Super AMS compatibility done

A project log for TI-99/4A memory extension with Pipistrello FPGA

64 megabytes RAM expansion for the TI-99/4A using the Pipistrello FPGA board and a buffer board.

Erik PiehlErik Piehl 09/21/2016 at 20:140 Comments

I modified the memory paging side of the design somewhat, so that the paging is controlled using the same bits as with "Super AMS" memory paging unit. This required the addition of the support of the TMS9900 "CRU" memory space - but in a limited manner. Now the the FPGA based memory expansion passes the SAMS memory tester. This is very nice indeed - also since I don't have to write memory test code myself :)