1 files changed, 46 insertions, 0 deletions
diff --git a/src/app/transactiontest/util.S b/src/app/transactiontest/util.S
new file mode 100644
index 0000000..bf2530d
--- /dev/null
+++ b/src/app/transactiontest/util.S
@@ -0,0 +1,46 @@
+.global asm_save_toc
+.global asm_load_toc
+
+stack_backup:
+    .space 2048
+
+sp_backup:
+    .space 2
+
+asm_save_toc:
+    .irp reg,4,5,6,7,8,9,10,11
+    push r\reg
+    .endr
+
+    mov r1, &sp_backup
+
+    mov #1c00h, r10
+    mov #stack_backup, r11
+
+save_sram_word:
+    mov @r10+, 0(r11)
+    add #2, r11
+    cmp #1c00h+2048, r10
+    jlo save_sram_word
+
+    pop r11
+    pop r10
+    add #12, r1
+    ret
+
+asm_load_toc:
+    mov #stack_backup, r10
+    mov #1c00h, r11
+
+load_sram_word:
+    mov @r10+, 0(r11)
+    add #2, r11
+    cmp #1c00h+2048, r11
+    jlo load_sram_word
+
+    mov &sp_backup, r1
+    .irp reg,11,10,9,8,7,6,5,4
+    pop r\reg
+    .endr
+
+    ret
+\ No newline at end of file