ASEM-51 seems interesting. It has a couple companion IDEs, MIDE and 4Flash

ASEM-51 seems interesting. It has a couple companion IDEs, MIDE and 4Flash. Blundar's preferred development environment is now MIDE+ASEM-51. Note: make sure you have a colon ":" after all labels - ASEM51 is much pickier than SYSRAD.

ASEM-51 seems interesting. It has a couple companion IDEs, MIDE and 4Flash

This looks like an interesting 8051 sim

%META:FILEATTACHMENT{name="RAD51.exe" attr="" comment="Copy of Sysrad51 as of 7/18/04 locally" date="1090297318" path="C:\temp\RAD51.exe" size="5891853" user="blundar" version="1.1"}%

%META:TOPICINFO{author="blundar" date="1082138668" format="1.0" version="1.1"}% for all you could want to know and a great tutorial, go to http://www.8052.com

Any 8051 assembler will work fine for coding. Sysrad51, available here seems popular. Be careful when re-assembling a file after making changes to it... Sysrad seems to have some odd bugs in this regard.

Batronix Prog Studio seems fairly popular too.

Dave Blundell modified d51 to support Oki's non-standard use of A5 by creating Pgmfi D51. Chris Favreau compiled some windows binaries for it. You can download the source and linux/win binaries here.

Some 8051 resources:

• Compact lil ref guide
• Another compact ref
• jEdit - jEdit 4.2pre8 and higher includes a MCS51 syntax highlighting Edit Mode definition for 8051 assembly editing