6502/symon
1
0
Fork 0
mirror of https://github.com/sethm/symon.git synced 2025-02-06 14:30:06 +00:00
Code Issues Projects Releases Wiki Activity

mask all bits beyond bits 0 to 7 on bus reads to ensure no surplus bits cause unpredictable system behavior.

Browse Source
This commit is contained in:
Maik Merten 2014-08-23 16:50:34 +02:00
parent 4796b65390
commit 72ba068beb
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/main/java/com/loomcom/symon/Bus.java
View File

@ -170,7 +170,7 @@ public class Bus {
if(d != null) { if(d != null) {
MemoryRange range = d.getMemoryRange(); MemoryRange range = d.getMemoryRange();
int devAddr = address - range.startAddress(); int devAddr = address - range.startAddress();
return d.read(devAddr); return d.read(devAddr) & 0xff;
} }
throw new MemoryAccessException("Bus read failed. No device at address " + String.format("$%04X", address)); throw new MemoryAccessException("Bus read failed. No device at address " + String.format("$%04X", address));