22000000h +-----------------------+ | | | | | | | External ROM | | | | | | | 24000000h +-----------------------+ | S I M M | | B A N K 0 | | (16M byte) | 25000000h +-----------------------+ | reserved | 25800000h +-----------------------+ | External I/O | 25FFFFFFh +-----------------------+
22000000h +-----------------------+ | S I M M | | B A N K 0 | | (16MByte) | +-----------------------+ | S I M M | | B A N K 1 | | (16MByte) | 24000000h +-----------------------+ | | | External RAM | | | 25000000h +-----------------------+ | reserved | 25800000h +-----------------------+ | External I/O | 25FFFFFFh +-----------------------+
To explain in more detail, many monitors designed for professional use are also designed to monitor irregular signals, so in some lots of Programming Boxes, the frequency deviation of the color synchronization signal (chroma subcarrier) may occur. It has been confirmed that cases are black and white.
Of course, this does not occur with currently shipped models, but if you experience such symptoms with a previously purchased Programming Box, please contact Sega . This may be corrected by adjusting the output circuit.