From 7abddb0b3575ca4a54ddac69ceebbfd37ab98b8e Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Mon, 30 Jun 2025 18:31:07 +0200
Subject: [PATCH] Tseng graphics cards: restore some legacy renderers, fixes
 Slackware in 4bpp high resolution mode.

---
 src/video/vid_et3000.c    |  3 +++
 src/video/vid_et4000.c    | 11 +++++++++++
 src/video/vid_et4000w32.c |  3 +++
 3 files changed, 17 insertions(+)

diff --git a/src/video/vid_et3000.c b/src/video/vid_et3000.c
index a82f93385..482cc60a3 100644
--- a/src/video/vid_et3000.c
+++ b/src/video/vid_et3000.c
@@ -476,6 +476,9 @@ et3000_recalctimings(svga_t *svga)
             svga->clock = (cpuclock * (double) (1ULL << 32)) / 36000000.0;
             break;
     }
+
+    if (svga->render == svga_render_4bpp_highres)
+        svga->render = svga_render_4bpp_tseng_highres;
 }
 
 static void *
diff --git a/src/video/vid_et4000.c b/src/video/vid_et4000.c
index a99cb8872..d7de0706e 100644
--- a/src/video/vid_et4000.c
+++ b/src/video/vid_et4000.c
@@ -723,6 +723,17 @@ et4000_recalctimings(svga_t *svga)
         svga->rowoffset <<= 1;
         svga->render = svga_render_8bpp_highres;
     }
+
+    if (svga->render == svga_render_4bpp_highres)
+        svga->render = svga_render_4bpp_tseng_highres;
+
+    if (dev->type == ET4000_TYPE_TC6058AF) {
+        if (svga->render == svga_render_8bpp_lowres)
+            svga->render = svga_render_8bpp_tseng_lowres;
+
+        else if (svga->render == svga_render_8bpp_highres)
+            svga->render = svga_render_8bpp_tseng_highres;
+    }
 }
 
 static void
diff --git a/src/video/vid_et4000w32.c b/src/video/vid_et4000w32.c
index 533bd1f28..2e9a7796a 100644
--- a/src/video/vid_et4000w32.c
+++ b/src/video/vid_et4000w32.c
@@ -600,6 +600,9 @@ et4000w32p_recalctimings(svga_t *svga)
             }
         }
     }
+
+    if (svga->render == svga_render_4bpp_highres)
+        svga->render = svga_render_4bpp_tseng_highres;
 }
 
 void