I receive the schematic... I have some experience with 80188.... Les, Adam, let study together this circuit... The problem is that the schematic is limited for less than 64k The A17,A18,A19,A20 are not used... When the 8088 is reset, a jump to F:FFF0 (SEG/OFS), forces a14/a15 to high that enables the EPROM at address C000H. (+offset FF0)= CFF0H. In this address must have a jump for the begin of eprom...maybe C000:0, am i correct? My question is, how can i work with 1M of memory? First, how to define the structure of assembly program (.COM) to put on EPROM... I have an idea, but i want yours comments... I'm not sure, but all works at segment 0. (with exception on RESET) Miguel Received: from ([200.215.113.26]) by blusoft.org.br ( IA Mail Server Version: 2 ..3.1 Build: 10020 ) ) ; 05 Nov 1999 11:24:17 UT Message-ID: <38232EA3.27C0@blusoft.org.br> Date: Fri, 05 Nov 1999 11:23:15 -0800 From: WF AUTOMACAO - KITS EDUCACIONAIS NACIONAIS Organization: DO REAL REMOTE EXPERIMENT WITH 8051 - http://www.inf.ufsc.br/~jbos co/labvir.htm X-Mailer: Mozilla 2.0 (Win16; I) MIME-Version: 1.0 To: les@gallmark.mb.ca, adamdb@juno.com, wf@blusoft.org.br Subject: 8088 SCHEMATIC Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mozilla-Status: 0001 I receive the schematic... I have some experience with 80188.... Les, Adam, let study together this circuit... The problem is that the schematic is limited for less than 64k The A17,A18,A19,A20 are not used... When the 8088 is reset, a jump to F:FFF0 (SEG/OFS), forces a14/a15 to high that enables the EPROM at address C000H. (+offset FF0)= CFF0H. In this address must have a jump for the begin of eprom...maybe C000:0, am i correct? My question is, how can i work with 1M of memory? First, how to define the structure of assembly program (.COM) to put on EPROM... I have a idea, but i want yours comments... I'm not sure, but all works at segment 0. (with exception on RESET) Miguel