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* Unified chipset clock at 100 MHz. * Changed read signal to uart module. * Changed cen_opl2 signal. * Improved access speed to SDRAM. * Control sdram refresh execution timing. * Fixed KF8237. * Wired between Timer 1 output and DMA0 request. * Fix VRAM CGA and loader for XTIDE. * IBM5160 BIOS downloader. * Fix indentations in make_boot_with_ibm5160. * Tandy graphics selectable from the OSD. * EMS pages frame update. * fix a comment on addressable memory. * boot.rom up to 64Kb + 16Kb for XTIDE. * Dummy LPT1. * Update of ROM download scripts. * Simple improvements to PCXT.sdc. * Correct use of address_enable_n signal in ports and memory accesses. * Initial improvements in Tandy sound implementation. * Improvements to the implementation of Tandy video