several fixes

OperatingSystem/Applications/displaydemo/setcolor.asm

@@ -0,0 +1,62 @@
+.include "extern_symbols.s" ;include monitor symbols.
+    START_ADDR   .EQU 0x8000
+    
+    org START_ADDR  
+com_header:
+    jp com_prg
+    db 0x00
+    dw 0x00, 0x00, 0x00   ;always 0
+    dw [START_ADDR]     ;start addr
+    dw [_eof]           ;end of file
+    dw [_eof - START_ADDR]  ;length
+    dc 48,0x00
+    
+com_prg:
+; Program start
+    call VDP_INIT_TEXT2
+    call VTERM_INIT
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+    ld hl,[STR_Banner_Start_Test]
+    call VTERM_PRINT_STR
+
+    
+
+    call VTERM_CURSOR_ON
+
+    ld b, TmsBlack
+    ld c, TmsWhite
+    call VDP_COLOR
+
+TEST_ECHO:
+    call read_char
+    jp z, TEST_ECHO
+    call VTERM_PRINT
+    jr TEST_ECHO
+    ret
+
+STR_Banner_Start_Test:
+    db 10,13,"Z8C Monitor V2.1 by Dennis Gunia (2022-2024)",10,13,"TEST",10,13,"NEW LINE",10,13,"TEST > ",0
+
+
+    .include "kdrv_vdpterm.s"
+    .include "krdv_vdp.s"
+    .include "kdrv_vt82c42.s"
+    .include "kdrv_int.s"
+_eof:
+
+