Autopsy:

1234►

from Old-Computers.com:

The sharp MZ 800 was the successor of the MZ 780. It was partially compatible with the MZ 700 series and the old MZ 80K series as well.

It was sold under three reference numbers:

• MZ-811 without tape drive.
• MZ-821 with built-in 1200-baud tape drive.
• MZ-831 with tape drive and built-in 4-colour printer-plotter.

The Tape drive could be substituted for a Quick-disk drive unit. The Quick-Disc was a small 2.8-inch disk with sequential access.

Like the MZ 700, there was no language in ROM, it had to be loaded from tape, quick disk or floppy disk. The ROM only contained boot code, OS calls and special code to allow the user to use the 64 KB RAM as a virtual disk.

A single or double 5.25″ disk drive could be connected to the MZ 800. It then worked under a special version of CP/M called P-CP/M. Some great products like Wordstar, dBase II and Multiplan were adapted to it. Under CP/M, it was possible to read multiple disk formats from the 360 KB (Sharp format) to the 720 KB (CP/M IBM PC format).

The MZ 800 was sold in Japan under the name SHARP MZ 1500. The MZ 1500 had the same characteristics except its black case, a built-in Quick-Disc drive and a slighty different graphic video management.

source: old-computers.com

This is the official demo party results from X-2012 (Top 3 Entries only). See also the CSDB X2012 section for more informations and downloads.

C64 Demo Competition:

• Coma Light 13 by Oxyron
• Artphosis by Hitmen
• Trick and Treat by Fairlight, Offence, Prosonix

C64 Graphics Competition:

• Cozy Home by Sphinx
• MC God by Archmage
• Koalaman by Pal

C64 Music Competition:

• X2012 by Sad
• The Empire of Norway by Ole Marius Pettersen
• Spasmolytic by Magnar Harestad

Download:

• X-2012 Full Party Stuff (1013)
• X-2012 Results (862)

source: noname.c64.org

The C64-Archiv is an easy to use file manager for C64-files.

C64-Archiv descriptions:

• Scans and stores your C64 – (games) – collection with only a few clicks.
• Easily manages your C64-programs by creating your own categories and selections.
• Starts the C64-programs in different emulators.
• Delivers instructions for the emulators VICE, CCS64, HOXS64 and EMU64.
• Works with tools e.g. 64Copy, D64Lister or DirMaster.
• Stores the C64-programs from files with the extensions: .D64, .D71, .P00, .PRG e. .T64.
• Stores files by name with the extensions: .TAP, .VSF (VICE-snapshot-file) and .C64 (CCS64-session-file).
• Stores text and information files with the extensions: .TXT, .NFO and .DIZ
• Stores PDF files.
• Searches archiv files with the extensions: .ZIP, .7Z and .CAB
• GameBase frontend with the possibility to download games.
• GameBase view with up to 30 columns.
• Supports multi-language (currently: Englisch, French, Italian, Spanish and German)

Version v3.4 – What’s new?

• NEW: Profiles for Mirco64.
• NEW: New view “Main files”
• NEW: Store directories into a text file.
• NEW: MD5 hash.
• NEW: Preview (Directory, pictures, text files)
• NEW: Spanish translation (Thanks to Juan from Lemon64 forum)
• NEW: Improved views “Last started” and “Top 100″
• NEW: Number of downloads of gamebase files are no longer limited.
• FIXED: Criteria for file endings worked incorrect.
• FIXED: Crash during import

Download: C64-Archiv v3.4 (1309)

source: Mikes Pages

A new version of the firmware for the interface 1541 Ultimate II is released. This version runs only on the 1541 Ultimate II cartridge (new fpga).

New features:

The ‘Ultimate Audio’ feature is a new feature for the 1541 Ultimate-II module. It implements multi- channel audio sample playback support from REU memory, and is an exciting addition to the possibilities this cartridge offers.

Download:

• 1541 Ultimate II Firmware v2.5x (1437)
• Ultimate Audio API Manual v0.2 (1760)

source: 1541ultimate.net

Some new games (Cracked / Trained or Unrealeased) for Commodore 64 have been released from your favorites groups: Hokuto Force, Dinasours, Antarctica, TRIAD, Laxity and Really Proud Lamers.

Download:

• School Bus Driver +2 [one-filed] (925)
• School Bus Driver (932)
• Grand Prix (Tronic Verlag) (936)
• Android 2 +4PD (904)
• Pedro +4PD (907)
• Firehouse Rescue +3FD [ntsc/pal] (966)
• Little People Bowling Alley &D [ntsc/pal] (947)
• Heavy Metal Deluxe Gold +4HF 101% [pal/ntsc] (976)
• All Games in One Archive (2302)

source: csdb.dk

Ikari want to make a bit of clarity of the future of the SD2Snes interface.

Directly from the SD2Snes Homepage:

Progress update & (rough) road map:

In the past weeks, amongst a number of smaller feature requests, I’ve been getting a lot of questions about SuperFX progress. I’ve even seen rumors spread about SuperFX support being cancelled. This is not the case.

SuperFX is the most complex core to implement to date, and it even took me several months to complete Cx4 support. That was before the public release of sd2snes, however, so less people noticed. Rest assured that SuperFX support is still in progress. It will take at least the rest of this year though.

To me, having existing features working properly takes priority. That’s why I’m addressing reported bugs and also minor feature requests which have been in the queue for quite long in parallel to working on SuperFX. I expect there to be 1-2 more releases before SuperFX support is introduced in v0.2.0, not counting critical bug fixes should need for them arise. Since people seem to get annoyed at my love for the Satellaview I’ll put off further work on that until after SuperFX.

There will be a v0.1.5 release shortly, which supports large SRAM properly, fixes sorting of long directory entries, fixes a glitch in SPC playback with S-APU consoles, works properly with non-standard controllers plugged in (e.g. Super Scope), and has more faithful BS-X memory mapping (<- actually finished a couple of weeks ago).

v0.1.6 will probably introduce proper SuperCIC support (allowing to select 50/60Hz from the menu) and maybe rudimentary cheat code support (ROM patching only). Both might be delayed to v0.2.0.

Keep in mind that while I’m continuing work on SuperFX support it helps do something else now and then.

source: sd2snes.de

Some new games (Cracked / Trained or Unrealeased) for Commodore 64 have been released from your favorites groups: Atlantis, Laxity and Really Proud Lamers.

Download:

• MEM64! +FD 101% [pal/ntsc] (1105)
• MEM64! (1000)
• Diagonal Ball +2 (997)
• Coins + H (1002)
• All Games in One Archive (2412)

source: csdb.dk

This is a new promotional spot released a few hours ago for the interface C64SD Infinity v2.0 Blue version by Manosoft

Watch the Promotional Spot:

source: manosoft.it

Commodore Free Magazine Issue #64

Free to download Commodore magazine dedicated to Commodore Computers.

Download:

• Commodore Free Magazine Issue #64 (D64) (1056)
• Commodore Free Magazine Issue #64 (PDF) (1160)
• Commodore Free Magazine Issue #64 (TXT) (1395)

source: commodorefree.com

Forth, the Language.

Forth is a different language. It’s aged and a little weird.
What’s cool about it? It’s a very low-level and minimal language without any automatic memory management. At the same time, it easily scales to become a very high-level and domain-specific language, much like Lisp. Compared to C64 Basic, Forth is more attractive in almost every way.

It is a lot more fast, memory effective and powerful. Compared to C, specifically cc65, the story is a little different. It’s hard to make a fair comparison. Theoretically Forth code can be very memory efficient, and it’s possible to make Forth code that is leaner than C code. But it is also true that cc65 code is generally much faster than Forth code.

Download: durexForth v1.21 (982)

source: noname.c64.org

Present a pet 2001/3032 intro called: it could be better.

Many years have passed since our last release. It’s time to release a demo for the Commodore PET 2001/3032.

Stay tuned, the next demo might be for the Commodore 64 or for other retro computers.

Creditz for this intro go to:

• Code by xAD/Nightfall
• Big logo by Lynx/Nightfall
• Big logo petscii conversion by mike (bitfixer.com)

Video demostration on real hardware:

The archive contains the. PRG and the .TAP and a description in “FILE_ID.DIZ” format.

Download: It could be better by Nightfall (1518)

Autopsy:

1234►

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

This is a little description of the repair of a Radio Shack TRS-80 Model 1 for a Friend.

The computer comes with several problems.

• Some IC are dead or in shorted state.
• Keyboard flat cable.
• One key “L” is dead.

Finding the cause of the fault has not been easy, i had to ask for a help to Ian, this dude is an expert of TRS-80 repairs.

How you can see from the photos, i had to replace a number of IC.

• 4 x Video RAM 2102 (Z62 / Z63 / Z46 / Z48)
• 1 x Z80 (Z40)
• 1 X 74LS157 (Z31)
• 1 X 74LS93 (Z32)

Stage of the defect (before and after):

Keyboard repair (replacement of internal contacts):

Micro Computer Technical Reference Handbook:

Download: TRS-80 Micro Computer Technical Reference Handbook (2482)

Autopsy:

123►

from Wikipedia:

TRS-80 was Tandy Corporation’s desktop microcomputer model line, sold through Tandy’s Radio Shack stores in the late 1970s and early 1980s, and one of the earliest mass-produced personal computers. The first units, ordered unseen, were delivered in November 1977, and rolled out to the stores the third week of December.

The line won popularity with hobbyists, home users, and small-businesses. Tandy Corporation’s leading position in what Byte Magazine called the “1977 Trinity” (Apple, Commodore and Tandy) had much to do with Tandy’s retailing the computer through more than 3,000 of its Radio Shack storefronts. Notable features of the original TRS-80 included its full-stroke QWERTY keyboard, small size, its floating point BASIC programming language, an included monitor, and a starting price of $600.

The pre-release price was $500 and a $50 deposit was required, with a money back guarantee at time of delivery. One major drawback of the original system was the massive RF interference it caused in surrounding electronics. Stricter FCC regulations on interference led to the Model I’s replacement by the Model III.

Radio Shack announced the TRS-80 (Tandy Radio Shack) at a New York City press conference on August 3, 1977. It cost $399, or $599 with a 12″ monitor and a Radio Shack tape recorder as datacassette storage. Before this, the most expensive product Radio Shack sold was a $500 stereo.

The company hoped that the new computer would help Radio Shack move into higher-priced products, and improve its “schlocky” image among customers. Small businesses were the primary target market, followed by education, then consumers and hobbyists. Despite its hobbyist customer base, Radio Shack saw hobbyists as “not the mainstream of the business”. Although the press conference did not receive much media attention due to a terrorist bombing elsewhere in the city that day, “six sacks of mail” arrived at company headquarters asking about the computer, and over 15,000 people called Tandy to purchase a TRS-80, paralyzing its switchboard.

Unlike competitor Commodore—which had announced its PET several months earlier but had not yet shipped any—Radio Shack began shipping computers by September. Still forecasting 3,000 sales a year, the company sold over 10,000 TRS-80s Model Is in its first one and a half months of sales, and over 200,000 during the product’s lifetime.

source: wikipedia

Turbo Chameleon 64 is an extremely user-friendly cartridge that can be used without opening the computer. It is just plugged to the expansion port of the C64.

The Turbo Chameleon 64 cartridge can also be operated as a stand-alone unit (since it’s basically an FPGA computer like the C-One or the Minimig in a C64 cartridge case), replacing the computer, the floppy drive and the heavy power supply.

When used as a stand-alone unit, a USB power adapter or active USB hub can be used as a power source.

Changelog:

• New VGA controller with new modes and VIC-II sync.
• Tripple buffering mode added for properly displaying IFLI pictures.
• Scale-2x video scaling algorithm added.
• Scanline emulation added.
• In cartridge mode real CIAs registers and interrupts are used (allows use of a modem).
• In cartridge mode real VIC-II registers and interrupts are used (allows use of a lightpen).
• Fixed I/O assignments for FPGA (lower power use).
• Lowlevel SD-card functions now use multiple block reads if possible, which increases linear reading speed by about 40 to 50% (most noticeable on large files, such as REU images)
• BUGFIX: fixed error handling and timeouts of the IEC routines, which makes all related operations more robust.
• BUGFIX: added missing timeouts to SD-card functions.
• Joystick port 1 now also works for navigating the menus.
• BUGFIX: on some C64s pressing shift would result in phantom keypresses (F1/F2) under some conditions.
• NEW: various new VGA modes and other options for the new VGA controller (see manual)
• Improved loading speed of file inside T64 images.
• Improved keyboard handling to make the browser a bit snappier.
• BUGFIX: the size of the character ROM saved by the ROM saver was incorrect.
• BUGFIX: .wav player stops at the end of the file and does not continue playing garbage.
• BUGFIX: files bigger than 2k are displayed correctly by the .txt viewer.
• BUGFIX: when copying files out of a t64 image the resulting file was missing the last two bytes and/or the last block was missing completely.
• BUGFIX: filecopy from/to a IEC device did incorrectly abort after 1 block.
• BUGFIX: filecopy filename character set conversion was broken.
• BUGFIX: AR/RR ROM was not correctly disabled when autostarting programs from the filebrowser with AR/RR enabled as default cartridge.
• NEW: added DOS wedge command (see manual)
• NEW: added load and save commands (see manual)

Download: Chameleon 64 beta firmware 8b (1608)

source: beta.icomp.de