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update to README

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Philip Smart
2026-04-03 12:28:18 +01:00
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<font style="color: green;" size="4">&nbsp; <b>Update April 2026</b> - A CPLD synchronisation bug was removed and the logic hardened making it more stable. The v1.2 hardware is fully functional and has been tested on my MZ-80A, MZ-700 and MZ-1500 using the EXT700 adapter and in the MZ-2000 expansion unit. The CPLD logic (VHDL) is complete and all ROM/RAM paging and host-mode logic works correctly. The Rom Filing System software ported to the SFD-700 is functional for FDC operations (floppy boot via 'FL' command, directory via 'FD' command and a FC command to save memory to a floppy file). The floppy disk code for an MZ700 and MZ80A has been built into the RFS firmware and auto selects based on the jumper configuration. The board hasnt been tested in other MZ series machines, hopefully I will do this in due course.</font>
<font style="color: green;" size="4">&nbsp; <b>Update April 2026</b> - A CPLD synchronisation bug was removed and the logic hardened making it more stable. It is advised to put a wire between one of the boards mounting holes and the MZ700 metal chassis as the grounding via the expansion port and joystick 5v pickup is insufficient. The v1.2 hardware is fully functional and has been tested on my MZ-80A, MZ-700 and MZ-1500 using the EXT700 adapter and in the MZ-2000 expansion unit. The CPLD logic (VHDL) is complete and all ROM/RAM paging and host-mode logic works correctly. The Rom Filing System software ported to the SFD-700 is functional for FDC operations (floppy boot via 'FL' command, directory via 'FD' command and a FC command to save memory to a floppy file). The floppy disk code for an MZ700 and MZ80A has been built into the RFS firmware and auto selects based on the jumper configuration. The board hasnt been tested in other MZ series machines, hopefully I will do this in due course.</font>
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One of the most needed accessories for the Sharp MZ series is the venerable Floppy Disk Controller. These are in relative short supply as not many people used them, mainly due to cost during the Sharp MZ era.