seem to be connected to anything in ESP-IDF VF, so it may not do anything
     ret = fsync(fileno(_disk_fileh)); // Since we might get reset at any moment, go ahead and sync the file (not clear if fflush does this)
+#else
+    int ret = _disk_fileh->flush();
+#endif
     Debug_printf("ATR::write fsync:%d\r\n", ret);
 
     if (_high_score_sector != 0)
@@ -157,7 +187,11 @@ bool MediaTypeATR::write(uint16_t sectornum, bool verify)
         Debug_printf("Closing high score sector.\r\n");
 
         if (hsFileh != nullptr)
+#ifdef ESP_PLATFORM
             fclose(hsFileh);
+#else
+            hsFileh->close();
+#endif
 
         _disk_fileh = oldFileh;
         _disk_last_sector = INVALID_SECTOR_VALUE; // force a cache invalidate.
@@ -218,7 +252,11 @@ bool MediaTypeATR::format(uint16_t *responsesize)
 
  07-0F have two possible interpretations but are no critical for our use
 */
+#ifdef ESP_PLATFORM
 mediatype_t MediaTypeATR::mount(FILE *f, uint32_t disksize)
+#else
+mediatype_t MediaTypeATR::mount(FileHandler *f, uint32_t disksize)
+#endif
 {
     Debug_print("ATR MOUNT\r\n");
 
@@ -230,12 +268,20 @@ mediatype_t MediaTypeATR::mount(FILE *f, uint32_t disksize)
 
     // Get file and sector size from header
     int i;
+#ifdef ESP_PLATFORM
     if ((i = fseek(f, 0, SEEK_SET)) < 0)
+#else
+    if ((i = f->seek(0, SEEK_SET)) < 0)
+#endif
     {
         Debug_printf("failed seeking to header on disk image (%d, %d)\r\n", i, errno);
         return _disktype;
     }
+#ifdef ESP_PLATFORM
     if ((i = fread(buf, 1, sizeof(buf), f)) != sizeof(buf))
+#else
+    if ((i = f->read(buf, 1, sizeof(buf))) != sizeof(buf))
+#endif
     {
         Debug_printf("failed reading header bytes (%d, %d)\r\n", i, errno);
         return _disktype;
@@ -280,7 +326,11 @@ mediatype_t MediaTypeATR::mount(FILE *f, uint32_t disksize)
 }
 
 // Returns FALSE on error
+#ifdef ESP_PLATFORM
 bool MediaTypeATR::create(FILE *f, uint16_t sectorSize, uint16_t numSectors)
+#else
+bool MediaTypeATR::create(FileHandler *f, uint16_t sectorSize, uint16_t numSectors)
+#endif
 {
     Debug_print("ATR CREATE\r\n");
 
@@ -328,7 +378,11 @@ bool MediaTypeATR::create(FILE *f, uint16_t sectorSize, uint16_t numSectors)
     Debug_printf("Write header to ATR: sec_size=%d, sectors=%d, paragraphs=%d, bytes=%d\r\n",
                  sectorSize, numSectors, num_paragraphs, total_size);
 
+#ifdef ESP_PLATFORM
     uint32_t offset = fwrite(&atrHeader, 1, sizeof(atrHeader), f);
+#else
+    uint32_t offset = f->write(&atrHeader, 1, sizeof(atrHeader));
+#endif
 
     // Write first three 128 uint8_t sectors
     uint8_t blank[512] = {0};
@@ -337,10 +391,14 @@ bool MediaTypeATR::create(FILE *f, uint16_t sectorSize, uint16_t numSectors)
     {
         for (int i = 0; i < 3; i++)
         {
+#ifdef ESP_PLATFORM
             size_t out = fwrite(blank, 1, 128, f);
+#else
+            size_t out = f->write(blank, 1, 128);
+#endif
             if (out != 128)
             {
-                Debug_printf("Error writing sector %hhu\r\n", i);
+                Debug_printf("Error writing sector %d\r\n", i);
                 return false;
             }
             offset += 128;
@@ -350,8 +408,13 @@ bool MediaTypeATR::create(FILE *f, uint16_t sectorSize, uint16_t numSectors)
 
     // Write the rest of the sectors via sparse seek to the last sector
     offset += (numSectors * sectorSize) - sectorSize;
+#ifdef ESP_PLATFORM
     fseek(f, offset, SEEK_SET);
     size_t out = fwrite(blank, 1, sectorSize, f);
+#else
+    f->seek(offset, SEEK_SET);
+    size_t out = f->write(blank, 1, sectorSize);
+#endif
 
     if (out != sectorSize)
     {
diff --git a/lib/media/atari/diskTypeXex.cpp b/lib/media/atari/diskTypeXex.cpp
index 762b86c69..5b8679035 100755
--- a/lib/media/atari/diskTypeXex.cpp
+++ b/lib/media/atari/diskTypeXex.cpp
@@ -3,6 +3,8 @@
 #include "diskTypeXex.h"
 
 #include <cstring>
+#include <stdlib.h>
+#include <memory.h>
 
 #include "../../include/debug.h"
 
@@ -174,13 +176,21 @@ bool MediaTypeXEX::read(uint16_t sectornum, uint16_t *readcount)
     if (sectornum != _disk_last_sector + 1)
     {
         Debug_printf("seeking to offset %d in XEX\r\n", xex_offset);
+#ifdef ESP_PLATFORM
         err = fseek(_disk_fileh, xex_offset, SEEK_SET) != 0;
+#else
+        err = _disk_fileh->seek(xex_offset, SEEK_SET) != 0;
+#endif
     }
 
     if (err == false)
     {
         Debug_printf("requesting %d bytes from XEX\r\n", data_bytes);
+#ifdef ESP_PLATFORM
         int read = fread(_disk_sectorbuff, 1, data_bytes, _disk_fileh);
+#else
+        int read = _disk_fileh->read(_disk_sectorbuff, 1, data_bytes);
+#endif
         Debug_printf("received %d bytes\r\n", read);
 
         // Fill in the sector link data pointing to the next sector
@@ -225,7 +235,11 @@ MediaTypeXEX::~MediaTypeXEX()
     unmount();
 }
 
+#ifdef ESP_PLATFORM
 mediatype_t MediaTypeXEX::mount(FILE *f, uint32_t disksize)
+#else
+mediatype_t MediaTypeXEX::mount(FileHandler *f, uint32_t disksize)
+#endif
 {
     Debug_print("XEX MOUNT\r\n");
 
diff --git a/pc_merge_notes.md b/pc_merge_notes.md
index 9cbd0a9f2..34bb5450b 100644
--- a/pc_merge_notes.md
+++ b/pc_merge_notes.md
@@ -292,19 +292,13 @@
 
 - TODO: lib/media/apple/mediaTypeWOZ.h lib/media/apple/mediaTypeWOZ.cpp
 
-- **WIP**: lib/media/atari/diskType.h lib/media/atari/diskType.cpp
+- **DONE** / merge: lib/media/atari/diskType.h lib/media/atari/diskType.cpp
 
-    diskType.h
-
-- **WIP**: lib/media/atari/diskTypeAtr.h lib/media/atari/diskTypeAtr.cpp
-
-    diskTypeAtr.h
+- **DONE** / merge: lib/media/atari/diskTypeAtr.h lib/media/atari/diskTypeAtr.cpp
 
 - **DONE** / merge: lib/media/atari/diskTypeAtx.h
 
-- **WIP**: lib/media/atari/diskTypeXex.h lib/media/atari/diskTypeXex.cpp
-
-    diskTypeXex.h
+- **DONE** / merge: lib/media/atari/diskTypeXex.h lib/media/atari/diskTypeXex.cpp
 
 - **DONE** / identical: lib/base64/base64.h lib/base64/base64.c