diff --git a/services/wolf.sh b/services/wolf.sh
index 3d21cc2..261860a 100644
--- a/services/wolf.sh
+++ b/services/wolf.sh
@@ -976,7 +976,7 @@ UDEV
         <fullname>Texas Instruments TI-99/4A</fullname>
         <path>%ROMPATH%/ti994a</path>
         <extension>.ctg .rpk .bin</extension>
-        <command>%INJECT%=%BASENAME%.esprefix /home/retro/Applications/ti99sim-sdl --joystick1=1 %ROM%</command>
+        <command>%INJECT%=%BASENAME%.esprefix /bin/bash -c "cd /home/retro/Applications && ./ti99sim-sdl --joystick1=1 '%ROM%'"</command>
         <platform>ti99</platform>
         <theme>ti99</theme>
     </system>
@@ -1044,9 +1044,33 @@ XMLEOF
         else
             log_info "ti99sim-sdl already present — skipping build."
         fi
-        log_info "The one thing this can't do for you: your own TI-99/4A console ROM + GROM dump"
-        log_info "(real console firmware, same legal situation as any other BIOS) — ti99sim-sdl's"
-        log_info "own README covers exactly where it expects that once you have it."
+        # The one thing that can't be automated: the console ROM+GROM dump
+        # itself (real copyrighted firmware). Per RetroPie's own
+        # configure_ti99sim() — it symlinks this into the emulator's own
+        # install dir, then cd's there before launching — ti99sim-sdl looks
+        # for it as a plain relative file named TI-994A.ctg in the same
+        # directory the binary itself runs from, i.e. emulators/ here (the
+        # command line above now cd's into that directory first, matching
+        # RetroPie's own pushd + relative-launch pattern exactly).
+        local _TI99_BIOS_DST="$GAME_STORAGE_DIR/emulators/TI-994A.ctg"
+        if [ ! -f "$_TI99_BIOS_DST" ]; then
+            echo ""
+            log_info "TI-99/4A needs your own console ROM+GROM dump, named exactly TI-994A.ctg"
+            log_info "(case-sensitive), placed at: $_TI99_BIOS_DST"
+            if [ "$UNATTENDED" != true ]; then
+                local _TI99_BIOS_SRC=""
+                read -e -r -p "  If you already have that file somewhere, enter its path now to copy it into place (Tab completes, Enter to skip): " -i "$GAME_STORAGE_DIR/" _TI99_BIOS_SRC
+                if [ -n "$_TI99_BIOS_SRC" ] && [ -f "$_TI99_BIOS_SRC" ]; then
+                    cp "$_TI99_BIOS_SRC" "$_TI99_BIOS_DST"
+                    chown "$ACTUAL_USER:$ACTUAL_USER" "$_TI99_BIOS_DST"
+                    log_success "Copied to $_TI99_BIOS_DST"
+                elif [ -n "$_TI99_BIOS_SRC" ]; then
+                    log_warning "No file found at that path — skipped. Copy it to $_TI99_BIOS_DST whenever you have it."
+                else
+                    log_info "Skipped — copy it to $_TI99_BIOS_DST whenever you have it."
+                fi
+            fi
+        fi
         log_info "Then just drop .ctg/.rpk/.bin cartridge files into roms/ti994a/"
     fi
 
@@ -3538,10 +3562,16 @@ if the binary's already there.
 
 The one thing this can't do for you: your own TI-99/4A console ROM + GROM
 dump — same legal situation as any other console BIOS, and not something
-any installer can supply. Per RetroPie's own documentation for this exact
-emulator, it expects that combined into a single cartridge file named
-\`TI-994A.ctg\` (case-sensitive). Then just drop \`.ctg\`/\`.rpk\`/\`.bin\`
-cartridge files into \`roms/ti994a/\`.
+any installer can supply. It needs to be named exactly \`TI-994A.ctg\`
+(case-sensitive) and placed at \`emulators/TI-994A.ctg\` — the same
+directory as the \`ti99sim-sdl\` binary itself, confirmed against
+RetroPie's own \`ti99sim.sh\` (it symlinks the console ROM into the
+emulator's install dir, then \`cd\`s there before launching; this repo's
+own ES-DE command line does the same \`cd\`-first-then-relative-launch
+before running \`ti99sim-sdl\`). If you already had the file somewhere
+when the TI-99/4A prompt ran, the installer offered to copy it there for
+you (tab-completing path prompt); otherwise copy it there by hand. Then
+just drop \`.ctg\`/\`.rpk\`/\`.bin\` cartridge files into \`roms/ti994a/\`.
 
 ## MAME: sample packs showing up as games
 MAME sample packs (audio for a handful of older analog-sound games) use the