Tim Holyoake<p>If you want to play with my Pico MZ-80K/A emulator, this weekend is a good time to buy the hardware from Pimoroni as there's 50% of their VGA demo base and 25% off a Pico 2. An MZ-80K and MZ-80A for less than £15! </p><p>More info on the emulator here: <a href="https://z80.timholyoake.uk/the-pico-mz-80k/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">z80.timholyoake.uk/the-pico-mz</span><span class="invisible">-80k/</span></a></p><p><a href="https://oldbytes.space/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RetroComputing</span></a> <a href="https://oldbytes.space/tags/PicoMZ80K" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PicoMZ80K</span></a> <a href="https://oldbytes.space/tags/PicoMZ80A" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PicoMZ80A</span></a> <a href="https://oldbytes.space/tags/Sharp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sharp</span></a></p>
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#picomz80a
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Tim Holyoake<p>Here's an interesting "feature" of the MZ-80A monitor ROM. Depending on whether the screen is addressed by the monitor or 'poked' to from BASIC, some ASCII codes have a different effect.</p><p>It's most noticeable (at the moment) during emulator startup as the monitor is attempting to clear the screen by scrolling it downwards (Sharp ASCII 104). But my emulator assumes you are 'poking' 104 (0xCF) ... which happens to be a face in the Sharp display codes.</p><p>Should be easy enough to craft a fix, as I know where the program counter is when the vga display routines are called. I think!</p><p><a href="https://oldbytes.space/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RetroComputing</span></a> <a href="https://oldbytes.space/tags/PicoMZ80K" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PicoMZ80K</span></a> <a href="https://oldbytes.space/tags/PicoMZ80A" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PicoMZ80A</span></a></p>
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