#SharpMZ80K
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timholyoake.uk
Look what the postie brought! I've been looking for a copy of this for years 😊

#RetroComputing #SharpMZ80K #Z80
A manual and cassette tape, machine language for the Sharp MZ-80K.
February 7, 2025 at 12:02 PM
timholyoake.uk
It's a new year and I'm back to enhancing my #SharpMZ80K emulator.

#RetroComputing #Z80

z80.timholyoake.uk/pico-mz-80k-...
A game of space invaders in progress. The RC2014 backplane with the RP2040 VGA terminal card is in the foreground.
January 8, 2025 at 6:57 PM
timholyoake.uk
Latest #SharpMZ80K #RetroComputing post from me:

Fang, Claw and Knight’s WEE #FORTRAN - now updated with a patch for real numbers!

z80.timholyoake.uk/fang-claw-an...
Fang, Claw and Knight’s WEE FORTRAN – retrocomputing ephemera
z80.timholyoake.uk
July 19, 2025 at 3:34 PM
timholyoake.uk
Pico MZ-80K release 1.2.0 is now available, including support for the #RC2014 RP2040 VGA Terminal Card.

z80.timholyoake.uk/pico-mz-80k-...

#RetroComputing #PicoMZ80K #SharpMZ80K #RaspberryPi
A RC2014 backplane 8 with a RP2040 VGA Terminal Card installed. The card has had an expansion header fitted and a passive buzzer is attached to GPIO23 through it to provide sound for the Pico MZ-80K firmware that has been installed onto it.
January 10, 2025 at 2:00 PM
timholyoake.uk
New from me: Calculating the date of Easter Sunday for all years from 1753 onwards ...

z80.timholyoake.uk/happy-easter/

#RetroComputing #BASIC #SharpMZ80K #PicoMZ80K #Easter
The dates of Easter Sunday for 2025 - 2035 inclusive, as calculated in BASIC by the PicoMZ80K/A
April 19, 2025 at 4:16 PM
timholyoake.uk
Pico 2 support for my Pico MZ-80K emulator is now available!

z80.timholyoake.uk/pico-mz-80k-...

#RaspberryPico #RaspberryPico2 #SharpMZ80K #RetroComputing

At least I've finished just in time to think about #AdventOfCode ... I'll probably pick a suitably old dialect of #Fortran this year ...
A Raspberry Pico 2 microcontroller, installed into a Pimoroni VGA demo base. The software installed is the Pico MZ-80K, an emulator wot I wrote for the venerable Sharp MZ-80K.
November 22, 2024 at 5:53 PM
timholyoake.uk
New from me: Monster Chase, Part 2.

z80.timholyoake.uk/monster-chas...

#RetroComputing #RetroGaming #PicoMZ80K #SharpMZ80K #BASIC
A game of Monster Chase in progress. The screenshot shows a grid of 30x16 characters. A dot represents a blank square, the yen symbol the monster and a stick figure is used for the player. * means a square has a gold piece on it. Currently, the player has made 5 moves, collected one gold piece and has a score of 1.
July 7, 2025 at 9:48 PM
timholyoake.uk
Quote me with your first computer.

#SharpMZ80K Christmas 1981. I still have it in working order.

I also recreated it on a #RaspberryPi Pico for #RetroChallenge in October!

z80.timholyoake.uk/retrochallen...
A Sharp MZ-80K microcomputer from 1981.
November 24, 2024 at 7:54 PM
timholyoake.uk
New from me: Fang, Claw and Knight's WEE FORTRAN

z80.timholyoake.uk/fang-claw-an...

#RetroComputing #SharpMZ80K
Fang, Claw and Knight’s WEE FORTRAN – retrocomputing ephemera
z80.timholyoake.uk
July 18, 2025 at 1:35 PM
timholyoake.uk
The quest to emulate 5 1/4" floppy disks on the Pico MZ-80K continues ...

z80.timholyoake.uk/pico-mz-80k-...

#RetroComputing #SharpMZ80K
A cartoon from the Sharp Disk BASIC manual for the MZ-80K. A floppy disk is telling a user that the pencil they are using to write the disk label with is too hard, and that it should be "the soft one".
November 16, 2024 at 11:05 AM
timholyoake.uk
Taking a break from the Pico MZ-80K emulator over December seems to have done wonders for my debugging brain. I think I've finally managed to properly sort the keyboard handling so that the F9 kludge is no longer necessary! Testing so far is encouraging ...

#RetroComputing #SharpMZ80K #PicoMZ80K
January 11, 2025 at 10:12 AM
timholyoake.uk
Reading emulated floppies on Pico MZ-80K seems about right now, but writing -that's not working very well at all. Enough for me to make a bootable disk, but with nothing on it.

Current theory - there's a signal I'm missing that controls stopping a write after x sectors

#RetroComputing #SharpMZ80K
November 19, 2024 at 8:50 PM