getting floating point stuff now

2026-05-18 12:06:03 +02:00
parent b13161f9c2
commit aeb5094b05
8 changed files with 77 additions and 36 deletions
@@ -8,6 +8,14 @@ struct video_interface {
    video_interface(mem &);
    void write16(ircolib::u32, ircolib::u16);
    void write32(ircolib::u32, ircolib::u32);
+    ircolib::u32 xfb_top_addr() {
+        auto addr = tfbl.fbb;
+        if (tfbl.page) {
+            addr <<= 5;
+        }
+
+        return addr + tfbl.xof;
+    }

    union DCR {
        struct {
@@ -80,26 +88,15 @@ struct video_interface {
        ircolib::u32 raw;
    } bbei, bboi;

-    union TFBL {
+    union FBR {
        struct {
-            unsigned : 9;
-            unsigned fbb : 15;
+            unsigned : 3;
+            unsigned page : 1;
            unsigned xof : 4;
-            unsigned : 4;
+            unsigned fbb : 24;
        };
-
        ircolib::u32 raw;
-    } tfbl;
-
-    union BFBL {
-        struct {
-            unsigned : 9;
-            unsigned fbb : 15;
-            unsigned y : 8;
-        };
-
-        ircolib::u32 raw;
-    } bfbl;
+    } tfbl, bfbl;

    union FCT012 {
        struct {