From 9ea581d1d649fe0059597b44b39d0f3e86641064 Mon Sep 17 00:00:00 2001
From: Abdessamad Derraz <3028866+Abdess@users.noreply.github.com>
Date: Sat, 17 Oct 2026 01:54:19 +0200
Subject: [PATCH] fix: reprofile virtualxt from its C core

The profile described an Odin edition no branch carries any more. At
the pinned commit core.c embeds VXTBIOS, VXTX and the EGA BIOS, never
asks for the system directory, and writes its FreeDOS image to the
save directory; an INI machine can load a ROM from a path it names.
---
 emulators/virtualxt.yml | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/emulators/virtualxt.yml b/emulators/virtualxt.yml
index 6c1457e1..2f286359 100644
--- a/emulators/virtualxt.yml
+++ b/emulators/virtualxt.yml
@@ -3,31 +3,31 @@ type: libretro
 core_classification: pure_libretro
 source: "https://codeberg.org/virtualxt/virtualxt"
 upstream: "https://codeberg.org/virtualxt/virtualxt"
-profiled_date: "2026-03-25"
+profiled_date: "2026-10-17"
 source_commit: "ed177f5fb4f54d099bc217281930265ae1de9eca"
-core_version: "2.1.0"
+core_version: "3.1.0"
 display_name: "VirtualXT"
 cores: [virtualxt]
 systems: [ibm-pc]
 
-# All BIOS ROMs are embedded at compile time via Odin's #load() directive.
-# No external files are loaded from system_dir in standard operation.
+# The BIOS ROMs are compiled in: core.c includes headers generated from
+# bios/vxtbios.bin, bios/vxtx.bin and bios/egabios.bin, and hands them to the
+# ROM peripherals with vxt_rom_set_data. The core never asks for the system
+# directory.
 #
-# Embedded ROMs (core.odin:323-394, edge branch):
-#   GLABIOS.ROM, pcxtbios.bin, vgabios.bin, vxtx.bin, GLaTICK_0.8.4_AT.ROM
-#
-# INI config files can reference external ROM paths via load_from_file
-# (rom.odin:42-68), but this is not the standard usage path.
-#
-# source_ref: src/frontend/core.odin:323-394 (setup_default_machine, #load)
-# source_ref: src/modules/rom/rom.odin:42-68 (load_from_file, INI only)
-# source_ref: src/frontend/options.odin:55 (core option virtualxt_bios)
+# source_ref: src/frontend/core.c:53-61 (embedded headers)
+# source_ref: src/frontend/core.c:358-375 (BIOS at 0xFE000, VXTX at 0xFD800)
+# source_ref: src/frontend/core.c:438-444 (EGA BIOS when the EGA adapter is chosen)
+# source_ref: src/frontend/core.c:1195-1232 (FreeDOS image written to the save directory)
+# source_ref: src/modules/rom/rom.c:81-96 (an INI "mem" key loads a ROM from the path it gives)
 
 files: []
 
 notes:
   bios_approach: >
-    All BIOS ROMs embedded at compile time via Odin #load() directive.
-    Open-source replacements: GLaBIOS (GPL), Turbo XT BIOS 3.1, vgabios.
-    No proprietary IBM PC/XT BIOS needed.
+    VXTBIOS, the VXTX disk extension and the EGA BIOS are embedded. A machine
+    described by an INI file can load a ROM from a path the INI names, read
+    through the frontend VFS as written. With no content the core writes its
+    embedded FreeDOS hard disk image to virtualxt_default.img in the save
+    directory and boots it.
   supported_extensions: "img, ini, exe, com"