Commodore Amiga 2000 Power Supply repair

February 16th, 2015 2 comments

I lost too much time to repair only one of two psu, not convenient. Better to replace only the PCB with a ATX power supply (only the PCB!)

Defect:

  • Dead.

Replaced components:

  • 2 x Diode IN4001
  • 1 x Diode Zener 5v1
  • 1 x Triac BTB 16 200B (recovered from another power supply)
  • 6 x Electrolytic Capacitors.
  • 1 x Power supply plug with a filter RIFA inside.

Bidding ended to €20.050,00 for the Commodore 65 on Ebay.fr

February 15th, 2015 No comments
Categories: Event(s), News & Rumors, Today

15 x Commodore 64 Repair

February 13th, 2015 1 comment

Click to view original size

I have repaired last year these computers for a dear friend.

Commodore 64 #1

Defect:

  • Black Screen.

Replaced parts:

  • Replaced 4 x 4264 RAM (U9,U10,U11,U12)

Commodore 64 #2

Defect:

  • Out of Memory.
  • Expansion Port (Cartridge) don’t works.

Replaced parts:

  • Replaced 3 x 4264 RAM (U12,U24,U22)
  • PCB track interrupted of the expansion port (A5 Address Line). Fixed with a bridge.

Commodore 64 #3

Defect:

  • Garbled screen and then Out of Memory.

Replaced parts:

  • Replaced 4 x 4264 RAM (U24,U12)
  • Replaced 1 x 74LS257 Data Selectors/Multiplexers (U13)

Commodore 64 #4

Defect:

  • Black Screen and then Out of Memory.
  • No Sound.

Replaced parts:

  • Replaced 2 x 4264 RAM (U9,U10)
  • Replaced 1 x 74LS257 Data Selectors/Multiplexers (U25)
  • Replaced 1 x 6581 SID (U18)

Read more…

2 x Commodore 128 Repair

February 13th, 2015 No comments

Clicca per ingrandire l’immagine

I have repaired last year these computers for a dear friend.

Commodore 128 #1

Defect:

  • Black Screen.
  • Missing CAS on PIN 1-4 of the 74LS32 (U9)
  • Missing CHROMA video.

Fix:

  • To fix the problem of lack CAS on 74LS32 i had to make a bridge from the PIN 41 of the PLA 8721 because a pcb track under the socket was interrupted.
  • Broken solder joints on the RF Modulator.

Commodore 128 #2

Defect:

  • Black Screen but sometimes it works.

Replaced parts:

  • Replaced the socket of the 8721 PLA.
  • Replaced 8721 PLA (U11).

Note:

The main problem was the PLA. In the C128 mode sometimes works and sometimes not. Works always C64 mode.

Atari Dos: SpartaDOS X v4.47

February 12th, 2015 1 comment

SpartaDOS X (or SpartaDOS 4.0) is a disk operating system for the Atari 8-bit family of computers, that closely resembles MS-DOS. It was developed and sold by ICD, Inc. in 1987-93.

Ten years later SpartaDOS X considered abandonware has been picked up by its enthusiasts, and developed further. These unofficial revisions, incorporating many of the utilities written since 1992, cleaning many identified problems and including numerous improvements, are:

  • v4.31 (2005)
  • v4.39RC (2006)
  • v4.40 (a leaked-out beta, 2006)
  • v4.41 (Feb. 2008)
  • v4.42 (Dec. 2008)
  • v4.43 (Apr.2011)
  • v4.44 (Jun.2011)
  • v4.45 (Nov.2011)
  • v4.46 (Jan.2013)
  • v4.47 (Feb 2015)

The new SpartaDOS X 4.47 runs on the following hardware platforms:

  • intSDX128 and intSDX128 “flash”
  • IDE Plus 2.0 interface (*)
  • Maxflash 1Mb
  • Maxflash 8Mb (*)
  • Maxflash MyIDE+Flash
  • MyIDE II
  • SIC! Cartridge 256k (*)
  • SIC! Cartridge 128k
  • SIDE HDD cartridge (*)
  • SIDE2 HDD cartridge (*)
  • Turbo Freezer 2005 (*) (**)
  • Ultimate1MB (*)
  • Incognito board (*) (***)
  • Altirra and Atari800 emulators

(*) – includes MAN on-line help
(**) – use with Freezer ROM only
(***) – compatible with Ultimate1MB images

Dowload:

source: sdx.atari8.info wikipedia

Categories: Atari, News & Rumors, Today

Lear Siegler (LSI) ADM-5

February 11th, 2015 No comments
Lear Siegler (LSI) ADM-5

I have recovered this Terminal from the United States because it was in good condition and partially working.

The cleaning took more time of the repair. The repair was very simply. I have replaced for precaution all tantalum capacitors and i have also replaced the two micro switches that are completely rusted.

The main defect was caused by one of these two micro switches which was in short circuit always in one position. I have also made a calibration of the geometry of the screen that appeared incorrect and a focus adjustment.

Below i post all pictures of the cleaning, components replaced, various console test that i have made via terminal and two videos.

A brief introduction of the ADM-5 terminal:

The Lear Siegler ADM-5 was introduced in January, 1981 at a price of $995 and is based on the proven Lear Siegler ADM-3 design.

This new version includes:

  • Numeric keypad.
  • Reverse video.
  • Reduced intensity video.
  • Limited editing capabilities.
  • Estension port.
  • Lowercase display.

Lear Siegler (LSI) ADM-5 the final reult:

Replacing tantalum capacitors and mini switches:

Cleaning main pcb:

Radio Shack DT-1 (pcb) vs Lear Siegler ADM-5 (pcb):

Testing:

Video:

C64 Game: Zombi Terror / Scramble +5H / Xain / Demoni 101% …

February 10th, 2015 No comments

Some new games or tools (Cracked / Trained or Unrealeased) for Commodore 64 have been released from your favorites groups.

Titles:

  • Assembloids Basic +2
  • Maniac Mansion Demo Disk
  • Demoni 101% +4DGHF
  • Charlie and the Jugs +4HD
  • Scramble
  • Scramble +3 V2
  • Scramble +3 V1
  • Xain +
  • Populous Preview
  • Xain
  • The Eidolon +6D
  • Baffle 101% +2HF [pal/ntsc]
  • Scramble +5H
  • Scramble V1.1
  • Rocket Smash EX [64kb cartridge]
  • Rocket Smash EX +3DH
  • Q10 Tankbuster +24D [crazy hack]
  • Bumble-Bee HS
  • Zombi Terror
  • C64hess – Chess Puzzles +D
  • Ski Jumping &ED

Download: All Games in One Archive (386)

source: csdb.dk

Commodore Amiga 2500 (A2000 Motherboard) Black Screen Repair

February 10th, 2015 No comments

Click to view original size

I have repaired a Commodore Amiga 2500 (A2000 Motherboard) with Black Screen for a dear friend.

Click to view original size

Defect:

  • Black Screen.

Diagnosis:

  • The Battery Acid has corroded a track (not visible to the naked eye) connected to the PIN 10 of the resistor packs RP900 and then the same track is connected to the CPU.

Repair:

  • I have made a small bridge between the two points on the solder side of the pcb  and the problem was fixed in 5 minutes.

3 x Commodore Amiga 4000 Motherboards / CPU Cards Restoration

February 10th, 2015 No comments

Click to view original size

I have fixed 3 x Commodore Amiga 4000 Motherboards and 2 x Commodore Amiga CPU Cards for a dear friend. Below the description and photo of each repair.

Click to view original size

Commodore Amiga 4000 Motherboard #1:

  • I have done an accurate cleaning of the leaked battery acid even in the holes between pcb layers.
  • Replaced some SMD electrolytic capacitors with a high ESR value.

Click to view original size

Commodore Amiga 4000 Motherboard #2:

  • I have done an accurate cleaning of the leaked battery acid even in the holes between pcb layers.
  • Replaced all SMD electrolytic capacitors with a high ESR value.

Click to view original size

Commodore Amiga 4000 Motherboard #3:

  • I have done an accurate cleaning of the leaked battery acid even in the holes between pcb layers. I have also made a “bridge” because a track of the pcb was completely corroded.
  • Replaced all SMD electrolytic capacitors with a high ESR value.

Still a couple of months with the battery acid and this Amiga was to throw in the trash.

Click to view original size

Commodore A3640:

  • Replaced all SMD electrolytic capacitors with a high ESR value and a first acid leak.

Fixed the problem of the 3 capacitors installed with the wrong polarity. The silkscreen on the pcb are wrong. Thanks Commodore.

Click to view original size

Commodore A4CPU EC030:

  • Replaced all SMD electrolytic capacitors with a high ESR value.

Dick Smith Wizzard (Creativision) Cassette Storage Module

February 10th, 2015 No comments
Dick Smith Wizzard (Creativision) Cassette Storage Module

Gallery:

The Dick Smith Wizzard (Creativision) Cassette Storage Module is a mass storage expansion for the Dick Smith Wizzard.

Using the Dick Smith Wizzard Basic allow you to load and save program which you enter in the computer. By recording a program on a tape, you can save it as permanent record. Later you can load the program from cassette tape into the computer’s memory if you want to use that program again.

Cassette Storage Module – Tape Loading:

source: madrigaldesign.it

Atari 800XL Upgrade: VBXe / Simple Stereo + U-Switch / Side 2

February 4th, 2015 No comments
Zoe is trying to play at Donkey Kong

Atari 800XL Upgrading.

Installation and preparing:

  • VBXE v2.1 Interface Installation.
  • Simple Stereo + U-Switch Installation.
  • Formatting and partitioning CF Card (Sandisk ULTRA 2Gb) for the SIDE 2 Cartridge/SDX.

Software update:

  • Update the Ultimate 1MB (First batch 2011) Flash AM29040BL.
  • Update Ultimate 1MB (First batch 2011) Xilinx XC95144XL JTAG Firmware (v1 to v2)

Upgrade/Fix:

  • Fixed some wrong connections of the old installation from the Ultimate 1MB to the Atari 800XL PCB.
  • Removed the RF Modulator and installation of a Female DIN (8 pin + GND) for the RGB output + RGB CTRL + SYNC + AUDIO (Stereo)
  • I have also made a cable from a male DIN (8 pin) to Scart, fully shielded of a four meters lengths.

All these interfaces can be purchased on the lotharek website.

Some photos of the installation:

The original Black CD Caddy for Commodore CDTV

February 2nd, 2015 No comments

I must thank Andrea Pierdomenico for The original Black CD Caddy for Commodore CDTV.

A new donation from Andrea Pierdomenico

February 2nd, 2015 No comments

I thank Andrea Pierdomenico for the donation.

Electronic components donated:

  • 1 x ST 27256 Eprom
  • 1 x ST 27128 Eprom
  • 2 x TMS 2516 Eprom
  • 3 x ST/AMD 27512 Eprom
  • 4 x HY/Intel/TI 2732 Eprom
  • 5 x FlashROM Winbond 29C020
  • 15 x TI32-GERMES Eprom (2516 Compatible)
  • 18 x TI32-SYN Eprom (2532* Compatible)

* Not Confirmed.

Categories: Donations, News & Rumors, Today

YMT-Player v1.01 + Source by Peter Jørgensen (aka: Fedepede)

January 20th, 2015 No comments

YMT-Player is a player that allow you to play Project-Ymer YMT files (Windows) on the Atari ST. The program is made by Peter Jørgensen aka. fedepede.

What is Project-Ymer YMT files ?

YMT files are like the YM/AY files. Music files where you sampled data from the sound chip register (YM2149/AY8910) in a certain interval, instead of having a dedicate player. Up to now (to my knowledge), there have only been YM/AY player that could play tune/score files, that was sampled at 50HZ, but the YMT player can play files up to 300hz (there are some 50hz+ tunes/scores include in the examples)

The advantaged of AY/YM/YMT format, is that to replay these tunes/scores cost very little CPU power, so if you need a lot power for a eg. a 3D demo, when it could be a wise choice to use it, because it leaves most of the CPU power for 3D calculations and the graphic etc, and the disadvantaged is that it use a lot of memory, and also that it is nearly impossible to make a routine that can capture and use the SID sound and Samples etc. It is also why those files need to be hand made, that is the reason why YMT-Player only support pure YM2149 sound.

The zip archive contains the Floppy/HD version and Sources.

Changelog:

Ymt-Play Ver 1.01 Release Date 16.Jan.2015

  • Reactivate the clear screen function when the program start.. I deactivate it ,  so I could tested the program, but I forgot to turned on it again.

Download: YMT-Player v1.01 + Sources (345)

The Program in action on Youtube.

source: fedepede04.dk

Categories: Atari, News & Rumors, Today

TMS 9900 CPU Key Ring

January 18th, 2015 1 comment
TMS 9900 CPU Key Ring

TMS 9900 CPU Key Ring.