From 35a137dea086c338e9cbb7087f28ce7c2ca51e9c Mon Sep 17 00:00:00 2001
From: rs <>
Date: Fri, 10 Oct 2025 00:41:43 -0500
Subject: [PATCH] Commit progress on vga_console

---
 projects/cpu_0/asm/vga_console.asm | 74 +++++++++++++++++++++++++++---
 1 file changed, 67 insertions(+), 7 deletions(-)

diff --git a/projects/cpu_0/asm/vga_console.asm b/projects/cpu_0/asm/vga_console.asm
index 3111cc0..8f5345b 100644
--- a/projects/cpu_0/asm/vga_console.asm
+++ b/projects/cpu_0/asm/vga_console.asm
@@ -21,8 +21,9 @@ vga_reset:
     ( TODO: Reload tile memory? )
 
     ( Initialize console )
-    #8 0x00i8 #32 vga_cursor_loc !32 drop  ( Set the cursor to the beginning of the screen )
-    #8 0x3bi8 #32 vga_cursor_col !8  drop  ( Set the cursor color to light blue on dark blue )
+    #8 0x00i8 #32 vga_cursor_x   !8 drop  ( Set the cursor to the beginning of the screen )
+    #8 0x00i8 #32 vga_cursor_y   !8 drop
+    #8 0x3bi8 #32 vga_cursor_col !8 drop  ( Set the cursor color to light blue on dark blue )
 
     ( Clear screen )
     #32 vga_scr #32 0x00003b20i32 #32 4800i32 call mem_set_16
@@ -33,21 +34,78 @@ vga_reset:
 ( Print a character to the VGA display )
 ( c -- )
 vga_console_putc:
+    dup #8 0x20i8 - jp .ctrl
     #32 vga_scr #32 vga_cursor_loc @32 + dup >r
     !8 drop
     #32 vga_cursor_col @8 r> #8 1i8 + !8 drop
     #32 vga_cursor_loc dup @32 #8 0x02i8 + swap !32 drop
     ;
+.ctrl:
+    dup + dup +
+    #32 .ctrl_lut +
+    @32 >r ;
+.ctrl_nop: ;
+.ctrl_bel: ;
+.ctrl_bs:
+    ;
+.ctrl_tab:
+    ;
+.ctrl_lf:
+    ( Fall through to CR )
+.ctrl_cr:
+    ;
+.ctrl_ff:
+    ;
+
+align
+.ctrl_lut:
+    .ctrl_nop ( 0x00 - nul )
+    .ctrl_nop ( 0x01 )
+    .ctrl_nop ( 0x02 )
+    .ctrl_nop ( 0x03 )
+    .ctrl_nop ( 0x04 )
+    .ctrl_nop ( 0x05 )
+    .ctrl_nop ( 0x06 )
+    .ctrl_bel ( 0x07 - bell )
+    .ctrl_bs  ( 0x08 - backspace )
+    .ctrl_tab ( 0x09 - horizontal tab )
+    .ctrl_lf  ( 0x0a - line feed )
+    .ctrl_nop ( 0x0b - vertical tab )
+    .ctrl_ff  ( 0x0c - form feed )
+    .ctrl_cr  ( 0x0d - carriage return )
+    .ctrl_nop ( 0x0e )
+    .ctrl_nop ( 0x0f )
+    .ctrl_nop ( 0x10 )
+    .ctrl_nop ( 0x11 )
+    .ctrl_nop ( 0x12 )
+    .ctrl_nop ( 0x13 )
+    .ctrl_nop ( 0x14 )
+    .ctrl_nop ( 0x15 )
+    .ctrl_nop ( 0x16 )
+    .ctrl_nop ( 0x17 )
+    .ctrl_nop ( 0x18 - cancel )
+    .ctrl_nop ( 0x19 )
+    .ctrl_nop ( 0x1a )
+    .ctrl_nop ( 0x1b - escape )
+    .ctrl_nop ( 0x1c )
+    .ctrl_nop ( 0x1d )
+    .ctrl_nop ( 0x1e )
+    .ctrl_nop ( 0x1f )
+
+
+( Wrap cursor and scroll screen )
+vga_update_cursor:
+    ;
 
 
 ( Print an ASCIIZ string out the VGA display )
 ( &s -- )
 vga_console_puts:
-_vga_console_puts_loop:
-    dup @8 dup jz _vga_console_puts_done
+.loop:
+    dup @8 dup jz .done
     call vga_console_putc
-    #8 0x01i8 + jmp _vga_console_puts_loop
-_vga_console_puts_done:
+    #8 0x01i8 + jmp .loop
+.done:
     drop drop ;
 
 
@@ -55,5 +113,7 @@ _vga_console_puts_done:
 ( RAM variables )
 
 
-vga_cursor_loc=0x01000000
+vga_cursor_x=0x01000000
+vga_cursor_y=0x01000001
+vga_cursor_loc=0x01000008
 vga_cursor_col=0x01000004
-- 
2.43.0