Changeset fffab34 in buchla-emu

Timestamp:

09/04/2017 04:32:56 PM (7 years ago)

Author:

Thomas Lopatic <thomas@…>

Branches:

master

Children:

ca77925

Parents:

d021bbb

Message:

Support UND attribute.

File:

• emu/vid.c (modified) (2 diffs)

emu/vid.c

@@ -50 +50 @@
 #define OD0_CB 0x0800
 
+#define AT_UND 0x0100
 #define AT_CG 0x8000
 
@@ -125 +126 @@
                                 int32_t fg = (at & 0x00f0) >> 4;
 
-                                uint16_t *cg = (at & AT_CG) != 0 ? cg0 : cg1;
-                                int32_t bits = cg[256 * line + ch];
+                                int32_t bits;
+
+                                if ((at & AT_UND) != 0 && line == 1) {
+                                        bits = 0xff;
+                                }
+                                else {
+                                        uint16_t *cg = (at & AT_CG) != 0 ? cg0 : cg1;
+                                        bits = cg[256 * line + ch];
+                                }
+
                                 int32_t mask = 0x01;