According to mame there is rom covering the entire memory range from0-FFFF ROM Regions: Region ROM File Start - End CRC 9010A SHA1 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb1> robotron.sb1 0 - FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=66C7D3EF> 66C7D3EF <http://tech.quarterarcade.com/tech/default.aspx?sign=1151> 1151 f6d60e26c209c1df2cc01ac07ad5559daa1b7118 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb2> robotron.sb2 1000 - 1FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=5BC6C614> 5BC6C614 <http://tech.quarterarcade.com/tech/default.aspx?sign=88A3> 88A3 4d6e82bc29f49100f7751ccfc6a9ff35695b84b3 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb3> robotron.sb3 2000 - 2FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=E99A82BE> E99A82BE <http://tech.quarterarcade.com/tech/default.aspx?sign=576F> 576F 06a8c8dd0b4726eb7f0bb0e89c8533931d75fc1c CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb4> robotron.sb4 3000 - 3FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=AFB1C561> AFB1C561 <http://tech.quarterarcade.com/tech/default.aspx?sign=BAD8> BAD8 aaf89c19fd8f4e8750717169eb1af476aef38a5e CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb5> robotron.sb5 4000 - 4FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=62691E77> 62691E77 <http://tech.quarterarcade.com/tech/default.aspx?sign=364E> 364E 79b4680ce19bd28882ae823f0e7b293af17cbb91 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb6> robotron.sb6 5000 - 5FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=BD2C853D> BD2C853D <http://tech.quarterarcade.com/tech/default.aspx?sign=DB53> DB53 f76ec5432a7939b33a27be1c6855e2dbe6d9fdc8 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb7> robotron.sb7 6000 - 6FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=49AC400C> 49AC400C <http://tech.quarterarcade.com/tech/default.aspx?sign=B6DF> B6DF 06eae5138254723819a5e93cfd9e9f3285fcddf5 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb8> robotron.sb8 7000 - 7FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=3A96E88C> 3A96E88C <http://tech.quarterarcade.com/tech/default.aspx?sign=6D8> 6D8 7ae38a609ed9a6f62ca003cab719740ed7651b7c CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sb9> robotron.sb9 8000 - 8FFF <http://tech.quarterarcade.com/tech/default.aspx?crc=B124367B> B124367B <http://tech.quarterarcade.com/tech/default.aspx?sign=1020> 1020 fd9d75b866f0ebbb723f84889337e6814496a103 CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sba> robotron.sba D000 - DFFF <http://tech.quarterarcade.com/tech/default.aspx?crc=13797024> 13797024 <http://tech.quarterarcade.com/tech/default.aspx?sign=2B8C> 2B8C d426a50e75dabe936de643c83a548da5e399331c CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sbb> robotron.sbb E000 - EFFF <http://tech.quarterarcade.com/tech/default.aspx?crc=7E3C1B87> 7E3C1B87 <http://tech.quarterarcade.com/tech/default.aspx?sign=74EF> 74EF f8c6cbe3688f256f41a121255fc08f575f6a4b4f CPU1 <http://tech.quarterarcade.com/tech/default.aspx?rom=robotron.sbc> robotron.sbc F000 - FFFF <http://tech.quarterarcade.com/tech/default.aspx?crc=645D543E> 645D543E <http://tech.quarterarcade.com/tech/default.aspx?sign=414E> 414E fad7cea868ebf17347c4bc5193d647bbd8f9517b And the ram is CPU: M6809 CPU#: 1 Sound?: No <http://tech.quarterarcade.com/Tech/CodeGenerator/Default.aspx?g=2380&set=ro botron&cpu=2972> Fluke 9010A Script Start - End R W 0 - 97FF r w 9800 - BFFF r w C000 - C00F w C804 - C807 r w C80C - C80F r w C900 - C900 w CA00 - CA07 w CB00 - CB00 r CBFF - CBFF w CC00 - CFFF r w D000 - FFFF r w So the ram / rom address space must be bank switched. Question is how to do that so I can get a good ram test with the fluke? I can do rom tests just fine so the board must default to the rom bank's. Suggestions? Thanks, David _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/