Tag Archives: hardware

MPF-1B – Z80 Training kit

One from my collection: A training kit for learning to write machine language.

Update: 20220514 – Save and Load a program
Update: 20220829 – Mad-1 computer runaway movie

A little example, life programming a little machine code.

ORG 1800
0E 80              ; LD C,0
21 C0 00           ; LD HL,00C0
CD E4 05           ; CALL 0X05E4
0E 01              ; LD C,0
21 00 01           ; LD HL,0100
CD E4 05           ; CALL 0X05E4
C3 00 18           ; JMP 0X1800

Found this cameo in the movie “Runaway”

Using a tape and COMX-35 cassette player, i can store and retreive programs

Old Skool saving a program
And loading a program

Above i mentioned a Runaway Cameo .. well there is a MAD-1 system cameo also. (Which also i in my collection)

C64 Tape found

Tape i found yesterday

I found a cassette tape yesterday. I was really curious .. dont remember making this.

Connected a tape drive to my C64 and tried to get the damn thing to read the tape.

Commodore tape drive

Got stuck on READY’s with no programs. Being a little rusty into using C64 i tried:

  • L+shiftO
  • shift break
  • LOAD”$”,8
  • LOAD”$”,8,1
  • LOAD”*”,8

Maybe there was a turbo loader used?
Maybe my tape unit wasn’t aligned?

Tried multiple tape units, couldnt find a Tape Head Alignment Program like:

So i used another method to see if data was recoverable.

Using UberCassette or AudioTap

Above are two examples with uses recorded wave files and calculations to generate the original written bits!

Recorded the tape to mono wav file using a generic linux recording application.

ubercassette taperecording.wav mytape.tap 

Started to build a Drawbridge

For my amiga i started to build a floppy disk reader/writer using a arduino.
I found a superb project by rob smith.
It uses only a arduino pro and a FTDI USB to serial breakout board, to raw read and write disks.
I wanted to convert my own created amiga disks to PC image to use in a emulator like vice.

http://amiga.robsmithdev.co.uk/instructions/promini

I’m not going to copy his website, with all instructions. Only my personal experiences.

Starting with … don’t use a IDE cable, and start soldering .. it is a diskdrive cable .. connector doesn’t fit! ..

Getting components and flashing arduino … no brainer

How many vlan’s are enough?

Many years ago i started segmenting my network using vlans.

In 2022 i started to reconfigure my lab and using a lot more Mikrotik switches.
So how many … is to many, because i always overdo stuff.

Well .. is 9 to many for home environments?

  • default vlan – did’t bother to configure
  • old DMZ .. to be migrated
  • DMZ – my servers live here
  • Wifi personal workstations – Mobiles and laptops .. macaddress limited
  • IOT – only arduino’s, raspberries and other hardware live here
  • Personal workstations – UTP connected workstations with less networking limitations
  • LAB – My lab environment, Ovirt virtualisation for fun and manage access to servers in dmz
  • Storage – my SFP enabled all-flash storage
  • Management – really tight restricted access to management interfaces (switches/routers/storage/ILO)

Hard to manage? All those vlan’s? .. Sure, but i learn a lot!
(Not really .. when you got the basics down, more of the same.
Hardest part? .. not cutting-off connections/switchports you are using!)

Working Amiga 500

Got a working amiga again. \o/ woot
Needed to replace Paula chip, cleaning and some TLC.

Modulator
Chip donor

Scart cable i’ve got is one without the resistors, so my monitor isn’t detecting the signal.
Using a A520 modulator works. At least RF, don’t know why RCA/composite video isn’t working.

Even a memory expansion and second drive (5.24 inch) are working.

One of the first disks i tested

To do:

  • Fix something to get disk images from and to my pc.
  • (My old catweasel card only fits in a ISA slot which i don’t have any more)
  • I was wrong .. i’ve got a IV Catweasel .. PCI it is
  • Fix scart
  • Fix my Action Replay, which i soldered into a non working state apparently .. 🙂
  • Get a better mouse!
Catweasel IV

Disks to convert:

  • Personal text files from ages ago
  • My first seka demo
  • My oscillator drawing program
  • Other assembly source files

Got another one running today also:

Old hardware hacks

This page is a ‘work in progress’ page .. i’ll keep adding info

Somewhere 90s

  • Oscilloscope drawing
  • Joystick with memory
  • Laser drawing using videodisc mirror’s
  • Amiga keyboard hack
  • Crt monitor hack
  • First copperbar (before i knew it was a thing) on a hercules monitor
  • Floppy boot demo with EDK
  • Own build webcam with x,y movement using stepper motors, and a analog (rca) camera
  • Reverse engineering stuff like a led scroller bar
  • Sid chip in a amiga
  • Own build 8bit computer

My Electronics Lab

Update: 20220829 – Microscope G1200

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Tools:

Bought some boxes for chips

Wannahaves

Fun .. but do i need it?

HackRF One

HackRF One from Great Scott Gadgets is a Software Defined Radio peripheral capable of transmission or reception of radio signals from 1 MHz to 6 GHz. Designed to enable test and development of modern and next generation radio technologies, HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation.

  • 1 MHz to 6 GHz operating frequency
  • half-duplex transceiver
  • up to 20 million samples per second
  • 8-bit quadrature samples (8-bit I and 8-bit Q)
  • compatible with GNU Radio, SDR#, and more
  • software-configurable RX and TX gain and baseband filter
  • software-controlled antenna port power (50 mA at 3.3 V)
  • SMA female antenna connector
  • SMA female clock input and output for synchronization
  • convenient buttons for programming
  • internal pin headers for expansion
  • Hi-Speed USB 2.0
  • USB-powered
  • open source hardware

I’ve got dvb alternative below now. Hackrf cannot be bought anymore

Gemini PDA

Android / Linux PDA

ALTAIR 8800 EMULATOR KIT

The Altair 8800 is a microcomputer designed in 1974 and based on the intel 8080 CPU. Using only switches to program and leds for output.
Even my DIY build computer has a hex keyboard input and 7segments display.

Omnicharge 20+ Usb C Wireless Power Bank 20,000mAh Power Delivery 3.0 + Quick Charge 3.0

You can use this as a mobile soldering station using a TS100 soldering iron.

Rigol Oscilloscope DS1054

SDCard reader for C64 and other commodore machines

Got this one now, superb. Will post about this

 Tv Stick Dab Fm Dvb-t RTL2832 R820T Sdr RTL-SDR Dongle Stick Digitale Tv Tuner Ontvanger TVSDVBS816

Update : got this one, review later on.

Clear case for amiga and tank mouse

OldSkool Computer Cartridges/expansions/add-ons

(Todo : add photos/designs )

Amiga:

Action Replay IIOwned since … 80s 90s?

Modded this one, as part of my modular
amiga system where i wanted to remake
every part onto 10×15 euro prints. So i could
swap things out for other boards.
Memory expansion512k .. missing in action
Go a new one in … ?
Boot selectorSwaps df0 and df1
DIY version was a wirewrap ic socket with a cross switch, now i have a Gotek buffered switching module with can be actvated with a keystroke.
(Gotek post)
Keyboard modHidden key (in the space of the stands, which triggered a extra key stroke)
Kickstart selectorA print you can insert in the ROM socket of your amiga. Had only 1.2 and 1.3.
Now there are many .. like diagnostic roms.
I made a altered 1.2 version .. which was unusable .. i f*cked it up
SID modAdded a sid parallel on the 8020 CIA chip
Gotek driver emulatorI made a arduino version to read disks. (Other post)
But this is a disk image drive emulator.
See Gotek post
Boot sector warnPiezo beeper which warned me when a boot sector was being written (virus alert)
Sound filter fixAmiga audio filter enhancer, using capacitors and resistors

C64:

Final Cartridge III
Led modMemory activation leds
KCS Power CartridgeSepp’s old cartridge?
Rom selectorDIY rom selector
Data Manager 2Can’t find anything on this one on other sites !?!?!
https://www.henriaanstoot.nl/2022/07/17/mystery-cartridge-c64/

Atari:

Vic-20:

Reset modDIY reset mod
ROM selectorDIY ROM selector
Many cartridgesSold in 2022, kept only some useful once’s

PC:

PC speaker modSpeaker to audio jack
Seek time monitorWhen a seek took too long, LEDs would light up, time to defrag!
Covox modA pre sound card parallel to audio resistor bridge.
Only a few demo’s and games supported this mod.
VGA to scartDisplay hack
VGA to Scart hack

Monitor:

Monitor modDIY horizontal flip using relays
Color modGreyscale / RGB switcher

Generic:

Joystick recorderrecorded movements when playing a game, so it could replay parts.