From 8c1bfa5a0589503d23e63058735a0735bccaee62 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Thu, 7 Jan 2016 20:36:27 -0500
Subject: [PATCH] This is the bare minimum to prove that the ROM is trying
 properly to boot.

---
 Machines/Electron/Electron.cpp | 40 +++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/Machines/Electron/Electron.cpp b/Machines/Electron/Electron.cpp
index 7967c06a6..1d6a16378 100644
--- a/Machines/Electron/Electron.cpp
+++ b/Machines/Electron/Electron.cpp
@@ -23,8 +23,6 @@ Machine::~Machine()
 
 unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uint16_t address, uint8_t *value)
 {
-	printf("%04x\n", address);
-
 	if(address < 32768)
 	{
 		if(isReadOperation(operation))
@@ -40,7 +38,43 @@ unsigned int Machine::perform_bus_operation(CPU6502::BusOperation operation, uin
 	{
 		if(address > 49152)
 		{
-			if(isReadOperation(operation)) *value = os[address - 49152];
+			if((address & 0xff00) == 0xfe00)
+			{
+				printf("%c: %02x: ", isReadOperation(operation) ? 'r' : 'w', *value);
+
+				switch(address&0xf)
+				{
+					case 0x0:
+						printf("Interrupt status or control\n");
+					break;
+					case 0x1:
+					break;
+					case 0x2:
+					case 0x3:
+						printf("Screen start address\n");
+					break;
+					case 0x4:
+						printf("Cassette\n");
+					break;
+					case 0x5:
+						printf("Interrupt clear and paging\n");
+					break;
+					case 0x6:
+						printf("Counter\n");
+					break;
+					case 0x7:
+						printf("Misc. control\n");
+					break;
+					default:
+						printf("Palette\n");
+					break;
+				}
+			}
+			else
+			{
+				if(isReadOperation(operation))
+					*value = os[address - 49152];
+			}
 		}
 		else
 		{