diff --git a/assets/disk0/barns.png b/assets/disk0/barns.png
new file mode 100644
index 0000000..fc4ce49
Binary files /dev/null and b/assets/disk0/barns.png differ
diff --git a/assets/disk0/decodeipf.js b/assets/disk0/decodeipf.js
deleted file mode 100644
index d77e766..0000000
--- a/assets/disk0/decodeipf.js
+++ /dev/null
@@ -1,255 +0,0 @@
-if (!exec_args[1]) {
-    printerrln("Usage: decodeipf input.ipf")
-    return 1
-}
-
-let filename = exec_args[1]
-
-const MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46]
-const port = filesystem._toPorts("A")[0]
-
-
-com.sendMessage(port, "DEVRST\x17")
-com.sendMessage(port, `OPENR"${filename}",1`)
-let statusCode = com.getStatusCode(port)
-
-if (statusCode != 0) {
-    printerrln(`No such file (${statusCode})`)
-    return statusCode
-}
-
-com.sendMessage(port, "READ")
-statusCode = com.getStatusCode(port)
-if (statusCode != 0) {
-    printerrln("READ failed with "+statusCode)
-    return statusCode
-}
-
-con.clear(); con.curs_set(0)
-
-let readCount = 0
-
-function readBytes(length) {
-    let ptr = sys.malloc(length)
-    let requiredBlocks = Math.floor((readCount + length) / 4096) - Math.floor(readCount / 4096)
-
-    let completedReads = 0
-
-    //serial.println(`readBytes(${length}); readCount = ${readCount}`)
-
-    for (let bc = 0; bc < requiredBlocks + 1; bc++) {
-        if (completedReads >= length) break
-
-        if (readCount % 4096 == 0) {
-            //serial.println("READ from serial")
-            // pull the actual message
-            sys.poke(-4093 - port, 6);sys.sleep(0) // spinning is required as Graal run is desynced with the Java side
-
-            let blockTransferStatus = ((sys.peek(-4085 - port*2) & 255) | ((sys.peek(-4086 - port*2) & 255) << 8))
-            let thisBlockLen = blockTransferStatus & 4095
-            if (thisBlockLen == 0) thisBlockLen = 4096 // [1, 4096]
-            let hasMore = (blockTransferStatus & 0x8000 != 0)
-
-
-            //serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - k) & 255).toString(16).padStart(2,'0')).join()}]`)
-
-            let remaining = Math.min(thisBlockLen, length - completedReads)
-
-            //serial.println(`Pulled a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}, remaining = ${remaining}`)
-
-            // copy from read buffer to designated position
-            sys.memcpy(-4097, ptr + completedReads, remaining)
-
-            // increment readCount properly
-            readCount += remaining
-            completedReads += remaining
-        }
-        else {
-            let padding = readCount % 4096
-            let remaining = length - completedReads
-            let thisBlockLen = Math.min(4096 - padding, length - completedReads)
-
-            //serial.println(`padding = ${padding}; remaining = ${remaining}`)
-
-            //serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - padding - k) & 255).toString(16).padStart(2,'0')).join()}]`)
-
-            //serial.println(`Reusing a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}`)
-
-            // copy from read buffer to designated position
-            sys.memcpy(-4097 - padding, ptr + completedReads, thisBlockLen)
-
-            // increment readCount properly
-            readCount += thisBlockLen
-            completedReads += thisBlockLen
-        }
-    }
-
-    //serial.println(`END readBytes(${length}); readCount = ${readCount}\n`)
-
-    return ptr
-}
-
-function readInt() {
-    let b = readBytes(4)
-    let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8) | ((sys.peek(b+2) & 255) << 16) | ((sys.peek(b+3) & 255) << 24)
-
-    //serial.println(`readInt(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)}, ${sys.peek(b+2)}, ${sys.peek(b+3)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-function readShort() {
-    let b = readBytes(2)
-    let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8)
-
-    //serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-function readByte() {
-    let b = readBytes(1)
-    let i = (sys.peek(b) & 255)
-
-    //serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-
-let magic = readBytes(8)
-let magicMatching = true
-
-// check if magic number matches
-MAGIC.forEach((b,i) => {
-    let testb = sys.peek(magic + i) & 255 // for some reason this must be located here
-    if (testb != b) {
-        magicMatching = false
-    }
-})
-sys.free(magic)
-if (!magicMatching) {
-    println("Not an IPF file (MAGIC mismatch)")
-    return 1
-}
-
-let imgw = readShort()
-let imgh = readShort()
-let hasAlpha = (readShort() != 0)
-sys.free(readBytes(10)) // skip 10 bytes
-
-// TODO: gzip
-
-function clampRGB(f) {
-    return (f > 1.0) ? 1.0 : (f < 0.0) ? 0.0 : f
-}
-
-function ycocgToRGB(co, cg, ys, as) { // ys: 4 Y-values
-    // return [R1|G1, B1|A1, R2|G2, B2|A2, R3|G3, B3|A3, R4|G4, B4|A4]
-
-//    cocg = 0x7777
-//    ys = 0x7777
-
-    co = (co - 7) / 8.0
-    cg = (cg - 7) / 8.0
-
-    let y1 = (ys & 15) / 15.0
-    let a1 = as & 15
-    let tmp = y1 - cg / 2.0
-    let g1 = clampRGB(cg + tmp)
-    let b1 = clampRGB(tmp - co / 2.0)
-    let r1 = clampRGB(b1 + co)
-
-    let y2 = ((ys >>> 4) & 15) / 15.0
-    let a2 = (as >>> 4) & 15
-    tmp = y2 - cg / 2.0
-    let g2 = clampRGB(cg + tmp)
-    let b2 = clampRGB(tmp - co / 2.0)
-    let r2 = clampRGB(b2 + co)
-
-    let y3 = ((ys >>> 8) & 15) / 15.0
-    let a3 = (as >>> 8) & 15
-    tmp = y3 - cg / 2.0
-    let g3 = clampRGB(cg + tmp)
-    let b3 = clampRGB(tmp - co / 2.0)
-    let r3 = clampRGB(b3 + co)
-
-    let y4 = ((ys >>> 12) & 15) / 15.0
-    let a4 = (as >>> 12) & 15
-    tmp = y4 - cg / 2.0
-    let g4 = clampRGB(cg + tmp)
-    let b4 = clampRGB(tmp - co / 2.0)
-    let r4 = clampRGB(b4 + co)
-
-    return [
-        (Math.round(r1 * 15) << 4) | Math.round(g1 * 15),
-        (Math.round(b1 * 15) << 4) | a1,
-        (Math.round(r2 * 15) << 4) | Math.round(g2 * 15),
-        (Math.round(b2 * 15) << 4) | a2,
-        (Math.round(r3 * 15) << 4) | Math.round(g3 * 15),
-        (Math.round(b3 * 15) << 4) | a3,
-        (Math.round(r4 * 15) << 4) | Math.round(g4 * 15),
-        (Math.round(b4 * 15) << 4) | a4,
-    ]
-}
-
-graphics.setGraphicsMode(4)
-
-for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
-for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
-    let rg = new Uint8Array(16) // [R1G1, R2G2, R3G3, R4G4, ...]
-    let ba = new Uint8Array(16)
-
-    let co = readShort()
-    let cg = readShort()
-    let y1 = readShort()
-    let y2 = readShort()
-    let y3 = readShort()
-    let y4 = readShort()
-
-    let a1 = 65535; let a2 = 65535; let a3 = 65535; let a4 = 65535
-
-    if (hasAlpha) {
-        a1 = readShort()
-        a2 = readShort()
-        a3 = readShort()
-        a4 = readShort()
-    }
-
-    let corner = ycocgToRGB(co & 15, cg & 15, y1, a1)
-    rg[0] = corner[0];ba[0] = corner[1]
-    rg[1] = corner[2];ba[1] = corner[3]
-    rg[4] = corner[4];ba[4] = corner[5]
-    rg[5] = corner[6];ba[5] = corner[7]
-
-    corner = ycocgToRGB((co >> 4) & 15, (cg >> 4) & 15, y2, a2)
-    rg[2] = corner[0];ba[2] = corner[1]
-    rg[3] = corner[2];ba[3] = corner[3]
-    rg[6] = corner[4];ba[6] = corner[5]
-    rg[7] = corner[6];ba[7] = corner[7]
-
-    corner = ycocgToRGB((co >> 8) & 15, (cg >> 8) & 15, y3, a3)
-    rg[8] = corner[0];ba[8] = corner[1]
-    rg[9] = corner[2];ba[9] = corner[3]
-    rg[12] = corner[4];ba[12] = corner[5]
-    rg[13] = corner[6];ba[13] = corner[7]
-
-    corner = ycocgToRGB((co >> 12) & 15, (cg >> 12) & 15, y4, a4)
-    rg[10] = corner[0];ba[10] = corner[1]
-    rg[11] = corner[2];ba[11] = corner[3]
-    rg[14] = corner[4];ba[14] = corner[5]
-    rg[15] = corner[6];ba[15] = corner[7]
-
-
-    // move decoded pixels into memory
-    for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
-        let ox = blockX * 4 + px
-        let oy = blockY * 4 + py
-        let offset = oy * 560 + ox
-        sys.poke(-1048577 - offset, rg[py * 4 + px])
-        sys.poke(-1310721 - offset, ba[py * 4 + px])
-    }}
-}}
diff --git a/assets/disk0/decodeipf2.js b/assets/disk0/decodeipf2.js
deleted file mode 100644
index b2906fc..0000000
--- a/assets/disk0/decodeipf2.js
+++ /dev/null
@@ -1,257 +0,0 @@
-if (!exec_args[1]) {
-    printerrln("Usage: decodeipf input.ipf")
-    return 1
-}
-
-let filename = exec_args[1]
-
-const MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46]
-const port = filesystem._toPorts("A")[0]
-
-
-com.sendMessage(port, "DEVRST\x17")
-com.sendMessage(port, `OPENR"${filename}",1`)
-let statusCode = com.getStatusCode(port)
-
-if (statusCode != 0) {
-    printerrln(`No such file (${statusCode})`)
-    return statusCode
-}
-
-com.sendMessage(port, "READ")
-statusCode = com.getStatusCode(port)
-if (statusCode != 0) {
-    printerrln("READ failed with "+statusCode)
-    return statusCode
-}
-
-con.clear(); con.curs_set(0)
-
-let readCount = 0
-
-function readBytes(length) {
-    let ptr = sys.malloc(length)
-    let requiredBlocks = Math.floor((readCount + length) / 4096) - Math.floor(readCount / 4096)
-
-    let completedReads = 0
-
-    //serial.println(`readBytes(${length}); readCount = ${readCount}`)
-
-    for (let bc = 0; bc < requiredBlocks + 1; bc++) {
-        if (completedReads >= length) break
-
-        if (readCount % 4096 == 0) {
-            //serial.println("READ from serial")
-            // pull the actual message
-            sys.poke(-4093 - port, 6);sys.sleep(0) // spinning is required as Graal run is desynced with the Java side
-
-            let blockTransferStatus = ((sys.peek(-4085 - port*2) & 255) | ((sys.peek(-4086 - port*2) & 255) << 8))
-            let thisBlockLen = blockTransferStatus & 4095
-            if (thisBlockLen == 0) thisBlockLen = 4096 // [1, 4096]
-            let hasMore = (blockTransferStatus & 0x8000 != 0)
-
-
-            //serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - k) & 255).toString(16).padStart(2,'0')).join()}]`)
-
-            let remaining = Math.min(thisBlockLen, length - completedReads)
-
-            //serial.println(`Pulled a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}, remaining = ${remaining}`)
-
-            // copy from read buffer to designated position
-            sys.memcpy(-4097, ptr + completedReads, remaining)
-
-            // increment readCount properly
-            readCount += remaining
-            completedReads += remaining
-        }
-        else {
-            let padding = readCount % 4096
-            let remaining = length - completedReads
-            let thisBlockLen = Math.min(4096 - padding, length - completedReads)
-
-            //serial.println(`padding = ${padding}; remaining = ${remaining}`)
-
-            //serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - padding - k) & 255).toString(16).padStart(2,'0')).join()}]`)
-
-            //serial.println(`Reusing a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}`)
-
-            // copy from read buffer to designated position
-            sys.memcpy(-4097 - padding, ptr + completedReads, thisBlockLen)
-
-            // increment readCount properly
-            readCount += thisBlockLen
-            completedReads += thisBlockLen
-        }
-    }
-
-    //serial.println(`END readBytes(${length}); readCount = ${readCount}\n`)
-
-    return ptr
-}
-
-function readInt() {
-    let b = readBytes(4)
-    let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8) | ((sys.peek(b+2) & 255) << 16) | ((sys.peek(b+3) & 255) << 24)
-
-    //serial.println(`readInt(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)}, ${sys.peek(b+2)}, ${sys.peek(b+3)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-function readShort() {
-    let b = readBytes(2)
-    let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8)
-
-    //serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-function readByte() {
-    let b = readBytes(1)
-    let i = (sys.peek(b) & 255)
-
-    //serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-
-let magic = readBytes(8)
-let magicMatching = true
-
-// check if magic number matches
-MAGIC.forEach((b,i) => {
-    let testb = sys.peek(magic + i) & 255 // for some reason this must be located here
-    if (testb != b) {
-        magicMatching = false
-    }
-})
-sys.free(magic)
-if (!magicMatching) {
-    println("Not an IPF file (MAGIC mismatch)")
-    return 1
-}
-
-let imgw = readShort()
-let imgh = readShort()
-let hasAlpha = (readShort() != 0)
-sys.free(readBytes(10)) // skip 10 bytes
-
-// TODO: gzip
-
-function clampRGB(f) {
-    return (f > 1.0) ? 1.0 : (f < 0.0) ? 0.0 : f
-}
-
-function ycocgToRGB(co1, co2, cg1, cg2, ys, as) { // ys: 4 Y-values
-    // return [R1|G1, B1|A1, R2|G2, B2|A2, R3|G3, B3|A3, R4|G4, B4|A4]
-
-//    cocg = 0x7777
-//    ys = 0x7777
-
-    co1 = (co1 - 7) / 8.0
-    co2 = (co2 - 7) / 8.0
-    cg1 = (cg1 - 7) / 8.0
-    cg2 = (cg2 - 7) / 8.0
-
-    let y1 = (ys & 15) / 15.0
-    let a1 = as & 15
-    let tmp = y1 - cg1 / 2.0
-    let g1 = clampRGB(cg1 + tmp)
-    let b1 = clampRGB(tmp - co1 / 2.0)
-    let r1 = clampRGB(b1 + co1)
-
-    let y2 = ((ys >>> 4) & 15) / 15.0
-    let a2 = (as >>> 4) & 15
-    tmp = y2 - cg1 / 2.0
-    let g2 = clampRGB(cg1 + tmp)
-    let b2 = clampRGB(tmp - co1 / 2.0)
-    let r2 = clampRGB(b2 + co1)
-
-    let y3 = ((ys >>> 8) & 15) / 15.0
-    let a3 = (as >>> 8) & 15
-    tmp = y3 - cg2 / 2.0
-    let g3 = clampRGB(cg2 + tmp)
-    let b3 = clampRGB(tmp - co2 / 2.0)
-    let r3 = clampRGB(b3 + co2)
-
-    let y4 = ((ys >>> 12) & 15) / 15.0
-    let a4 = (as >>> 12) & 15
-    tmp = y4 - cg2 / 2.0
-    let g4 = clampRGB(cg2 + tmp)
-    let b4 = clampRGB(tmp - co2 / 2.0)
-    let r4 = clampRGB(b4 + co2)
-
-    return [
-        (Math.round(r1 * 15) << 4) | Math.round(g1 * 15),
-        (Math.round(b1 * 15) << 4) | a1,
-        (Math.round(r2 * 15) << 4) | Math.round(g2 * 15),
-        (Math.round(b2 * 15) << 4) | a2,
-        (Math.round(r3 * 15) << 4) | Math.round(g3 * 15),
-        (Math.round(b3 * 15) << 4) | a3,
-        (Math.round(r4 * 15) << 4) | Math.round(g4 * 15),
-        (Math.round(b4 * 15) << 4) | a4,
-    ]
-}
-
-graphics.setGraphicsMode(4)
-
-for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
-for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
-    let rg = new Uint8Array(16) // [R1G1, R2G2, R3G3, R4G4, ...]
-    let ba = new Uint8Array(16)
-
-    let co = readInt()
-    let cg = readInt()
-    let y1 = readShort()
-    let y2 = readShort()
-    let y3 = readShort()
-    let y4 = readShort()
-
-    let a1 = 65535; let a2 = 65535; let a3 = 65535; let a4 = 65535
-
-    if (hasAlpha) {
-        a1 = readShort()
-        a2 = readShort()
-        a3 = readShort()
-        a4 = readShort()
-    }
-
-    let corner = ycocgToRGB(co & 15, (co >> 8) & 15, cg & 15, (cg >> 8) & 15, y1, a1)
-    rg[0] = corner[0];ba[0] = corner[1]
-    rg[1] = corner[2];ba[1] = corner[3]
-    rg[4] = corner[4];ba[4] = corner[5]
-    rg[5] = corner[6];ba[5] = corner[7]
-
-    corner = ycocgToRGB((co >> 4) & 15, (co >> 12) & 15, (cg >> 4) & 15, (cg >> 12) & 15, y2, a2)
-    rg[2] = corner[0];ba[2] = corner[1]
-    rg[3] = corner[2];ba[3] = corner[3]
-    rg[6] = corner[4];ba[6] = corner[5]
-    rg[7] = corner[6];ba[7] = corner[7]
-
-    corner = ycocgToRGB((co >> 16) & 15, (co >> 24) & 15, (cg >> 16) & 15, (cg >> 24) & 15, y3, a3)
-    rg[8] = corner[0];ba[8] = corner[1]
-    rg[9] = corner[2];ba[9] = corner[3]
-    rg[12] = corner[4];ba[12] = corner[5]
-    rg[13] = corner[6];ba[13] = corner[7]
-
-    corner = ycocgToRGB((co >> 20) & 15, (co >> 28) & 15, (cg >> 20) & 15, (cg >> 28) & 15, y4, a4)
-    rg[10] = corner[0];ba[10] = corner[1]
-    rg[11] = corner[2];ba[11] = corner[3]
-    rg[14] = corner[4];ba[14] = corner[5]
-    rg[15] = corner[6];ba[15] = corner[7]
-
-
-    // move decoded pixels into memory
-    for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
-        let ox = blockX * 4 + px
-        let oy = blockY * 4 + py
-        let offset = oy * 560 + ox
-        sys.poke(-1048577 - offset, rg[py * 4 + px])
-        sys.poke(-1310721 - offset, ba[py * 4 + px])
-    }}
-}}
diff --git a/assets/disk0/encodeipf.js b/assets/disk0/encodeipf.js
deleted file mode 100644
index 96ada6a..0000000
--- a/assets/disk0/encodeipf.js
+++ /dev/null
@@ -1,244 +0,0 @@
-/*
-TSVM Interchangeable Picture Format
-
-Image is divided into 4x4 blocks and each block is serialised, then the entire file is gzipped
-
-
-# File Structure
-\x1F T S V M i P F
-[HEADER]
-[Blocks.gz]
-
-- Header
-    uint16 WIDTH
-    uint16 HEIGHT
-    uint16 HAS ALPHA
-    uint8  0 (IPF CONFIG INDICATOR)
-    byte[9] RESERVED
-
-- *.gz
-    uint32 UNCOMPRESSED SIZE
-    *      PAYLOAD
-
-- Blocks
-    4x4 pixels are sampled, then divided into YCoCg planes.
-    CoCg planes are "chroma subsampled" by 4:2:0, then quantised to 4 bits (8 bits for CoCg combined)
-    Y plane is quantised to 4 bits
-
-    By doing so, CoCg planes will reduce to 4 pixels
-    For the description of packing, pixels in Y plane will be numbered as:
-        0 1 2 3
-        4 5 6 7
-        8 9 A B
-        C D E F
-
-    Bits are packed like so:
-
-    uint32 SUBSAMPLING MASK (unimplemented; dont write this)
-    uint8 [Co-Top Right | Co-Top Left]
-    uint8 [Co-Bottom Right | Co-Bottom Left]
-    uint8 [Cg-Top Right | Cg-Top Left]
-    uint8 [Cg-Bottom Right | Cg-Bottom Left]
-    uint16 [Y1 | Y0 | Y5 | Y4]
-    uint16 [Y3 | Y2 | Y7 | Y6]
-    uint16 [Y9 | Y8 | YD | YC]
-    uint16 [YB | YA | YF | YE]
-    (total: 12 bytes)
-
-    If has alpha, append following bytes for alpha values
-    uint16 [a1 | a0 | a5 | a4]
-    uint16 [a3 | a2 | a7 | a6]
-    uint16 [a9 | a8 | aD | aC]
-    uint16 [aB | aA | aF | aE]
-    (total: 20 bytes)
-
-    Subsampling mask:
-
-    Least significant byte for top-left, most significant for bottom-right
-    For example, this default pattern
-
-    00 00 01 01
-    00 00 01 01
-    10 10 11 11
-    10 10 11 11
-
-    turns into:
-
-    01010000 -> 0x30
-    01010000 -> 0x30
-    11111010 -> 0xFA
-    11111010 -> 0xFA
-
-    which packs into: [ 30 | 30 | FA | FA ] (because little endian)
-
-- IPF CONFIG INDICATOR:
-
-    0 for 4:2:0 Chroma subsampling for both Co and Cg (iPF Type 1)
-    1 for 4:2:2 Chroma subsampling for Co, but 4:2:0 for Cg (NOT recommended; unused)
-    2 for 4:2:2 Chroma subsampling for Cg, but 4:2:0 for Co (Recommended over type 1; unused)
-    3 for 4:2:2 Chroma subsampling for both Co and Cg (iPF Type 2)
-
- */
-
-if (!exec_args[2]) {
-    printerrln("Usage: encodeipf input.jpg output.ipf [/noalpha]")
-    return 1
-}
-
-let configUseAlpha = !(exec_args[3] != undefined && exec_args[3].toLowerCase() == "/noalpha")
-
-let pattern = 0
-
-filesystem.open("A", exec_args[1], "R")
-
-let status = com.getStatusCode(0)
-let infile = undefined
-if (0 != status) return status
-
-// read file
-let fileLen = filesystem.getFileLen("A")
-infile = sys.malloc(fileLen)
-dma.comToRam(0, 0, infile, fileLen)
-
-// decode
-const [imgw, imgh, channels, imageData] = graphics.decodeImage(infile, fileLen) // stored as [R | G | B | (A)]
-sys.free(infile)
-let hasAlpha = (4 == channels) && configUseAlpha
-let outBlock = sys.malloc(64)
-let blockSize = Math.ceil(imgh / 4.0) * Math.ceil(imgw / 4.0)
-let blockWidth = Math.ceil(imgw / 4.0)
-
-println(`Dim: ${imgw}x${imgh}, channels: ${channels}, Has alpha: ${hasAlpha}`)
-
-// TODO write output to dedicated ptr and gzip it
-let writeCount = 0
-let writeBuf = sys.malloc(blockSize * ((hasAlpha) ? 20 : 12))
-
-let bayerKernels = [
-    [
-        0,8,2,10,
-        12,4,14,6,
-        3,11,1,9,
-        15,7,13,5,
-    ],
-    [
-        8,2,10,0,
-        4,14,6,12,
-        11,1,9,3,
-        7,13,5,15,
-    ],
-    [
-        7,13,5,15,
-        8,2,10,0,
-        4,14,6,12,
-        11,1,9,3,
-    ],
-    [
-        15,7,13,5,
-        0,8,2,10,
-        12,4,14,6,
-        3,11,1,9,
-    ]
-].map(it => it.map(it => (it + 0.5) / 16))
-
-function chromaToFourBits(f) {
-    let r = Math.round(f * 8) + 7
-    return (r < 0) ? 0 : (r > 15) ? 15 : r
-}
-
-for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
-for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
-//    println(`Encoding block ${1 + blockY * blockWidth + blockX}/${blockSize}`) // print statement is making things slower...
-
-    let ys = new Uint8Array(16)
-    let as = new Uint8Array(16)
-    let cos = new Float32Array(16)
-    let cgs = new Float32Array(16)
-
-    for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
-        // TODO oob-check
-        let ox = blockX * 4 + px
-        let oy = blockY * 4 + py
-        let t = bayerKernels[pattern % bayerKernels.length][4 * (py % 4) + (px % 4)]
-        let offset = channels * (oy * imgw + ox)
-
-        let r0 = sys.peek(imageData + offset) / 255.0
-        let g0 = sys.peek(imageData + offset+1) / 255.0
-        let b0 = sys.peek(imageData + offset+2) / 255.0
-        let a0 = (hasAlpha) ? sys.peek(imageData + offset+3) / 255.0 : 1.0
-
-        let r = Math.floor((t / 15 + r0) * 15) / 15
-        let g = Math.floor((t / 15 + g0) * 15) / 15
-        let b = Math.floor((t / 15 + b0) * 15) / 15
-        let a = Math.floor((t / 15 + a0) * 15) / 15
-
-        let co = r - b // [-1..1]
-        let tmp = b + co / 2.0
-        let cg = g - tmp // [-1..1]
-        let y = tmp + cg / 2.0 // [0..1]
-
-        let index = py * 4 + px
-        ys[index] = Math.round(y * 15)
-        as[index] = Math.round(a * 15)
-        cos[index] = co
-        cgs[index] = cg
-    }}
-
-    // subsample by averaging
-    let cos1 = chromaToFourBits((cos[0]+cos[1]+cos[4]+cos[5]) / 4.0)
-    let cos2 = chromaToFourBits((cos[2]+cos[3]+cos[6]+cos[7]) / 4.0)
-    let cos3 = chromaToFourBits((cos[8]+cos[9]+cos[12]+cos[13]) / 4.0)
-    let cos4 = chromaToFourBits((cos[10]+cos[11]+cos[14]+cos[15]) / 4.0)
-    let cgs1 = chromaToFourBits((cgs[0]+cgs[1]+cgs[4]+cgs[5]) / 4.0)
-    let cgs2 = chromaToFourBits((cgs[2]+cgs[3]+cgs[6]+cgs[7]) / 4.0)
-    let cgs3 = chromaToFourBits((cgs[8]+cgs[9]+cgs[12]+cgs[13]) / 4.0)
-    let cgs4 = chromaToFourBits((cgs[10]+cgs[11]+cgs[14]+cgs[15]) / 4.0)
-
-    // append encoded blocks to the file
-    let outBlock = writeBuf + writeCount
-
-    sys.poke(outBlock+ 0, (cos2 << 4) | cos1)
-    sys.poke(outBlock+ 1, (cos4 << 4) | cos3)
-    sys.poke(outBlock+ 2, (cgs2 << 4) | cgs1)
-    sys.poke(outBlock+ 3, (cgs4 << 4) | cgs3)
-    sys.poke(outBlock+ 4, (ys[1] << 4) | ys[0])
-    sys.poke(outBlock+ 5, (ys[5] << 4) | ys[4])
-    sys.poke(outBlock+ 6, (ys[3] << 4) | ys[2])
-    sys.poke(outBlock+ 7, (ys[7] << 4) | ys[6])
-    sys.poke(outBlock+ 8, (ys[9] << 4) | ys[8])
-    sys.poke(outBlock+ 9, (ys[13] << 4) | ys[12])
-    sys.poke(outBlock+10, (ys[11] << 4) | ys[10])
-    sys.poke(outBlock+11, (ys[15] << 4) | ys[14])
-
-    if (hasAlpha) {
-        sys.poke(outBlock+12, (as[1] << 4) | as[0])
-        sys.poke(outBlock+13, (as[5] << 4) | as[4])
-        sys.poke(outBlock+14, (as[3] << 4) | as[2])
-        sys.poke(outBlock+15, (as[7] << 4) | as[6])
-        sys.poke(outBlock+16, (as[9] << 4) | as[8])
-        sys.poke(outBlock+17, (as[13] << 4) | as[12])
-        sys.poke(outBlock+18, (as[11] << 4) | as[10])
-        sys.poke(outBlock+19, (as[15] << 4) | as[14])
-        writeCount += 8
-    }
-    writeCount += 12
-
-}}
-
-// write header to the output file
-let headerBytes = [
-    0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46, // magic
-    imgw & 255, (imgw >>> 8) & 255, // width
-    imgh & 255, (imgh >>> 8) & 255, // height
-    ((hasAlpha) ? 1 : 0), 0x00, // has alpha, iPF type 1
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // reserved
-]
-
-filesystem.open("A", exec_args[2], "W")
-filesystem.writeBytes("A", headerBytes)
-filesystem.open("A", exec_args[2], "A")
-dma.ramToCom(writeBuf, 0, writeCount)
-
-sys.free(outBlock)
-sys.free(imageData)
-sys.free(writeBuf)
\ No newline at end of file
diff --git a/assets/disk0/encodeipf2.js b/assets/disk0/encodeipf2.js
deleted file mode 100644
index 243991e..0000000
--- a/assets/disk0/encodeipf2.js
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
-TSVM Interchangeable Picture Format
-
-Image is divided into 4x4 blocks and each block is serialised, then the entire file is gzipped
-
-
-# File Structure
-\x1F T S V M i P F
-[HEADER]
-[Blocks.gz]
-
-- Header
-    uint16 WIDTH
-    uint16 HEIGHT
-    uint16 HAS ALPHA
-    uint8  3 (IPF CONFIG INDICATOR)
-    byte[9] RESERVED
-
-- *.gz
-    uint32 UNCOMPRESSED SIZE
-    *      PAYLOAD
-
-- Blocks
-    4x4 pixels are sampled, then divided into YCoCg planes.
-    CoCg planes are "chroma subsampled" by 4:2:0, then quantised to 4 bits (8 bits for CoCg combined)
-    Y plane is quantised to 4 bits
-
-    By doing so, CoCg planes will reduce to 4 pixels
-    For the description of packing, pixels in Y plane will be numbered as:
-        0 1 2 3
-        4 5 6 7
-        8 9 A B
-        C D E F
-
-    Bits are packed like so:
-
-    uint32 SUBSAMPLING MASK (unimplemented; dont write this)
-    uint8 [Co-2 | Co-1]
-    uint8 [Co-4 | Co-3]
-    uint8 [Co-6 | Co-5]
-    uint8 [Co-8 | Co-7]
-    uint8 [Cg-2 | Cg-1]
-    uint8 [Cg-4 | Cg-3]
-    uint8 [Cg-6 | Cg-5]
-    uint8 [Cg-8 | Cg-7]
-    uint16 [Y1 | Y0 | Y5 | Y4]
-    uint16 [Y3 | Y2 | Y7 | Y6]
-    uint16 [Y9 | Y8 | YD | YC]
-    uint16 [YB | YA | YF | YE]
-    (total: 16 bytes)
-
-    If has alpha, append following bytes for alpha values
-    uint16 [a1 | a0 | a5 | a4]
-    uint16 [a3 | a2 | a7 | a6]
-    uint16 [a9 | a8 | aD | aC]
-    uint16 [aB | aA | aF | aE]
-    (total: 24 bytes)
-
-    Subsampling mask:
-
-    Least significant byte for top-left, most significant for bottom-right
-    For example, this default pattern
-
-    00 00 01 01
-    00 00 01 01
-    10 10 11 11
-    10 10 11 11
-
-    turns into:
-
-    01010000 -> 0x30
-    01010000 -> 0x30
-    11111010 -> 0xFA
-    11111010 -> 0xFA
-
-    which packs into: [ 30 | 30 | FA | FA ] (because little endian)
-
-- IPF CONFIG INDICATOR:
-
-    0 for 4:2:0 Chroma subsampling for both Co and Cg (iPF Type 1)
-    1 for 4:2:2 Chroma subsampling for Co, but 4:2:0 for Cg (NOT recommended; unused)
-    2 for 4:2:2 Chroma subsampling for Cg, but 4:2:0 for Co (Recommended over type 1; unused)
-    3 for 4:2:2 Chroma subsampling for both Co and Cg (iPF Type 2)
-
- */
-
-if (!exec_args[2]) {
-    printerrln("Usage: encodeipf input.jpg output.ipf [/noalpha]")
-    return 1
-}
-
-let configUseAlpha = !(exec_args[3] != undefined && exec_args[3].toLowerCase() == "/noalpha")
-
-let pattern = 0
-
-filesystem.open("A", exec_args[1], "R")
-
-let status = com.getStatusCode(0)
-let infile = undefined
-if (0 != status) return status
-
-// read file
-let fileLen = filesystem.getFileLen("A")
-infile = sys.malloc(fileLen)
-dma.comToRam(0, 0, infile, fileLen)
-
-// decode
-const [imgw, imgh, channels, imageData] = graphics.decodeImage(infile, fileLen) // stored as [R | G | B | (A)]
-sys.free(infile)
-let hasAlpha = (4 == channels) && configUseAlpha
-let outBlock = sys.malloc(64)
-let blockSize = Math.ceil(imgh / 4.0) * Math.ceil(imgw / 4.0)
-let blockWidth = Math.ceil(imgw / 4.0)
-
-println(`Dim: ${imgw}x${imgh}, channels: ${channels}, Has alpha: ${hasAlpha}`)
-
-// TODO write output to dedicated ptr and gzip it
-let writeCount = 0
-let writeBuf = sys.malloc(blockSize * ((hasAlpha) ? 24 : 16))
-
-let bayerKernels = [
-    [
-        0,8,2,10,
-        12,4,14,6,
-        3,11,1,9,
-        15,7,13,5,
-    ],
-    [
-        8,2,10,0,
-        4,14,6,12,
-        11,1,9,3,
-        7,13,5,15,
-    ],
-    [
-        7,13,5,15,
-        8,2,10,0,
-        4,14,6,12,
-        11,1,9,3,
-    ],
-    [
-        15,7,13,5,
-        0,8,2,10,
-        12,4,14,6,
-        3,11,1,9,
-    ]
-].map(it => it.map(it => (it + 0.5) / 16))
-
-function chromaToFourBits(f) {
-    let r = Math.round(f * 8) + 7
-    return (r < 0) ? 0 : (r > 15) ? 15 : r
-}
-
-for (let blockY = 0; blockY < Math.ceil(imgh / 4.0); blockY++) {
-for (let blockX = 0; blockX < Math.ceil(imgw / 4.0); blockX++) {
-//    println(`Encoding block ${1 + blockY * blockWidth + blockX}/${blockSize}`) // print statement is making things slower...
-
-    let ys = new Uint8Array(16)
-    let as = new Uint8Array(16)
-    let cos = new Float32Array(16)
-    let cgs = new Float32Array(16)
-
-    for (let py = 0; py < 4; py++) { for (let px = 0; px < 4; px++) {
-        // TODO oob-check
-        let ox = blockX * 4 + px
-        let oy = blockY * 4 + py
-        let t = bayerKernels[pattern % bayerKernels.length][4 * (py % 4) + (px % 4)]
-        let offset = channels * (oy * imgw + ox)
-
-        let r0 = sys.peek(imageData + offset) / 255.0
-        let g0 = sys.peek(imageData + offset+1) / 255.0
-        let b0 = sys.peek(imageData + offset+2) / 255.0
-        let a0 = (hasAlpha) ? sys.peek(imageData + offset+3) / 255.0 : 1.0
-
-        let r = Math.floor((t / 15 + r0) * 15) / 15
-        let g = Math.floor((t / 15 + g0) * 15) / 15
-        let b = Math.floor((t / 15 + b0) * 15) / 15
-        let a = Math.floor((t / 15 + a0) * 15) / 15
-
-        let co = r - b // [-1..1]
-        let tmp = b + co / 2.0
-        let cg = g - tmp // [-1..1]
-        let y = tmp + cg / 2.0 // [0..1]
-
-        let index = py * 4 + px
-        ys[index] = Math.round(y * 15)
-        as[index] = Math.round(a * 15)
-        cos[index] = co
-        cgs[index] = cg
-    }}
-
-    // subsample by averaging
-    let cos1 = chromaToFourBits((cos[0]+cos[1]) / 2.0)
-    let cos2 = chromaToFourBits((cos[2]+cos[3]) / 2.0)
-    let cos3 = chromaToFourBits((cos[4]+cos[5]) / 2.0)
-    let cos4 = chromaToFourBits((cos[6]+cos[7]) / 2.0)
-    let cos5 = chromaToFourBits((cos[8]+cos[9]) / 2.0)
-    let cos6 = chromaToFourBits((cos[10]+cos[11]) / 2.0)
-    let cos7 = chromaToFourBits((cos[12]+cos[13]) / 2.0)
-    let cos8 = chromaToFourBits((cos[14]+cos[15]) / 2.0)
-
-    let cgs1 = chromaToFourBits((cgs[0]+cgs[1]) / 2.0)
-    let cgs2 = chromaToFourBits((cgs[2]+cgs[3]) / 2.0)
-    let cgs3 = chromaToFourBits((cgs[4]+cgs[5]) / 2.0)
-    let cgs4 = chromaToFourBits((cgs[6]+cgs[7]) / 2.0)
-    let cgs5 = chromaToFourBits((cgs[8]+cgs[9]) / 2.0)
-    let cgs6 = chromaToFourBits((cgs[10]+cgs[11]) / 2.0)
-    let cgs7 = chromaToFourBits((cgs[12]+cgs[13]) / 2.0)
-    let cgs8 = chromaToFourBits((cgs[14]+cgs[15]) / 2.0)
-
-
-    // append encoded blocks to the file
-    let outBlock = writeBuf + writeCount
-
-    sys.poke(outBlock+ 0, (cos2 << 4) | cos1)
-    sys.poke(outBlock+ 1, (cos4 << 4) | cos3)
-    sys.poke(outBlock+ 2, (cos6 << 4) | cos5)
-    sys.poke(outBlock+ 3, (cos8 << 4) | cos7)
-    sys.poke(outBlock+ 4, (cgs2 << 4) | cgs1)
-    sys.poke(outBlock+ 5, (cgs4 << 4) | cgs3)
-    sys.poke(outBlock+ 6, (cgs6 << 4) | cgs5)
-    sys.poke(outBlock+ 7, (cgs8 << 4) | cgs7)
-    sys.poke(outBlock+ 8, (ys[1] << 4) | ys[0])
-    sys.poke(outBlock+ 9, (ys[5] << 4) | ys[4])
-    sys.poke(outBlock+10, (ys[3] << 4) | ys[2])
-    sys.poke(outBlock+11, (ys[7] << 4) | ys[6])
-    sys.poke(outBlock+12, (ys[9] << 4) | ys[8])
-    sys.poke(outBlock+13, (ys[13] << 4) | ys[12])
-    sys.poke(outBlock+14, (ys[11] << 4) | ys[10])
-    sys.poke(outBlock+15, (ys[15] << 4) | ys[14])
-
-    if (hasAlpha) {
-        sys.poke(outBlock+16, (as[1] << 4) | as[0])
-        sys.poke(outBlock+17, (as[5] << 4) | as[4])
-        sys.poke(outBlock+18, (as[3] << 4) | as[2])
-        sys.poke(outBlock+19, (as[7] << 4) | as[6])
-        sys.poke(outBlock+20, (as[9] << 4) | as[8])
-        sys.poke(outBlock+21, (as[13] << 4) | as[12])
-        sys.poke(outBlock+22, (as[11] << 4) | as[10])
-        sys.poke(outBlock+23, (as[15] << 4) | as[14])
-        writeCount += 8
-    }
-    writeCount += 16
-
-}}
-
-// write header to the output file
-let headerBytes = [
-    0x1F, 0x54, 0x53, 0x56, 0x4D, 0x69, 0x50, 0x46, // magic
-    imgw & 255, (imgw >>> 8) & 255, // width
-    imgh & 255, (imgh >>> 8) & 255, // height
-    ((hasAlpha) ? 1 : 0), 0x01, // has alpha, iPF Type 2
-    0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // reserved
-]
-
-filesystem.open("A", exec_args[2], "W")
-filesystem.writeBytes("A", headerBytes)
-filesystem.open("A", exec_args[2], "A")
-dma.ramToCom(writeBuf, 0, writeCount)
-
-sys.free(outBlock)
-sys.free(imageData)
-sys.free(writeBuf)
\ No newline at end of file
diff --git a/assets/disk0/kodim23.png b/assets/disk0/kodim23.png
new file mode 100644
index 0000000..070d28c
Binary files /dev/null and b/assets/disk0/kodim23.png differ
diff --git a/assets/disk0/decodemov.js b/assets/disk0/tvdos/moviedev/decodemov.js
similarity index 100%
rename from assets/disk0/decodemov.js
rename to assets/disk0/tvdos/moviedev/decodemov.js
diff --git a/assets/disk0/decodemovhi.js b/assets/disk0/tvdos/moviedev/decodemovhi.js
similarity index 100%
rename from assets/disk0/decodemovhi.js
rename to assets/disk0/tvdos/moviedev/decodemovhi.js
diff --git a/assets/disk0/decodemovhimjpg.js b/assets/disk0/tvdos/moviedev/decodemovhimjpg.js
similarity index 100%
rename from assets/disk0/decodemovhimjpg.js
rename to assets/disk0/tvdos/moviedev/decodemovhimjpg.js
diff --git a/assets/disk0/decodemovipf.js b/assets/disk0/tvdos/moviedev/decodemovipf.js
similarity index 100%
rename from assets/disk0/decodemovipf.js
rename to assets/disk0/tvdos/moviedev/decodemovipf.js
diff --git a/assets/disk0/encodemov.js b/assets/disk0/tvdos/moviedev/encodemov.js
similarity index 100%
rename from assets/disk0/encodemov.js
rename to assets/disk0/tvdos/moviedev/encodemov.js
diff --git a/assets/disk0/encodemovhi.js b/assets/disk0/tvdos/moviedev/encodemovhi.js
similarity index 100%
rename from assets/disk0/encodemovhi.js
rename to assets/disk0/tvdos/moviedev/encodemovhi.js
diff --git a/assets/disk0/encodemovipf.js b/assets/disk0/tvdos/moviedev/encodemovipf.js
similarity index 100%
rename from assets/disk0/encodemovipf.js
rename to assets/disk0/tvdos/moviedev/encodemovipf.js
diff --git a/assets/disk0/encodemovipf2.js b/assets/disk0/tvdos/moviedev/encodemovipf2.js
similarity index 100%
rename from assets/disk0/encodemovipf2.js
rename to assets/disk0/tvdos/moviedev/encodemovipf2.js
diff --git a/assets/disk0/encodemovmjpg.js b/assets/disk0/tvdos/moviedev/encodemovmjpg.js
similarity index 100%
rename from assets/disk0/encodemovmjpg.js
rename to assets/disk0/tvdos/moviedev/encodemovmjpg.js
diff --git a/terranmon.txt b/terranmon.txt
index 52f3ec0..c32b571 100644
--- a/terranmon.txt
+++ b/terranmon.txt
@@ -426,8 +426,8 @@ Image is divided into 4x4 blocks and each block is serialised, then the entire i
     uint16 HEIGHT
     uint8 HAS ALPHA
     uint8  IPF Type
-        0: Type 1
-        1: Type 2
+        0: Type 1 (4:2:0 chroma subsampling)
+        1: Type 2 (4:2:2 chroma subsampling)
     byte[10] RESERVED
 
 - *.gz
@@ -448,7 +448,6 @@ Image is divided into 4x4 blocks and each block is serialised, then the entire i
 
     Bits are packed like so:
 
-    uint32 SUBSAMPLING MASK (unimplemented; dont write this)
     uint8 [Cg-Top Left | Co-Top Left]
     uint16 [Y1 | Y0 | Y5 | Y4]
     uint8 [Cg-Top Right | Co-Top Right]