Sharp MZ

Good observation. This one is lurking outside the page. What would be the purpose? Hoping to be scooted in the top of Google pages with "fisting" key? well that's not the best place... I really doubt there is a big activity on SHARP MZ pages...

Sorry I mistakely rewrote ysblokje post but I was able to reinstitate his post (pfewwww!) through the browser history (thanks to its cache, I huess). but boy is that graphics hardware funky to me. I started my .asm coding on x86 with good old VGA where a pixel is a byte like the gods intended! You m...

Did you follow the guidelines for how to connect Gotek pins to a QD-drive interface? that's quite different from the Gotek pins to connect a FD-drive interface. https://torlus.com/floppy/forum/viewtop ... 010#p21010

I took a MeanWheel. I don't recall which one. Look at the bottom of the MZ-800 to see how many W it delivers. Take the MeanWheel with a power a little higher that the demanded one. For instance, if you look for 20W, I would consider this one : https://fr.farnell.com/mean-well/rs-25-5/power-supply-ac...

I don't recall there were MZ-800/NTSC so the chance to find a 110V version of MZ-800 PSU are close to zero. But you can replace the PSU block with a generic PSU which can deliver 5V as I did for a MZ-1500.

I know I had a discussion with him on FB and advised him to send you a release to test. Be aware mz-700 mode is not fully compatible with genuine MZ-700 in the end. I saw the "added" source for the MZ-700 hardware compatibilty in Chaky's emulator (I wish it had been under GIT and not SVN) ...

Ok, so your two-clock circuit is extending the MARK if necessary. That is what I wanted to do more or less few years ago with the idea to add a fast SRAM to replace the DRAM. Full speed when running in SRAM, original speed otherwise. But there was still the issue with memory or I/O port access to mo...

Oh yeah, the ICS501M takes a CLK signal (so the CPU one in my case) and will multiply it by N (x5 in my case). There is some input pins to select N (0 or 1 or N.C). Note that CLKout(t) == CLKin(t) when t % N = 0. So basically, I could reuse your trick with the original CLK and the 5 x CLK. I still h...

In terms of your switching, have a look at the schematic below, (top right, IC's U9A, U4B, U9B, U14A/B, U9C, U9D, U1B), the two clocks go into dual D-Type flip flops, each clocked on their own clock and linked to the D input of the other. When the control signal (output of U4A) for Hi/Low speed cha...

The overclocking part of the schematic reminds me of MZ-80 K overclocking. I need to see the timing drawing to figure out how it will behave. I'm in the extremely case when there is no fast memory storage (no SRAM, no FLASH): - SLOW = (/MREQ = 0 OR /IORQ = 0) AND (/RD = 0 OR /WR = 0) [AND (/CLK = 0-...