added TI$ and keybopard scanning constants for UP9600 interrupt rate

src/basic/assets/table_ti_lo.s

@@ -8,9 +8,22 @@
 
 table_TI_lo:
 
+#if !CONFIG_RS232_UP9600
+
 	.byte $80                // 10 hours    = 2169000 ticks
 	.byte $C0                // 1 hour      =  216000 ticks
 	.byte $A0                // 10 minutes  =   36000 ticks
 	.byte $10                // 1 minute    =    3600 ticks
 	.byte $58                // 10 seconds  =     600 ticks
 	.byte $3C                // 1 second    =      60 ticks
+
+#else
+
+	.byte $00                // 10 hours    = 2304000 ticks
+	.byte $00                // 1 hour      =  230400 ticks
+	.byte $00                // 10 minutes  =   38400 ticks
+	.byte $00                // 1 minute    =    3840 ticks
+	.byte $80                // 10 seconds  =     640 ticks
+	.byte $40                // 1 second    =      64 ticks
+
+#endif