more reference material and working text blit

README.md

@@ -47,3 +47,4 @@ There are a lot of good materials out there: here is what I used to make this ga
 - [SNES opcode list](http://wiki.metroidconstruction.com/doku.php?id=super:technical_information:asm_mnemonics)
 - [65816 primer](http://softpixel.com/~cwright/sianse/docs/65816NFO.HTM)
 - [Another 6502 reference, insightful](https://github.com/wiz-lang/wiz/wiki/Registers-and-Memory-(6502))
+- [65816 interrupts guide](http://6502.org/tutorials/65c816interrupts.html)

src/main.S

@@ -23,28 +23,25 @@
             stal  $00C051     ; select text mode only. "only"?
             ldal  $00C054     ; select text page 1 (there are 2)
             ldal  $00C056     ; select "low res" graphics
+            rep   #$30        ; go back to 16-bit mode
 
-; ok, we are done toggling switches, let's go make a string
+            ldx   #hithere+2 ; strl, first two bytes are strlen, # denotes immediate addr val
-            rep   #$20
+            ldy   #$0400     ; start of text buffer on 00
+            ldal  hithere
+            dec
 
-            ldx   #2
+            mvn   $02,        $00
-:loopy      nop
+            brk
-            lda   hithere,x
-            stal  $000400,x
-            cpx   hithere
-            inx
-            bcs   outbrk
-            jmp   :loopy
-
-outbrk      brk
 
 ; Important locations
 SPEAKER     equ   $E0C030
 PRODOS16    equ   $E100A8
 
             jsl   PRODOS16
-                              ; This exit code is "device busy", why is it the only one
+
-                              ; that works?!
+; This exit code is "device busy", why is it the only one
+; that works?!
+
             da    $29
             adrl  QP
             bcs   ERROR
@@ -377,6 +374,36 @@ hithere     strl  "this was excruciating"
 
 
 
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