scripts: migrate all QEMU/test scripts to single system image

boot.sh: replace esp/ + DISK_IMG with single SYSTEM_IMG on ide.0
(hooks into mksystem.sh --force for auto-staging).

boot-image.sh: delegate to mksystem.sh --chain (build-image.sh deleted).

build-image-release.sh: delegate to mksystem.sh --chain --gpt.

qemu.sh: flexible launcher uses SYSTEM_IMG; --chain flag for
full-chain build.

test-disk.sh: drop ESP_DIR (mksystem.sh stages everything).

test-fault.sh: boot system.img on ide.0 + CRASHLOG stick on ide.1;
replace deleted mkdisk.sh with inline mkfs.fat.

test-gfx.sh: system.img on ide.0, stage via mksystem.sh.

test-mouse.sh: system.img on ide.0, stage via mksystem.sh.

test-msg.sh: system.img on ide.0, stage via mksystem.sh.

Makefile: remove stale build-image.sh/mkdisk.sh references from help;
image target delegates to mksystem.sh --chain.

All scripts syntax-checked (bash -n). build-image.sh and mkdisk.sh
no longer referenced anywhere.

1 files changed, 11 insertions, 36 deletions

diff --git a/scripts/boot.sh b/scripts/boot.sh
index 5b8e6fa..9c60dc9 100755
--- a/scripts/boot.sh
+++ b/scripts/boot.sh
@@ -2,8 +2,8 @@
 #
 # scripts/boot.sh — quick direct boot in QEMU (dev loop)
 #
-# Fastest iteration: boots the kernel directly as BOOTX64.EFI via QEMU's
-# FAT driver, skipping the bootloader entirely.
+# Builds the kernel, stages the system image, and boots directly as
+# BOOTX64.EFI via QEMU's FAT driver.  One image = one drive.
 #
 # Usage:
 #   ./scripts/boot.sh [--gui] [--debug] [--release] [--mem 512M] [--smp 2]
@@ -19,26 +19,19 @@
 #   OVMF    path to OVMF firmware (default: /usr/share/edk2/x64/OVMF.4m.fd)
 #   MEM     memory size (default: 256M)
 #   SMP     CPU count (default: 1)
-#   DISK_IMG raw disk image attached as the SATA data disk (default: /tmp/disk.img)
-#
-# The data disk is pinned to AHCI port 0 (ide.0) and the ESP to port 1
-# (ide.1); the implicit `-drive file=fat:rw:esp` would otherwise grab
-# port 0 and the kernel would find the ESP where it expects a FAT32 disk.
+#   SYSTEM_IMG  system image path (default: /tmp/system.img)
 #
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
-PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
-
+PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 cd "$PROJECT_DIR"
 
-ESP_DIR="$PROJECT_DIR/esp"
-
 # ---- config ----
 OVMF="${OVMF:-/usr/share/edk2/x64/OVMF.4m.fd}"
 MEM="${MEM:-256M}"
 SMP="${SMP:-1}"
-DISK_IMG="${DISK_IMG:-/tmp/disk.img}"
+SYSTEM_IMG="${SYSTEM_IMG:-/tmp/system.img}"
 PROFILE="debug"
 CARGO_FLAGS=""
 GUI=""
@@ -46,7 +39,6 @@ DEBUG=""
 
 # ---- args ----
 source "$SCRIPT_DIR/lib-boot-args.sh"
-# boot.sh-specific flags live here; everything else is shared.
 handle_arg() {
         case "$1" in
         --release | -r)
@@ -62,46 +54,29 @@ handle_arg() {
 parse_boot_args "$@"
 
 OUT_DIR="target/x86_64-unknown-uefi/$PROFILE"
-KERNEL="$OUT_DIR/rsdos.efi"
 
 # ---- build ----
 echo "=== Building kernel ($PROFILE) ==="
 cargo build --package rsdos --target x86_64-unknown-uefi $CARGO_FLAGS
 
-# ---- deploy ----
-mkdir -p "$ESP_DIR/EFI/BOOT"
-cp "$KERNEL" "$ESP_DIR/EFI/BOOT/BOOTX64.EFI"
-echo "  kernel: $(ls -lh "$KERNEL" | awk '{print $5}')"
+# ---- stage system image ----
+echo "=== Staging system image ==="
+"$SCRIPT_DIR/mksystem.sh" --force "$SYSTEM_IMG"
+echo "  system image: $SYSTEM_IMG"
 
 # ---- boot ----
 echo ""
 echo "=== Booting (direct: firmware → rsnix) ==="
 echo "  ovmf:  $OVMF"
 echo "  mem:   $MEM   smp: $SMP"
-echo "  disk:  $([ -f "$DISK_IMG" ] && echo "$DISK_IMG" || echo "none ($DISK_IMG missing)")"
 echo "  gui:   $([ -n "$GUI" ] && echo yes || echo no)"
 echo "  gdb:   $([ -n "$DEBUG" ] && echo ':1234' || echo off)"
 echo ""
 
-if [ ! -f "$DISK_IMG" ]; then
-        echo "  (creating missing disk image: $DISK_IMG)"
-        "$SCRIPT_DIR/mkdisk.sh" "$DISK_IMG"
-fi
-
-if [ -f "$DISK_IMG" ]; then
-        DISK_ARGS=(
-                -drive "file=$DISK_IMG,format=raw,if=none,id=disk"
-                -device ide-hd,drive=disk,bus=ide.0
-        )
-else
-        DISK_ARGS=()
-fi
-
 exec qemu-system-x86_64 \
         -bios "$OVMF" \
-        "${DISK_ARGS[@]}" \
-        -drive file=fat:rw:"$ESP_DIR",format=raw,if=none,id=esp \
-        -device ide-hd,drive=esp,bus=ide.1 \
+        -drive "file=$SYSTEM_IMG,format=raw,if=none,id=disk" \
+        -device ide-hd,drive=disk,bus=ide.0 \
         -serial stdio \
         -m "$MEM" \
         -machine q35 \