Fix some unicode mappings

src/conio/utf8_codepages.c

@@ -1472,8 +1472,9 @@ const static struct ciolib_cpmap prestel_table[] = {
 	{0x2192, ']'}, // →
 	{0x2191, '^'}, // ↑
 	{0x2317, '_'}, // Viewdata square
-	{'_', '`'},
+	{0x2015, '`'}, // Horizontal bar *
 	{0xbc, '{'},   // ¼
+	{0x23f8, '|'}, // Double vertical bar *
 	{0xbe, '}'},   // ¾
 	{0xf7, '~'},   // ÷
 
@@ -1537,14 +1538,14 @@ const static uint32_t prestel_unicode_table[256] = {
 	0x00054, 0x00055, 0x00056, 0x00057,
 	0x00058, 0x00059, 0x0005a, 0x02190,
 	0x000bd, 0x02192, 0x02191, 0x02317,
-	0x0005f, 0x00061, 0x00062, 0x00063,
+	0x02015, 0x00061, 0x00062, 0x00063,
 	0x00064, 0x00065, 0x00066, 0x00067,
 	0x00068, 0x00069, 0x0006a, 0x0006b,
 	0x0006c, 0x0006d, 0x0006e, 0x0006f,
 	0x00070, 0x00071, 0x00072, 0x00073,
 	0x00074, 0x00075, 0x00076, 0x00077,
 	0x00078, 0x00079, 0x0007a, 0x000bc,
-	0x0007c, 0x000be, 0x000f7, 0x0007f,
+	0x023f8, 0x000be, 0x000f7, 0x0007f,
 
 	0x00020, 0x1fb00, 0x1fb01, 0x1fb02,
 	0x1fb03, 0x1fb04, 0x1fb05, 0x1fb06,