Steffi · @stefanie
101 followers · 1030 posts · Server social.anoxinon.de

Ok, Read speed test is done!

Interesting note, the write speed test uses BDOS calls, while the read test uses BIOS calls. The latter is a little bit faster, and achieves 14kB/s on a bit-banged SD-card.

Check it out here:
github.com/Stefanie80/CPM3_206

#cpm #cpmplus #z80

Last updated 1 year ago

Steffi · @stefanie
100 followers · 1028 posts · Server social.anoxinon.de

Short call, but i just got home.
Will be live at 18:15, in roughly 20 minutes.
Lets code on CP/M Plus & Z80!

makertube.net/w/9ftm9Vj1KHiMhQ

#cpm #cpmplus #z80

Last updated 1 year ago

Steffi · @stefanie
100 followers · 1007 posts · Server social.anoxinon.de

My Drive Tool for CP/M Plus is almost done.

What it already does:
-Save Boottracks to File
-Write File to Boottracks
-Wipe Directory
-Write Speed test

What may work:
-Wipe Drive. This may get the number of tracks wrong and might damage a real floppy drive

What isn't implemented:
-Read speed test

Go ahead, give it a try and fix you broken directories:

github.com/Stefanie80/CPM3_206

(only for CP/M 3 on Z80)

#cpm #cpmplus #z80

Last updated 1 year ago

Alexander Janßen · @itnomad
64 followers · 765 posts · Server ruhr.social

Just a small patch to write core & CPU-state at runtime for Udo Munk's z80sim. Shall implement the reverse operation, too.

blog.ynfonatic.de/2023/09/10/f

#z80 #z80pack #emulators

Last updated 1 year ago

Emily🏳️‍⚧️ · @emily
476 followers · 1561 posts · Server hackaday.social

CPU from 1978, and the VGA Terminal board; both boards from @rc2014 for the

Looking forward to slowing down the clock board and seeing if this old CPU fires up...

#z80 #rp2040 #rc2014 #retrocomputing

Last updated 1 year ago

webdoktor · @masterhit
21 followers · 57 posts · Server tiz.social

Peoples Computer Company, Jan 1977, highest quality, The paper is nearly rotten, you can see it on the first and last sides. Getting more routine in scanning.

drive.google.com/file/d/1iramU

#retrocomputing #pcc #z80 #mos6502 #oldschool #magazine #newspaper

Last updated 1 year ago

Kroc Camen · @kroc
66 followers · 593 posts · Server mstdn.social
dirk dierickx · @dirkdierickx
63 followers · 479 posts · Server mastodon-belgium.be

Got a based computer? Then you need CP/M, LokiOS is a new, modern implementation.

github.com/cj7hawk/LokiOS



#z80 #retrocomputing

Last updated 1 year ago

webdoktor · @masterhit
21 followers · 56 posts · Server tiz.social

Peoples Computer Company, March 1977, highest quality, minor issues with my light, but flatened with a glass pane. Looks good. Time to digitize 25 mins
drive.google.com/file/d/1r6nj_

#retrocomputing #pcc #z80 #mos6502 #oldschool #magazine #newspaper

Last updated 1 year ago

Retro Gerry · @gerrykelly
369 followers · 562 posts · Server mastodon.gamedev.place

so going on a holiday with the wife this week. it involves a flight to "that there" london, a 5 hour layover and then 9 hour flight.
so a lot of reading time without the web. I'm not taking a laptop, only an android tablet. so I'm loading it up with issues of old Amstrad Computer User as theres some nice z80 guides in there.

so, anyone recommend any other older magazines with good guides spectrum or cpc would probably be my first choice but open to suggestions

#z80

Last updated 1 year ago

junkman · @junkman
156 followers · 36 posts · Server social.sdf.org

The PacComm advertisement claims this TNC ran for 2 full days off a 9 volt battery.
🤔

This is basically a full Z80 computer with SIO and 32k ram.
(eprom is missing in this photo)
The printer option would have added an Intel 8255 4pin IC.

I guess they made 9 volt batteries stronger back in the 1980s lol

#packetradio #hamradio #z80

Last updated 1 year ago

Bread80 · @bread80
237 followers · 1176 posts · Server mstdn.social

I'm adding typecasts to the . This is the next step toward full function support. In typecast syntax is the same as a function.

b := integer(a);

This gives me the hooks I need to call functions within expressions and handle the return value. But typecasts generate inline code so I don't have to do stack frames yet.

#z80 #pascal #compiler #quiche

Last updated 1 year ago

Retro Gerry · @gerrykelly
369 followers · 562 posts · Server mastodon.gamedev.place

Doodling and scribbling notes for ideas to use .

I have procedural generated dungeon maker script that i wrote years ago in php for another project that im thinking would make a good test project to convert to z80 to do some with it.
(Php script geraldkelly.co.uk/games/dungeo
Its totally not optimised. Its just a proof of concept thing)

Im just starting my notes on what sort of functions or memory labels and variables etc I'll need and already I think i have to de- bug it all.

#gamedev #z80

Last updated 1 year ago

Renaissance Dork · @redork
14 followers · 33 posts · Server social.vivaldi.net

Delighted to receive my Z-1 replica from The High Nibble! Now I just need to find time to start assembling! thehighnibble.com

#retrocomputing #vintagecomputing #z80 #computerhistory

Last updated 1 year ago

Wikinaut · @wikinaut
967 followers · 10233 posts · Server berlin.social

@Weizenbaum_Institut

Gerade bei mir gefunden:
-Programm für (Code von 1979-1980

#z80 #Eliza

Last updated 1 year ago

Retro Gerry · @gerrykelly
369 followers · 562 posts · Server mastodon.gamedev.place

@raymierussell @Wintermute_BBS

this is the one I found interesting today,
a great read on the way the arcade game "space invaders" works from an assembly coding point of view. not neccesarily the best way lol...

computerarcheology.com/Arcade/

whats great is after only a month of making an effort to learn z80, I can follow this sort of stuff now lol. its great if your learning z80 with an aim to make games to see how things can be done.

#retrogaming #z80 #assembly #machinecode

Last updated 1 year ago

Mark · @mpcnat
152 followers · 673 posts · Server bne.social

Amazing 🤯 build on essentially a modern Retro Computer.

mastodon.social/@c_discussions

#z80 #retrocomputing

Last updated 1 year ago

Retro Gerry · @gerrykelly
369 followers · 562 posts · Server mastodon.gamedev.place

Newbie type Question for types in case im missing it or doing it wrong.

Is there a quicker way to get both nibbles from a byte. Not a BCD though. So to take a byte in register a,put each nibble into hl i do some shifts to right then left and a subtraction.
Is there mabe a command im missing, some binary math invert wizardry or is this a acceptable way to do this.

Ld a, %11111010
Ld h,a
Srl h
Srl h
Srl h
Srl h
Ld e, h
Sla e
Sla e
Sla e
Sla e
Sub e
Ld l, a

#z80 #assemblyprogramming

Last updated 1 year ago

Jason Thorpe · @thorpej
219 followers · 546 posts · Server mastodon.sdf.org

Hey Tooters... if you were building a new 8-bit machine with lots of RAM, and you had 2 banked RAM regions (one 32KB, one 8KB), which configuration would you rather have? Basically, how would you distribute 2MB + 512KB? #6809 #6502

#8bit #retrocomputing #z80

Last updated 1 year ago

Raymond Russell · @raymierussell
248 followers · 3255 posts · Server mastodon.scot

Have done some more additional work on my not quite a game yet.

The sprite is now 'animated', has bit more character (eyes) and is now located at the bottom of the screen.

I have narrowed the playing area.

As before the the sprite moves continually and only changes direction if it reaches the end of the screen or the user presses the space bar.

Additionally there is a 'bolt of lightning' that comes from the top of the screen. As of yet with no affect.

#dev #z80 #zxspectrum

Last updated 1 year ago