From 85da0e6b6535269a7086408482e2a41741e4ea92 Mon Sep 17 00:00:00 2001
From: David Stancu <dstancu@nyu.edu>
Date: Sun, 4 Feb 2018 21:25:37 -0500
Subject: [PATCH] figure out how to modeset but still need to toggle to get
 full bank a for adding, unelegant perhaps?

---
 src/main.S | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/main.S b/src/main.S
index af4ce54..cccab6d 100644
--- a/src/main.S
+++ b/src/main.S
@@ -5,7 +5,7 @@
 ; ensure 16-bit mode (unnecessary?)
             clc
             xce
-            rep   #$20
+            rep   #$30
 
             phk
             plb
@@ -23,7 +23,8 @@
             ldal  $00C054     ; select text page 1 (there are 2)
             ldal  $00C056     ; select "low res" graphics
 
-*            rep   #$30
+            rep   #$30
+            sep   #$20
 
 ; show the current char on screen
 ; read keyboard then hit strobe to reset
@@ -49,16 +50,27 @@ keydown     nop
             beq   right
             jmp   dispchar
 
-up          nop
+up          clc
+            cpx   #1488
+            beq   rtsout
+            rep   #$30
+            pha
+            txa
+            sbc   #128
+            tax
+            pla
+            sep   #$20
             jmp   rtsout
 down        clc
             cpx   #1488
             beq   rtsout
+            rep   #$30
             pha
             txa
             adc   #128
             tax
             pla
+            sep   #$20
             jmp   rtsout
 
 left        clc
@@ -269,6 +281,21 @@ brkboi      brk
 
 
 
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