Gallery:

This is a full replacement of the power supply of the Amiga 500 with a similar one of the last generation. This type of switching power supply fits perfectly inside the case of the original psu.

The repair will not be made because this psu is very common at very low prices, i don’t waste even a second to find the multiple faults, i prefer devote to other things less common.

Commodore Amiga 500+ #1

Defect:

• Battery Leaks.

Solution:

• Battery Removed.
• Cleaned the PCB with PCC Kontakt.

Commodore Amiga 500+ #2

Defect:

• Battery Leaks.

Solution:

• Battery Removed.
• Cleaned the PCB with PCC Kontakt.

Commodore Amiga 600

Defect:

• Where are the capacitors and the tracks ?

Solution:

• Cleaned the PCB with PCC Kontakt.
• Alternative way to install the capacitors ;-D

Commodore A500 Keyboard: Keep the useful things from the useless things.

Commodore Amiga 500 Keyboards Join & Fix.

Unfortunately from five keyboards i have made only one in a good shape and full working.

Commodore Amiga 500/600 PSU Repair

Amiga 500/600 (PSU) PowerSupply #1

Defect:

• Short-circuit and the fuse blows.

Replace parts:

• 1 x Transistor NPN 2SC3679.

Amiga 500/600 (PSU) PowerSupply #2

Defect:

• Short-circuit and the fuse blows.

Replace parts:

• 1 x Transistor NPN BU508A.

Amiga 500/600 (PSU) PowerSupply #3

Defect:

• Short-circuit and the fuse blows.
• The PCB is half broken.
• Some components have suffered of too much heat.
• The locking pins of the cover are broken.
• Dirty and Yellowed.

I don’t made the repair. I recovered what might come in handy.

Someone has to repair these computers! ;-D

In the photo you can see: Commodore 64(C) motherboard, Commodore Amiga 500 motherboard, Commodore Amiga 600, Sinclair QL, Commodore 128 motherboard and some Amiga keyboard.

I thank Fabio Bovelacci (Frater Sinister) for the donation.

Donated item:

• Commodore Amiga 500 with PSU, Mouse, Manual.
• GVP HC+8 Series II for Amiga 2000/3000/4000.
• Compatible 512k Memory Expansion for Commodore Amiga 500
• Psion Organiser II with Serial Cable.
• Sharp – EL-6200 Organiser
• Motorola FPU 68882RC50 50MHZ

I thank a friend for the donation.

Donated items:

• Hardital (Italy) Bang 2082.
  • This is a Accelerator expansion for Amiga 500/2000 with a 68020 @ 14.3 MHz (synchronous) and a optional FPU up to 68882 @ 25 MHz (asynchronous).

• Logica (Italy) Kick Mouse.
  • Kickstart Switcher 2.0

Material donated:

• Commodore Monitor 1085S (The 1085(S) is a cost-reduced version of the 1084, with lower resolution (.52 mm dot pitch) and no non-glare screen treatment.)
• Commodore Amiga 500 + 512k Expansion.

Autopsy:

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from MyOldComputers.com:

The year was 1978. Atari was at the top of the video gamming world with its 2600 VCS game console. Atari management looked around and saw a new and potentially lucrative market just beginning to take shape. This market was the Home Computer Market. They saw a market with relatively few major competitors and Atari was in a great position to market a computer of their own. They, after all, were a trusted household name, everyone owned an Atari or knew someone who did!

So December of 1978 Atari introduced the 400 and 800 series computers. The actual computers were not delivered until late 1979 due to production problems. The 400 was a scaled down version of the Atari 800. Introduced as an entry level computer based on the same MOSTEK 6502A processor running at 1.70 MHz with 16K of user RAM built in. It had a membrane style keyboard (not very touch type friendly) with 62 touch sensitive keys and 4 special keys to the right of the keyboard.

It stood out amongst the other computer offerings of the day with its graphics and sound capabilities. It was capable of producing 128 colors on the screen using the CTIA video processor and up to 256 colors with the upgraded GTIA video processor chip used on later versions of the computer. The 400 was first amongst the early computers to be able to display 4 programmable screen objects simultaneously called ‘Player-missiles’ (also known as ‘Sprites’ on Commodore computers). This was at a time when the most computers produced only monochrome displays or very primitive 8 color screens. The graphics were handled by a custom chip called the “ANTIC” (CTIA/GTIA). This chip was designed to work as a sort of co-processor to take the work load away from the main processor to display graphics and color on the screen.

The team that developed the custom chips inside the 400 and 800 was headed by Jay Miner who later, after leaving Atari, headed the teams who developed the custom chips that surrounded the Motorola MC68000 processor that powered arguably the most advanced computer of its time, The Amiga 1000!

source: myoldcomputers.com

Autopsy:

Cabletronic ESP 329 is a 2 MB Fast RAM expansion for Amiga 500/1000 (no passthrough port).

source: amiga.resource.cx

Autopsy:

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from Wikipedia:

The CDTV (an acronym for “Commodore Dynamic Total Vision”, a backronym of an acronym for “Compact Disk Television”, giving it a double meaning) was a multimedia platform developed by Commodore International and launched in 1991. On a technological level it was essentially a Commodore Amiga 500 home computer in a Hi-Fi style case with a single-speed CD-ROM drive. Commodore marketed the machine as an all-in-one home multimedia appliance rather than a computer. As such, it targeted the same market as the Philips CD-i. Unfortunately for both Commodore and Philips, the expected market for multimedia appliances did not materialise, and neither machine met with any real commercial success. Though the CDTV was based entirely on Amiga hardware it was marketed strictly as a CDTV, with the Amiga name omitted from product branding.

The CDTV debuted in North America in March 1991 (CES, Las Vegas) and in the UK (World of Commodore 1991 at Earls Court, London). It was advertised at £499 for the CDTV unit, remote control and two titles. Commodore chose Amiga enthusiast magazines as its chief advertising channel, but the Amiga community on the whole avoided the CDTV in the expectation of an add-on CD-ROM drive for the Amiga, which eventually came in the form of the A570. This further hurt sales of the CDTV, as both it and an A570-equipped A500 were the same electronically, and could both run CDTV software, so there was very little motivation to buy it. Commodore would rectify this with CDTV’s successor, the A1200-based Amiga CD32, by adding the Akiko chip. This would enable CD32 games to be playable only on the CD32.

The CDTV was supplied with AmigaOS 1.3, rather than the more advanced and user-friendly 2.0 release that was launched at around the same time. Notably, the CDXL motion video format was primarily developed for the CDTV making it one of the earliest consumer systems to allow video playback from CD-ROM.

Though Commodore later developed an improved and cost-reduced CDTV-II it was never released. Commodore eventually discontinued the CDTV in 1993 with the launch of the Amiga CD32, which used which again was substantially based on Amiga hardware (in this case the newer Amiga 1200) but explicitly targeted the games market.

source: wikipedia

The HxC Floppy Drive Emulator is a software and hardware system created by jfdn aka Jeff.

The aim of this project is to replace the floppy disk drive by an electronic device emulating the floppy disk drive (list of supported Computer/Hardware).

There are two differents emulators:

• A USB version which allows to connect the floppy disk drive interface of the computer to a PC via a USB cable.
• A SDCARD version which allows to emulate floppy disks which images are stored in a SDCARD.

Firmware SD HxCFloppyEmulator v1.7.1.2:

• Drive A <> Drive B constant polling issue corrected (Atari ST).
• Better SD Card error handling.

Firmware SD HxCFloppyEmulator v1.7.1.1:

• New embedded setting menu : To access this menu remove the SDCard and press the select button.
  • By this menu you can:
  • Change the floppy Interface mode.
  • Change the bitrate.
  • Change the track step mode.
  • Enable/disable the drive B.
  • Enable/disable the step sound.
  • Set the user interface sound volume.
  • Set the backlight timing.
  • Set the standby timing.
  • Check the software and bootloader version (integrity test included).
  • Clear/reset the settings and reset the Emulator.
  • Exit this menu…

• SD Card: Issue with some sd card corrected : Incompatibility with some SD chipset corrected.
• Write support: Timing for MFM / FM 250/300/500KBits/s write support readjusted. DataMark supported : 0xFB,0xF8 (deleted data mark), 0xFA,0xF9. HFE file format enhanced : Track 0 Side 0 & Track 0 Side 1 track write mode can be different from the others tracks.
• New track seek algorithm: Faster track seek/settle time -> Faster Loading time !
• Flip disk function: the disk image can now be flipped (reverse side 0side 1).
• Bad track number at power up corrected (E-mu Emulator I/II, SP1200, Linn/Forat 9000…)
• Experimental “Rev2″ HFE support : Correct some issue with some Amiga games/demos.
• Lots of internals code optimization…

 Download:

• HxC Floppy Emulator Firmware v1.7.1.2 (1132)
• HxC Floppy Emulator Manager (1015)

source: hxc2001.free.fr

Autopsy:

The Commodore Amiga  520  Video  Adapter  is a device that allows you to connect your  Amiga  500  to  a  TV  set  or a composite video monitor.

It does this by converting  the  RGB  video signal the Amiga produces for RGB monitors to a composite video signal that a TV  or composite monitor can interpret.

Autopsy:

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from Wikipedia:

The Amiga 500 – also known as the A500 (or its code name ‘Rock Lobster’) – was the first “low-end” Commodore Amiga 16/32-bit multimedia home/personal computer. It was announced at the winter Consumer Electronics Show in January 1987 – at the same time as the high-end Amiga 2000 – and competed directly against the Atari 520ST. Before Amiga 500 was shipped, Commodore suggested that the list price of the Amiga 500 was 595.95 USD without a monitor. At delivery in 1987, Commodore announced that the Amiga 500 would carry a 699 USD list price.

The Amiga 500 represented a return to Commodore’s roots by being sold in the same mass retail outlets as the Commodore 64 – to which it was a spiritual successor – as opposed to the computer-store-only Amiga 1000.

The original Amiga 500 proved to be Commodore’s best-selling Amiga model, enjoying particular success in Europe. Although popular with hobbyists, arguably its most widespread use was as a gaming machine, where its advanced graphics and sound for the time were of significant benefit.

The Amiga 500 series was discontinued in mid-1992 replaced by the similarly specified and priced Amiga 600, although this new machine had originally been intended as a much cheaper budget model, which would have been the A300. In late 1992, Commodore released the “next-generation” Amiga 1200, a machine closer in concept to the original Amiga 500, but featuring significant technical improvements. Despite this, neither the A1200 nor the A600 replicated the commercial success of its predecessor as, by this time, the market was definitively shifting from the home computer platforms of the past to commodity Wintel PCs and the new “low-cost” Macintosh Classic, LC and IIsi models.

source: wikipedia