The Commodore 128, also known as the C128, C-128, C= 128 is the last 8-bit home computer that was commercially released by Commodore Business Machines (CBM). Introduced in January 1985 at the CES in Las Vegas, it appeared three years after its predecessor, the bestselling Commodore 64.

The Commodore 128DCR model features a stamped-steel chassis in place of the plastic version of the C128D (with no carrying handle), a modular switched-mode power supply similar to that of the C128D, retaining that model’s detachable keyboard and internal 1571 floppy drive. A number of components on the mainboard were consolidated to reduce production costs and, as an additional cost-reduction measure, the 40 millimeter cooling fan that was fitted to the D model’s power supply was removed. However, the mounting provisions on the power supply subchassis were retained, as well as the two 12-volt DC connection points on the power supply’s printed circuit board for powering the fan. The C128DCR mounting provision is for a 60mm fan.

A significant improvement introduced with the DCR model was the replacement of the 8563 video display controller (VDC) with the more technically advanced 8568 VDC and equipping it with 64 kilobytes of video RAM—the maximum amount addressable by the device. The four-fold increase in video RAM over that installed in the “flat” C128 made it possible, among other things, to maintain multiple text screens in support of a true windowing system, or generate higher-resolution graphics with a more flexible color palette. Little commercial software took advantage of these possibilities.

The C128DCR is equipped with new ROMs dubbed the “1986 ROMs,” so-named from the copyright date displayed on the power-on banner screen. The new ROMs address a number of bugs that are present in the original ROMs, including an infamous off-by-one error in the keyboard decoding table, in which the ‘Q’ character would remain lower case when CAPS LOCK was active. Some software will only run on the DCR, due to dependencies on the computer’s enhanced hardware features and revised ROMs.

Despite the DCR’s improved RGB video capabilities, Commodore did not enhance BASIC 7.0 with the ability to manipulate RGB graphics. Driving the VDC in graphics mode continues to require the use of calls to screen-editor ROM primitives or their assembly language equivalents or by using third-party BASIC language extensions, such as Free Spirit Software’s “BASIC 8″, which adds high-resolution VDC graphics commands to BASIC 7.0.

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source: wikipedia

The VIC-1010 or VC-1010 is an optional expansion to the VIC-20 manufactured by Commodore. It plugs into the VIC-20′s game/expansion/bus port, providing 6 more such ports along the top.

The rest of the unit sits behind and a bit off to the right of the machine, preventing any obstruction of the VIC’s other ports. Built into the 1010 is a 220v/110v power supply to supplement the computer’s supply.

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This VIC 20 was one of the first model shipped in a rush from Japan to North America in early 1981 before production started in the US. Even the box art was just a quick rework of the Japanese VIC 1001 one.

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source: oldcomputr.com

The Commodore VIC-1001 is the first computer in that series, being released only in Japan October 1980.

The computers that followed it, including the famous VIC-20, arrived in the American and European markets on the heels of its success. Aside from being first, the VIC-1001 also has the unique virtue of a modification from the standard Commodore PETSCII graphics set.

Being Japanese designed and born, this computer includes the Japanese “character” set, called “Katakana”.

The VIC-1001, like all other Commodore 8-bit computers, greets the user with a flashing READY prompt.

The operating system is built into the hardware of the computer, and the user interface is BASIC 2.0, a programming language Commodore purchased from Microsoft in the late 1970s.

The VIC featured 5 kilobytes of memory, and color graphics at a time when that was very uncommon, though it’s display is only capable of 22 characters per line.

The joystick port and game cartridge port are prominent features, as Commodore meant to market the VIC as a game console/computer hybrid. The cartridge port could also be used to expand the VIC-1001 memory.

Software on Cartridge:

• Programmers; Aid PacK (VIC-1212) [BOXED]
• Machine Language Monitor (VIC-1213)
• Rally-X (VIC-1903) Red Label [BOXED]
• Night Drive (VIC 1909) Red Label [BOXED]
• Omega Race (VIC-1924) [BOXED]

Memory Expansion Cartridges:

• 3K Ram Pack (VIC-1210) [BOXED]
• Super Expander + 3k RAM (VIC-1211M) [BOXED]
• 8k Ram Pack (VIC-1110) [BOXED]
• 16k Ram Pack (VIC-1111) [BOXED]

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Download: Japanese Kernal and Characters (876)

source: zimmer.net

Why make a Retr0Bright if you have a 130XE (mint) to sacrifice to replace the yellowed case and keyboard of an Atari 800XE ?

If we talk about collecting an atari 800XE is more important than a 130XE, especially if you have more than one.

I have replaced only the upper side of the case, the keyboard and the plastic piece of the led which in the 800XE is white and not red, the back side with the adhesive fortunately was in perfect condition.

I didn’t have to do any repairs except to calibrate the XC12 cassette recorder motor speed using an old but still valid speed calibration system, a music cassette, obviously only if you have a “good ear” and you know the music track perfectly.

NOTES: i have never seen the XC12 in a white box and miss it in my Atari collection.

NOTES 2: How did i listen the Billy Idol cassette? the Atari SIO connector supports Analog audio with a dedicated pin to this purpose.

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This is the same article of the previous one “Floppy Disk Cleaner” with the only difference that i have used a ALPS mechanics.

I have also connected the RED Led throught a 680 ohm 1W resistor to the 12v line.

Previous post:

Why throwing away a Commodore Floppy Disk Drive with a broken head it could become a great gadget to clean Floppy Disks.

How to do ? just disassemble the entire part that controls the movement of the head including the head itself.

The power supply used is 12v with at least 1A, you must connect the positive to the BROWN wire and the negative to the BLACK wire of the motor control PCB.

Good Cleaning.

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This computer has kept for many years my BBS “Hidden Power / Nightfall HQ” up until closing, previously the BBS ran on the Amiga 1000 … then A500 and A2000.

I also publish two historical photos of my “BBS Room” where you can see this Amiga 3000 running.

I give a brief description of what was done and what i did today for this computer.

• Year 2001 i have removed the battery and one of the two SCSI Harddisks that was dead.
• Year 2010 i have cleaned the external/internal case and published the photos on the blog.
• Year 2018 i have cleaned the keyboard.
• Year 2019 i have carefully cleaned the motherboard that was covered with a sticky layer of Nicotine (in the BBS Room peoples likes to smoke a lot)
  • Cleaned the Floppy Drive covered inside and outside by a sticky layer of Nicotine, to repair it i had to completely disassemble it.
  • Replaced the Kickstart ROM 2.04 with version 3.1
  • Removed the last died SCSI Harddisk.
  • Installed “new” 250Mb Quantum Maverick SCSI Harddisk.
  • Installed WB 3.1 and MagicWB + a couple of Demos and of course Pinball Dreams Harddisk version.
  • Replaced the WD33C93A SCSI controller chip with AM33C93A-16PC.
  • Cleaned the Keyboard pcb and replacements of the rubber pad, more than 20 keys are died.
  • Removed the Zorro BSC / Alfa Data MultiFace Card 3 (multi Serial) card and installed the Village Tronic Ariadne II (Ethernet Card)

Everything works perfectly as you can see from the photos.

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