#PicoMac

Rundkuchenbrot / PseudoRundkuchenbrot@troet.cafe
2025-05-27

Smarti, Schlepptopf - pöh laaaangweilich
Wer das Ding (wenn es denn einen Akku bekommt) im Zug ausm Rucksack hebt, Tastatur und Maus anschließt und loslegt ... 👀

Zitat:
Ein britischer Bastler hat den Macintosh aus dem Jahre 1984 im Miniformat nachgebaut. Er soll voll funktionsfähig sein
gerade einmal 62 Millimeter hoch

heise.de/news/Winziger-Macinto

#Macintosh #RaspberryPiPico #RaspberryPi #Raspberry #PicoMac

2025-03-21

I have pico-mac playing the system beep on an i2s dac (though when @adafruit @ladyada made a build locally, it didn't work for her, hmmmm, I'll get that sorted tomorrow)

in the process, I discovered an interesting problem that might be randomly corrputing a certain 740 bytes of RAM when pico-mac or umac is configured for a non-power-of-two memory size! github.com/evansm7/umac/issues

the fix seems to be another rom patch:

        /* Fix up the sound buffer as used by BootBeep */
ROM_WR32(0x292, RAM_SIZE - 768);

and is also included in github.com/evansm7/umac/pull/14

you also avoid the problem if you configure pico-mac for 256kB, 512kB, 1024kB, etc.

#marchintosh #picoMac #umac #rp2 #rp2350

2025-03-18

more pico-mac stuffs on adafruit fruit jam with rp2350

left: 512x342 resolution on 640x480 framebuffer with hstx

right: 4MB mac emulated with psram (video reversed "because of reasons")

sadly, placing the main mac RAM in psram slows emulation down considerably. I haven't tried overclocking anything yet, that's for later.

#raspberrypi #rp2350 #picomac #marchintosh #retrocomputing

A photograph of a smallish LCD monitor showing a black & white mac desktop. the mac screen of 512x342 pixels is displayed centered in the 640x480 framebuffer (and then scaled slightly badly by the panel, which has a 1280x720 pixel resolution). some of my regular linux desktop display is visible in the upper part of the image, which overall is dark and indistinct.A photograph of a smallish LCD monitor showing a black & white mac desktop in reverse video. a window slightly above left of the center of the screen says "the macintosh finder" and in the corner of the window it says "4096K."

This screenshot is at 640x480 resolution.
2024-12-26

And now, github.com/evansm7/pico-mac #picomac has been updated to support a VGA res desktop on an RP2040. 🥳

2024-12-17

Yo! I pushed an update to github.com/evansm7/umac and now it can emulate a Mac Plus with unusually large screen resolutions. A couple of the patches to the Mac Plus ROM inform MacOS of the resolution (which just adapts!) and a dozen other hacks get it to draw Happy Mac/Sad Mac/Disc icons in roughly the right shape and roughly the right place. :)
#picomac is next; it looks like for the Mac 208K a VGA display (no borders!) will work well.

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