ScuzzBlog: 31st March 2007

Subject 01: C64GS: The Commodore Games System
Subject 02: 1764: What is a REU ?
Subject 03: GVP: Impact Vision 24
Subject 04: SYQUEST : 135Mb EZDrive
Subject 05: A-MAX-II: MAC Emulator for the Amiga
Subject 06: SPECTRUM+2: All Sugar and no tape counter
Subject 07: 14 YEARS LATE: The 1942 Monitor

Entry 0736: Blogs: 7


C64GS: March 2007

Entry 0736: Blog: 1


The Commodore Games System

G4

The C64GS - Games System
Picture from the auction - Better to come

What a mistake to make ... That's how I view this
particular Commodore incarnation. Released in 1990
some eight years after its base technology was 
created to the C64, evidently to compete with the
growing console market. Sadly, loads of Commodore
based games utilised some form of keyboard control
and this machine did not have that facility. Although
numerous games were promised for this machine only a 
small number found their way onto the platform. This
machine was only released in Europe.. By 1990 I guess
the writing was on the wall regarding Commodore and
there failed commercial ventures.

Although I already own a C64GS I don`t have a box. And
therefore I fought hard for this machine, just so I can
view first hand the art work to the box. The machine
came without cartridge, joystick and manual. Fortunately
I already possess these and so I now have a complete
set up. 

Strange beast this one... Not sure.

G4

Picture of my other C64GS


Commodore 1764: March 2007

Entry 0736: Blog: 2


1764 RAM Expansion Module: What is a REU ?
There are odd items that I seem to consistently fail
in obtaining. The FMV unit for the CD32 comes to mind.
Imagine my pleasure at not only winning a 1764 but
also finding out the seller was very local. I was
also pleased cus the guy sold me a Commodore 1942
monitor, which I discuss below. This expansion was
a great move forward for Commodore at the time
giving programmers far more to get their teeth
into. You just have to remember to up the power
on the C64.

At the Winter 1987 CES, Commodore introduced the 
1764 RAM Expansion Module for the Commodore 64. 
The price then was US$129. It provided 256 KB RAM 
for use as a RAM disk.

Although the C=1764 was originally advertised for 
the C64, and the 1700 and 1750 for the C128, any 
of the three RAM expanders will work with either the
C64 or the C128.  Note that if you want to use any 
of them on the C64, you need a heavy duty power supply.  
The 1764 comes with such a power supply.

What is an REU?

An REU is a Ram Expansion Unit that plugs into the 
cartridge port of the Commodore 64 or 128. Commodore 
made three different types of REU's. The 1700, 1764, 
and 1750. For some unknown reason, Commodore stopped 
making these units prematurely. Other companies 
manufactured similar devices, and call them clones. 
The REU most users prefer is the 1750, as it came with 
512K extra RAM, and this can now be upgraded to have 
up to 2 megabytes of RAM. Under normal use, the REU 
is used as an extremely fast disk drive. Programs are 
copied to the REU, and run. These devices are practical 
for using with slow programs such as GEOS, and with 
some word processors, to make dictionary sub-programs 
operate with lightning speed. One of the limitations 
of an REU is that what is stored in it will disappear 
when the computer is turned off. To use a 1750 REU 
with a C64, your C64 needs a heavy duty power supply, 
because the RAM Expansion Unit is powered by the computer.

http://cbm.videocam.net.au/c64info.php

1764 1764

Picture courtesy of the seller and Wikipedia


GVP Frame Grabber: March 2007

Entry 0736: Blog: 3


GVP (Great Valley Products): Impact Vision 24
In addition to obtaining the 1764 I was also offered
the following card from the seller, which I grabbed
literally. I hadn't seen the card before, so again I
was well pleased to have met up to collect the 1764.
I have also been offered another A2000 which sounds
in wonderful condition, so I will be putting all these
bits and pieces into the one machine. Yet another
project starts. Great fun.


[ blurb from the Big Book ]

The ImpactVision 24 is a full length Zorro II framegrabber 
with limited "graphics card" support. Although this card 
is listed as an RTG graphics card, the only support it 
has in this respect is with the ancient EGS system, so 
it is not clear how well the IV24 performs as an RTG card. 
There are two versions of the ImpactVision 24, one which 
is designed for use with the older ECS/OCS video slots, 
whilst the newer version (eg Rev 8) which is designed 
for use with the AGA video slot as found in the A4000 
series machines. The card contains 1.5MB of RAM and is 
capable of capturing at 768x580 in 24bit and supports 
PiP (Picture in Picture). The card includes a standard 
15pin (possibly 9pin?) VGA/SVGA connector which can 
output video at both 31Khz and 15Khz. The card was 
usually supplied with IVPiP, IVCP, IVGrab, IVView, 
IVRead, IVCMD, Scala, Calligari and Macropaint. There 
are at least 5 revisions of this card. Revision 5 cards 
using 3.10 ImpactVision ROMs have been reported not to 
function correctly in an A4000 with Kickstart 3.0. 
several other units were designed for use with this card 
such as the RGB Splitter and Component Transcoder.

GVP

Picture courtesy of the Big Book of Hardware


SYQUEST EZDRIVE: March 2007

Entry 0736: Blog: 4


SYQUEST 135Mb EZDrive

Back in 1995 I recall most PC folk being very excited 
by the Intel processors and the new CDs appearing on 
the machines. For me I was trying to afford the new
ZIP drive for the A1200. The 100MB capacity, after
struggling with DD and HD was just a dream. I kinda
remember these SyQuest drives with the 135MB capacity
though I can`t recall the cost at the time. Took 
me some considerable time to get the ZIP, which I still
have on two Amigas. Great, cus I can use them also
on the PC.

This drive is the third strange drive that I have obtained
this session. Wasn't intentional, but now I can add the 
Syquest to the LS120 and the Floptical Drive that I
received earlier this month. All are compatible with 
the Amiga and will find their way into my tower project.

Specifications
Capacity: 135MB 
Average Seek Time: 13.5ms 
Burst Transfer Rate: 4MB/sec 
Buffer Size: 64K 
Mechanism rated for: 200,000 hours 

Unfortunately, the EZ 135 Drive was not backwards 
compatible with other SyQuest drives, and the original 
capacity was never increased beyond 135MB. The Zip 
drive became very popular, and SyQuest's sales declined.

Interfaces
The EZ 135 Drive was available with several interfaces.

The external drive was available with parallel or SCSI interfaces.

The internal drive was available with IDE or SCSI interfaces.

SyQuest SyQuest SyQuest

Picture courtesy of Wikipedia


MAC EMULATOR FOR THE AMIGA: March 2007

Entry 0736: Blog: 5


A-MAX-II Emulator for the Amiga

The Macintosh emulator for the Amiga

On my MAC theme last blog I had arrive this week a very 
interesting box. Inside is the A-Max-II emulator for 
the Amiga... This is a hardware and software combination 
that allows your Amiga to run most Macintosh productivity 
software. You get this very strange A-Max-II cartridge
with legs. To make it work you need Apple 128K boot ROMs 
these come as a set of two 28 pin chips from an original 
MAC 512kE or a Mac Plus. 

I have what looks like a 30 pin SIMM which I have no idea 
where  this goes.. The ROMs fit inside the cartridge, which 
has legs to stand up at the back of the 2000. The small 
legs are for the A2000, the large legs are for the Amiga 1000. 
The box came with loads of disks including ' An Introduction 
to Apple Macintosh System 7 '

If I pick up the 2000 this week I will try the cartridge 
out then.

The emulator boasts...

Access to partitions on hard drives during Macintosh 
emulation (supports most hard drive controllers)
Access to Macintosh SCSI peripherals such as the 
LaserWriter IICS, hard drives and scanners through 
your Amiga hard drive controller's SCSI port.
Improved handeling of Amiga accelerator boards, for 
maximum speed and compatibility - software runs up to 
five time faster.
Plays Macintosh digitized sounds.
Compatible with all Amiga models.
Supports the use of the Amiga mouse, keyboard, 3.5" 
drives, serial and parallel ports during Mac emulation.
Reads Magic Sac and Spectre disk formats (Atari ST, 
Macintosh Emulators)
Supported video modes include: 640x400 (interlaced), 
640x200 (with scrolling), 512x342 (Mac standards size, 
interlaced) and 1008x800 with the A2024 or Moniterm 
Viking monitor.
Support for PAL screen sizes up to 640x512 (interlaced).
Compatible with Flicker Fixer. 
Uses all available Amiga RAM during Mac emulation 
(some Mac programs may not be compatible with memory 
beyond the first 512k)
Built-in Apple Imagewriter emulation for 9 and 24 pin 
Epson compatible printers.
Transfer software to convert files from AmigaDOS to and 
from A-Max II and Mac disk format)
Built-in recoverable bootable RAM disk.
Runs HyperCard, Multifinder, MacWrite, MacDraw (1 & 2), 
PageMaker (1.2), MacTermial, all system disk versions 
compatible with 128 ROMs and most other productivity 
software. A-Max II may not run all games and Midi software.

A-MAX A-MAX

Picture courtesy of the seller


SPECTRUM +2: March 2007

Entry 0736: Blog: 6


The Spectrum +2: All Sugar and no tape counter.
Along with a number of other interesting goodies this
week, acquired during my collecting, I obtained another
Spectrum+2. The computer is in good working order
and puzzled me somewhat with the greeting message
when switched on..

1982 Amstrad... Strange, cus the Spectrum wasn`t
in the hands of Sugar 1982, if I have my History
correct. With these machines you get an option
screen on reset.. 

Loader
+3 BASIC
Calculator
48 BASIC

1982-1986-1987
Amstrad Plc
Drive M: Available.

Interestingly there were several models of the Spectrum+2.
There was the grey case versions which were pretty well
the same motherboard as the 128. Then there were the 
+2A and +2B black case models which were simply the +3
models but with tape recorders instead of the 3" drive.
The model reference was given due to a change in the
manufacture location from Hong Kong to Taiwan.

Sadly the earlier ROMs developed for the Amstrad did have
compatibility problems with the earlier Spectrum games.

Although Sir Clive Sinclair was a great inventor he was
pretty rubbish at the old marketing of his product. So,
he sold the Spectrum along with the Sinclair name to
Alan Sugar and Amstrad.

Although the +2 boasted a better keyboard and some extra 
ports it did lack the old tape counter ( duh ) which any
computer whizz of Sinclair days would have needed as an
essential. The joystick port was also only comptible with
the Amstrad joysticks.
 
Saying all that the Spectrum +2 was a pretty powerful
computer for its day and did provide the all important
tape deck... even if it didn`t have a volume control
and counter.

Spectrum +2

Picture courtesy of Computer Museum


14 YEARS LATE: March 2007

Entry 0736: Blog: 7


The Commodore 1942 Monitor

[ Collectors retrospective March 29th 2007 ]

Hi

Went to pick up the 1764 RAM expansion for the C64
tonight and finished up fulfilling a wish I had back in
1993.... Back then when I bought my first A1200 I also
paid an advance payement of £50 for a Commodore 1942 monitor.
Sadly Commodore went bust and I never did get my monitor...
Well that was till tonight when for £50, which was the down
payment on the monitor back then, I finally got to buy a 1942
monitor. Felt really really strange plugging her into the
1200, and kinda bought a tear to my eye. This wonderful
1200 has been my bestest of friends since 1993 and still
provides such a magic amount of joy. And tonight she
was united with the Commodore monitor she had been
promised that cold November back in 1993.. Better late
than never I would say.

And if you have never owned and Amiga you really will
never understand the love affair with the computer...
More than a computer... More than a computer...

Happy

scuzz


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Last updated 31st March 2007

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