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Retrocomputing and repairs, C64 and others

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Category: Retrocomputers repair

My Amstrad CPC 464, first tests and some pictures. PSU and a simple monochrome video cable.

My Amstrad CPC 464, first tests and some pictures. PSU and a simple monochrome video cable.

Retrocomputers repair July 29, 2017
I have recently bought this nice Amstrad CPC 464 computer. So, I was able to update my article on 8... Read more »
Commodore 1541 disk drive maintenance, part 2: head alignment

Commodore 1541 disk drive maintenance, part 2: head alignment

Retrocomputers repair July 27, 2017
Commodore 1541 alignment issues are less common than what you may think. Before going into the alignment process, some simpler... Read more »
A 64K Commodore 16: how to expand its RAM memory

A 64K Commodore 16: how to expand its RAM memory

Retrocomputers repair June 22, 2017
In 1984, Commodore introduced the Commodore 16 computer. A 16 K RAM computer may seem strange in 1984, but, it... Read more »
Building a Commodore 64 testboard, chips desoldering tips

Building a Commodore 64 testboard, chips desoldering tips

Retrocomputers repair May 28, 2017
When repairing a Commodore 64 home computer, there is a tool that is very helpful: another working Commodore 64, but... Read more »
Commodore 64 fix: blank screen, bad cassette switch sense

Commodore 64 fix: blank screen, bad cassette switch sense

Retrocomputers repair May 18, 2017
Today I fixed a 250407 board Commodore 64 with multiple issues. At the beginning, the good old blank screen was... Read more »
Commodore 1541 disk drive maintenance, part 1

Commodore 1541 disk drive maintenance, part 1

Retrocomputers repair March 24, 2017
Despite the design flaws it was plagued with, the Commodore 1541 has always been regarded as the standard device for disk... Read more »
Commodore 64 C repair: intermittant operation due to bad contacts on sockets

Commodore 64 C repair: intermittant operation due to bad contacts on sockets

Retrocomputers repair March 24, 2017
Commodore 64 C repair case: intermittant operation due to bad socket connections. Sometimes sockets must be... Read more »
Commodore 64 C RAM strange issue

Commodore 64 C RAM strange issue

Retrocomputers repair November 1, 2016
Some days ago I’ve found a Commodore 64 C I didn’t even remember I had. After some cleaning, I did... Read more »
Commodore 64 fix: RESTORE key and power switch

Commodore 64 fix: RESTORE key and power switch

Retrocomputers repair October 20, 2016
RUN/STOP+RESTORE is a useful key combination that allows you to escape from BASIC programs and some ML programs. For instance,... Read more »
THT IC sockets: a comparison between them and how to use

THT IC sockets: a comparison between them and how to use

Electronics October 9, 2016
IC sockets make it possible to replace a chip with ease. No need to desolder the chip, you can just lift... Read more »
Atari 2600 and 7800: repair tales

Atari 2600 and 7800: repair tales

Retrocomputers repair October 2, 2016
Vintage Atari consoles are still really fun to use. Atari VCS / 2600 systems are known to be very reliable.... Read more »
Commodore 64: how to repair it, step by step

Commodore 64: how to repair it, step by step

Retrocomputers repair May 29, 2016
This is not going to be a comprehensive guide on Commodore 64 repair. Still, this article will focus on the... Read more »

Il Commodore 1541, consigli d’uso e manutenzione (parte 2)

Articoli in italiano October 24, 2015
La procedura di allineamento del Commodore 1541 non è particolarmente complicata ma richiede molta pazienza, specialmente se la si vuole... Read more »

Dissaldare un integrato THT in maniera sicura

Articoli in italiano October 16, 2015
Nei retrocomputer (Commodore ma non solo) è impiegata prevalentemente la tecnologia THT (Through Hole Technology). La piastra presenta dei fori... Read more »
Commodore 64 con RAM guasta

Commodore 64 con RAM guasta

Articoli in italiano October 14, 2015
  Ho comprato un Commodore 64 da riparare e appena acceso mi sono ritrovato con questa schermata. Il messaggio di... Read more »

Il Commodore 1541, consigli d’uso e manutenzione (parte 1)

Articoli in italiano October 12, 2015
Pur con i suoi limiti e difetti, il Commodore 1541 si impose subito come lo standard per il Commodore 64... Read more »

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Commodore 64 SID music programming with BASIC - playing a note

Although machine language is what we really need for C64 music programming, BASIC may be more than a ...

VIC-II graphics, accessing ROM font images from different banks (C64)

The Commodore 64 has 64K of RAM memory and the VIC-II graphic chip can access all of it, but in bloc ...

Garbage collection on Commodore 64 BASIC, how to handle it

One important part of a BASIC interpreter is string handling. This can be done in two ways: either ...


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