diff --git a/assets/disk0/tvdos/TVDOS.SYS b/assets/disk0/tvdos/TVDOS.SYS
index 653576a..046f461 100644
--- a/assets/disk0/tvdos/TVDOS.SYS
+++ b/assets/disk0/tvdos/TVDOS.SYS
@@ -548,20 +548,21 @@ Object.freeze(_TVDOS.DRV.FS.DEVCON)
 
 _TVDOS.DRV.FS.DEVFBIPF = {}
 
-_TVDOS.DRV.FS.DEVFBIPF.pwrite = (fd, ptr, _1, _2) => {
-    let decodefun = ([graphics.decodeIpf1, graphics.decodeIpf2])[sys.peek(ptr + 13)]
-    // offset 24..27: gzipped size
-    let width = sys.peek(ptr+8) | (sys.peek(ptr+9) << 8)
-    let height = sys.peek(ptr+10) | (sys.peek(ptr+11) << 8)
-    let hasAlpha = (sys.peek(12) != 0)
+_TVDOS.DRV.FS.DEVFBIPF.pwrite = (fd, infilePtr, count, _2) => {
+    let decodefun = ([graphics.decodeIpf1, graphics.decodeIpf2])[sys.peek(infilePtr + 13)]
+    let width = sys.peek(infilePtr+8) | (sys.peek(infilePtr+9) << 8)
+    let height = sys.peek(infilePtr+10) | (sys.peek(infilePtr+11) << 8)
+    let hasAlpha = (sys.peek(infilePtr+12) != 0)
+    let ipfType = sys.peek(infilePtr+13)
+    let imgLen = sys.peek(infilePtr+24) | (sys.peek(infilePtr+25) << 8) | (sys.peek(infilePtr+26) << 16) | (sys.peek(infilePtr+27) << 24)
 
-//    println("Calling GPU")
-    decodefun(ptr + 24, -1048577, -1310721, width, height, hasAlpha)
+    let ipfbuf = sys.malloc(imgLen)
+    gzip.decompFromTo(infilePtr + 28, count - 28, ipfbuf) // should return FBUF_SIZE
 
-//    println("Changing graphics mode")
     graphics.setGraphicsMode(4)
+    decodefun(ipfbuf, -1048577, -1310721, width, height, hasAlpha)
 
-//    println("cya!")
+    sys.free(ipfbuf)
 }
 _TVDOS.DRV.FS.DEVFBIPF.bwrite = (fd, bytes) => {
     // TODO pread the file
diff --git a/assets/disk0/tvdos/bin/decodeipf.js b/assets/disk0/tvdos/bin/decodeipf.js
index b29eb01..d24b531 100644
--- a/assets/disk0/tvdos/bin/decodeipf.js
+++ b/assets/disk0/tvdos/bin/decodeipf.js
@@ -26,7 +26,12 @@ if (!magicMatching) {
 }
 
 // decode input image
-let width = sys.peek(infilePtr+8) | (sys.peek(infilePtr+9) << 8)
+let ipfFile = files.open("FBIPF")
+graphics.clearText(); graphics.clearPixels(0); graphics.clearPixels2(0)
+ipfFile.pwrite(infilePtr, infile.size, 0)
+sys.free(infilePtr)
+
+/*let width = sys.peek(infilePtr+8) | (sys.peek(infilePtr+9) << 8)
 let height = sys.peek(infilePtr+10) | (sys.peek(infilePtr+11) << 8)
 let hasAlpha = (sys.peek(infilePtr+12) != 0)
 let ipfType = sys.peek(infilePtr+13)
@@ -44,4 +49,4 @@ graphics.setGraphicsMode(4)
 graphics.clearText(); graphics.clearPixels(0); graphics.clearPixels2(0)
 decodefun(ipfbuf, -1048577, -1310721, width, height, hasAlpha)
 
-sys.free(ipfbuf)
\ No newline at end of file
+sys.free(ipfbuf)*/
\ No newline at end of file
diff --git a/assets/disk0/tvdos/bin/encodeipf.js b/assets/disk0/tvdos/bin/encodeipf.js
index ee799a9..c4e2e90 100644
--- a/assets/disk0/tvdos/bin/encodeipf.js
+++ b/assets/disk0/tvdos/bin/encodeipf.js
@@ -8,10 +8,8 @@ let noalpha = exec_args[4] != undefined && exec_args[4].toLowerCase() == "/noalp
 let infile = files.open(_G.shell.resolvePathInput(exec_args[2]).full)
 let outfile = files.open(_G.shell.resolvePathInput(exec_args[3]).full)
 
-let ipfType = exec_args[1]|0
-let encodefun = undefined
-if (1 == exec_args[1]) encodefun = graphics.encodeIpf1
-if (2 == exec_args[1]) encodefun = graphics.encodeIpf2
+let ipfType = (exec_args[1]|0) - 1
+let encodefun = ([graphics.decodeIpf1, graphics.decodeIpf2])[ipfType]
 if (encodefun === undefined) throw Error(`Unknown IPF format: ${exec_args[1]}`)
 
 // read input file
@@ -25,7 +23,7 @@ let hasAlpha = (4 == channels) && !noalpha
 
 // encode image
 let ipfBlockCount = Math.ceil(imgw / 4.0) * Math.ceil(imgh / 4.0)
-let ipfSizePerBlock = 12 + 4*(ipfType - 1) + 8*hasAlpha
+let ipfSizePerBlock = 12 + 4*(ipfType) + 8*hasAlpha
 let ipfRawSize = ipfSizePerBlock * ipfBlockCount
 let ipfarea = sys.malloc(ipfRawSize)
 let gzippedImage = sys.malloc(28 + ipfRawSize+8) // ipf file header + somewhat arbitrary number. Get the actual count using 28+gzlen
diff --git a/assets/disk0/ycocg.ipf1 b/assets/disk0/ycocg.ipf1
index 9925ccf..ae064fa 100644
Binary files a/assets/disk0/ycocg.ipf1 and b/assets/disk0/ycocg.ipf1 differ
diff --git a/assets/disk0/ycocg.ipf2 b/assets/disk0/ycocg.ipf2
index 297f363..4755322 100644
Binary files a/assets/disk0/ycocg.ipf2 and b/assets/disk0/ycocg.ipf2 differ
diff --git a/assets/disk0/ycocg2.ipf1 b/assets/disk0/ycocg2.ipf1
index 4b7a0dc..34384a2 100644
Binary files a/assets/disk0/ycocg2.ipf1 and b/assets/disk0/ycocg2.ipf1 differ
diff --git a/assets/disk0/ycocg2.ipf2 b/assets/disk0/ycocg2.ipf2
index 9d24f5c..052ea24 100644
Binary files a/assets/disk0/ycocg2.ipf2 and b/assets/disk0/ycocg2.ipf2 differ