From: Ryan <>
Date: Mon, 13 Oct 2025 22:50:20 +0000 (-0500)
Subject: Add blinking cursor to writer test program
X-Git-Url: https://git.the-white-hart.net/?a=commitdiff_plain;h=2cae25a63d79af27b2be06ed4e07e5e0abe29e4b;p=vhdl

Add blinking cursor to writer test program
---

diff --git a/projects/cpu_0/asm/timers.asm b/projects/cpu_0/asm/timers.asm
index 5557878..b3f5f4a 100644
--- a/projects/cpu_0/asm/timers.asm
+++ b/projects/cpu_0/asm/timers.asm
@@ -2,17 +2,18 @@
 ( -- )
 timer_reset:
     ( Enable timer 0 with 1s period, auto-restart )
-    ( #8 0x02i8 #32 timer0_count_h !8 drop )
-    ( #8 0xfai8 #32 timer0_count_m !8 drop )
-    ( #8 0xf0i8 #32 timer0_count_l !8 drop )
-    ( #8 0x0fi8 #32 timer0_ctrl    !8 drop )
+    #8 0x00i8 #32 timer0_count_h !8 drop
+    #8 0x5fi8 #32 timer0_count_m !8 drop
+    #8 0x5ei8 #32 timer0_count_l !8 drop
+    #8 0x0fi8 #32 timer0_ctrl    !8 drop
     ;
 
 
 ( Timer 0 interrupt )
 ( -- )
 timer0_int:
-    ;
+    #32 timer0_ctrl @8 #32 timer0_ctrl !8 drop
+    call vga_draw_cursor ;
 
 
 ( Timer 1 interrupt )
diff --git a/projects/cpu_0/asm/vga_console.asm b/projects/cpu_0/asm/vga_console.asm
index b095eb3..0aa3fc0 100644
--- a/projects/cpu_0/asm/vga_console.asm
+++ b/projects/cpu_0/asm/vga_console.asm
@@ -143,22 +143,24 @@ vga_update_cursor:
 
 ( -- )
 vga_undraw_cursor:
+    idis
     #32 vga_cursor_col @8
     #32 vga_cursor_by @8 #8 80i8 call mul_uu
     #32 vga_cursor_bx @8 + shl #8 1i8 +
     #32 vga_scr +
     !8 drop
-    ;
+    ien ;
 
 
 ( -- )
 vga_draw_cursor:
+    idis
     #32 vga_cursor_y @8 #32 vga_cursor_by !8 #8 80i8 call mul_uu
     #32 vga_cursor_x @8 #32 vga_cursor_bx !8 + shl #8 1i8 +
     #32 vga_scr + >r
     r@ @8 dup >r lsr lsr lsr lsr r> #8 0x0fi8 & shl shl shl shl |
     r> !8 drop
-    ;
+    ien ;
 
 
 ( Print an ASCIIZ string out the VGA display )