Sinclair QL with Minerva ROM: Faulty Ram Decoder v0.2 *update*

Explanation of how it work the program “RAM3_RAMFAIL_BAS” written by Dominic Brown in the 1990 in Super Basic for the Sinclair QL which is used to calculate what the RAM on the Sinclair QL is broken, you need to use the MINERVA ROM (RAM PassCheck).

I tried to explain how it work and i have rewrote the software in a “language” a bit more modern ;-D

MINERVA OUTPUT EXAMPLE:

——————————————
WRITE: 5 4 8 C 4 8 7 8
READ: 5 C C D 5 C C D
ADDRESS: 0 0 0 3 2 0 0 0
——————————————

HEX WRITE: 54 8C 48 78
HEX READ:  5C CD 5C CD

Convert the numbers in decimal:

DECIMAL WRITE: 84 140 72 120
DECIMAL READ:  92 205 92 205

You have to make a xor in pairs (write & read)

XOR: 84 XOR 92 = 8
XOR: 140 XOR 205 = 65
XOR: 72 XOR 92 = 20
XOR: 120 XOR 205 = 181

Now you need to do an OR with the result of the XOR starting with “0″ and continuing with the result of every OR

OR: 0 OR 8 = 8
OR: 8 OR 65 = 73
OR: 73 OR 20 = 93
OR: 93 OR 181 = 253

Convert the final result of the OR in Binary.

DECIMAL: 253
HEX: FD
BINARY: 11111101

Follow the table to find the faulty ram. Pay attention to the memory address.

1: BAD Ram
0: GOOD Ram

BINARY = 1     1     1     1     1     1     0     1

IF < $30000 (ADDRESS) = IC8  ,IC7  ,IC6  ,IC5  ,IC4  ,IC3  ,IC2  ,IC1

IF > $30000 (ADDRESS) = IC16 ,IC15 ,IC14 ,IC13 ,IC12 ,IC11 ,IC10 ,IC9

IF > $40000 Faulty ram is in expansion memory.

The Original Program (ram3_ramfail.bas) was written for the SINCLAIR QL in SUPER BASIC language by Dominic Brown (1990).
Documentation of how it work by Xad/Nightfall (2015).
Thanks to my friend for the support.

Faulty Ram Decoder Changelog:

  • v0.1: First Release.
  • v0.2: Added a message (Faulty ram is in expansion memory) if the Address > $40000.

Faulty Ram Decoder Online: http://www.nightfallcrew.com/minervaram

Download:

Javatari.js v0.91 (Atari 2600 emulator 100% HTML5/Javascript)

Javatari is now Javatari.js! The emulator has been completely rewritten, and is now 100% in HTML5 and Javascript.

Javatari.js is a multiplayer Atari 2600 emulator written in pure Javascript/HTML5 with no external libs.

Features and Highlights:

  • Javatari is now on HTML5/JS! No more need for the Java Plugin.
  • Runs in any modern Web Browser. Tested in Chrome and Firefox.
  • Real Atari Console user interface.
  • All major ROM formats supported.
  • Save and load Game States easily, or create a Save Game file.
  • Support for Keyboard and Gamepad controllers.
  • Full Screen mode.

New in version 0.91:

  • Keyboard controls now configurable!
  • Starpath/Arcadia ROM format support.
  • Full Screen mode bugfix.
  • Paddle analog control with Gamepad controllers.
  • Audio now mutes when browser tab is not visible.
  • Better auto launch mechanism.

Download: Javatari.js v0.91 (1387)

source: javatari.org

Hewlett-Packard HP-97 (Boxed) – Replacement Drive wheel & Battery

April 26th, 2015 No comments
Hewlett-Packard HP-97

Gallery:

The HP-67 was a magnetic card-programmable handheld calculator, introduced by Hewlett-Packard in 1976 at an MSRP of $450. A desktop version with built-in thermal printer was sold as the HP-97 at a price of $750.

Marketed as improved successors to the HP-65, the HP-67/97 were based on the technology of the “20-series” of calculators (HP-25, HP-19C etc.) introduced a year earlier. The two models are functionally equivalent, and programs on magnetic cards can be interchanged between them.

Features:

The 67/97 provide a complete set of scientific, statistical and engineering operations, including trigonometrical, logarithmic and exponential functions, coordinate conversions, average/deviation etc.

The HP-67/97 series featured a program memory of 224 eight-bit words. The two extra bits per word compared to the HP-65′s six allowed the designers to store any program instruction in a single memory cell (“fully merged keycodes”) even if it required multiple keystrokes to enter (see image). Programs could include 20 labels, subroutines (3 levels deep), four flag registers, 8 comparison functions, and extended index and loop control functions.

At 15 digits, the display was wider than those of the predecessor models, although the decimal point was displayed on its own digit position. The HP-67 keys carry up to four functions each, accessed through “f”, “g” and “h” prefix keys (gold, blue and black labels, respectively). The model 97 had more (and larger) keys, therefore only two functions were assigned to each key. When interchanging magnetic cards between the HP-67 and the HP-97, the calculators’ software took care of converting the key codes, and emulated the 97′s print functions through the 67′s display.

The HP-67 is powered by a pack of three AA-sized nickel-cadmium rechargeable batteries. Owing to the power requirements of the built-in thermal printer, the HP-97 employs a larger battery pack and more powerful charger.

Memory and programming:

Of the 26-register data memory, the first ten (“primary registers”) could be accessed directly, ten more as an alternate register set, and the remaining six had special functions for statistical operations and as an index register. Using the latter, a program could access all 26 registers as a single indexed array. Data memory is not permanent as in later models, i.e. register contents and program are lost when powering off.

The built-in magnetic card reader/writer could be used to save programs and data, with the ability to combine data from multiple cards. The same magnetic card format was later used for the HP-41C which offered compatibility to the 67/97 through software in the card reader. HP offered a library of programs supplied on packs of pre-recorded magnetic cards for many applications including surveying, medicine, as well as civil and electrical engineering.

In addition to software and support from HP, an active user community supported the HP67/97 as well as the other HP programmables of the era. The group was called PPC and produced the PPC Journal. One of the notable contributions of the group was the development of a “Blackbox” that allowed pseudo-alphanumeric displays.

Gallery (Before cleaning):

Gallery (Replacement Drive wheel & Battery):

Gallery (Under the Cover):

Download:

source: wikipedia.com hpmuseum.org

Sharp Pocket Computer PC-1360 (Boxed) + Color Dot Printer CE-140P

April 26th, 2015 No comments
Sharp Pocket Computer PC-1360 (Boxed) + Colour Dot Printer

For this donation i thank: Andrea C. from Trieste.

The Sharp PC-1360 is a small pocket computer manufactured by Sharp. it can also be considered as an electronic calculator.

The PC-1360 was introduced in 1987 and was used by engineers, and favored by programmers for its decent programming and graphical capabilities. It was the top model of the (very small, only two models) 13XX series. It has a LCD display with four lines, also the SC61860 CPU, two RAM extension slot which work with the cynox RAM cards, a 15 pin serial interface and also a powerful BASIC. This is the best models for graphic applications.

Gallery:

source: computinghistory.org.uk

Irradio Videosport TVG-888 & Cartridge SuperSport L8610

April 26th, 2015 No comments
Irradio Videosport TVG-888 & Cartridge SuperSport L8610

For this donation i thank: Paolo Cognetti from Roma.

This is a 3rd generation pong color system. It uses the usual 10 games cartridge: Tennis, Hockey, Squash, Practice, Soccer, Basketball, Basketball Practice, Gridball, Traget 1 & 2.

You can find this system everywhere in Europe though it´s origin once was Hongkong. This is a color variant sold by Irradio in Italy.

Gallery:

source: pong-picture-page.de

(Italian) Jurassic News numero #53

April 20th, 2015 No comments

Sorry, this entry is only available in Italian.

Categories: Magazine, News & Rumors, Today

C64 Game: Commando Arcade SE / Knuckle Busters +29D …

April 9th, 2015 No comments

Some new games or tools (Cracked / Trained or Unrealeased) for Commodore 64 have been released from your favorites groups.

Titles:

  • P0 Snake +4FD 100% [pal/ntsc]
  • Space Ambush +1EJHD
  • Carrera F1
  • On the Farm +34D [crazy hack]
  • Shoot or Die [seuck]
  • Space Trip +24D [crazy hack]
  • Carrera F1 +5H
  • Sex trainer ++ [german]
  • Rabbit Pie HS
  • Commando Arcade SE
  • Bruce Lee II +
  • Ultima IV Remastered
  • Break64 Preview +
  • Break64 Preview [pal/ntsc]
  • Paperboy [cartridge]
  • Trance Sector Ultimate
  • Trance Sector Ultimate +10HD
  • Zyflex Preview +4HF [pal/ntsc]
  • Bimz Preview +2
  • Abyssonaut [seuck]
  • Return of Heracles ++MD+Map
  • Abyssonaut +2D [seuck]
  • Return of Heracles +M V0.9.1
  • Return of Heracles +15
  • Return of Heracles +MD
  • Bruce Lee II v1.9
  • Bruce Lee II v1.9 +
  • Ultima IV Remastered V2.1
  • Knuckle Busters +29D [crazy hack]

Download: All Games in One Archive (756)

source: csdb.dk

Revision 2015 – C64 Party results

April 8th, 2015 No comments

This is the official demo party results from Revision 2015 (Top 3 Entries only). See also the CSDB Revision 2015 section for more informations.

C64 4K Intro:

  • 3 – Aura by Fairlight.
  • 4 – The Empress Awakens by Lft.

Mixed Graphics:

  • 4 – Battle of Ilona by Made.
  • 6 – This world is so fucked, let’s end it tonight by Panda Design.
  • 7 – Dude – Got Your Dosage? by Elko, Tristar & Red Sector Incorporated.

Mixed Music:

  • 4 – Space Cheddar by Genesis Project.
  • 5 – New Sids on the Block by Panda Design.
  • 7 – Loose Teeth – Crisp Bacon by Darklite.

Mixed Demo:

  • 3 – GoatLight by Fairlight, Noice, Offence.
  • 5 – $777 by Razor 1911.
  • 9 – Timeline by Scandinavian Allstars.

Download: Revision 2015 Party stuff (694)

source: 2015.revision-party.net

Cleaning Commodore Amiga 2000 Power Supply

April 6th, 2015 No comments

Photo of cleaning (before and after):

To clean the power supply i have used compressed air and a media bristle brush.

Commodore Amiga 2000 Black Screen Repair

April 6th, 2015 No comments

Click to view original size

I have repaired the Commodore Amiga 2000 with a Black Screen for a dear friend.

Commodore Amiga 2000 Black Screen Repair

Defect:

  • Black Screen.

Diagnosis:

  • The Battery Acid has corroded some pcb tracks (not visible to the naked eye) connected to the pin of the resistor packs RP900.

Repair:

  • I have made three small bridges between the points on the solder side of the pcb and the problem was fixed in a short time.

Sharp Twin Famicom AN-500R Repair

April 6th, 2015 1 comment
Sharp Twin Famicom AN-500R

I have repaired the Sharp Twin Famicom AN-500R for a dear friend.

Sharp Twin Famicom AN-500R Repair.

Defects:

  • Black screen.
  • Distorted sound.

Fix:

  • Cold solder joints.
  • Cleaning the volume slider on the second Joypad.

The microphone is mixed into the output signal, if the contacts of the volume slider are dirty you hear a background noise which disturbs the in game audio.

Gallery:

Commodore CBM Model 3040 Dual Drive Floppy Disk

April 6th, 2015 2 comments
Commodore CBM Model 3040 Dual Drive Floppy Disk

The Commodore 3040 it’s a dual drive 5¼” floppy disk subsystem for Commodore International computers. It uses a wide case form, and uses the IEEE-488 interface common to Commodore PET/CBM computers.

These drive models use a similar single density, single side floppy data storage format to that used by the Commodore 1541 drive, but with a slightly different data marker indicating which model originally formatted the disk. The low-level disk format was similar enough to allow reading between models, but different enough that one series of drive models could not reliably write to disks formatted with one of the other model series.

Gallery before cleaning:

Cleaning cover lock & replaced tantalum capacitors:

Gallery:

Download: CBM 2040-3040-4040-8050 Disk Drive Manual (969)

source: wikipedia

Apple Macintosh Classic

April 6th, 2015 No comments
Apple Macintosh Classic

The Macintosh Classic is a personal computer manufactured by Apple Inc.. Introduced on October 15, 1990, it was the first Apple Macintosh to sell for less than US$1,000. Production of the Classic was prompted by the success of the Macintosh Plus and the Macintosh SE. The system specifications of the Classic were very similar to its predecessors, with the same 9-inch (23 cm) monochrome CRT display, 512×342 pixel resolution, and 4 megabyte (MB) memory limit of the older Macintosh computers.

Apple’s decision to not update the Classic with newer technology such as a 68010 CPU, higher RAM capacity or color display ensured compatibility with the Mac’s by-then healthy software base as well as enabled it to fit the lower price Apple intended for it. Nevertheless, the Classic featured several improvements over the aging Macintosh Plus, which it replaced as Apple’s low-end Mac computer. It was up to 25 percent faster than the Plus and included an Apple SuperDrive 3.5-inch (9 cm) floppy disk drive as standard.

The Classic was an adaptation of Jerry Manock’s and Terry Oyama’s 1984 Macintosh 128K industrial design, as had been the earlier Macintosh SE. Apple released two versions that ranged in price from $1,000 to $1,500. Reviewer reactions were mixed; most focused on the slow processor performance and lack of expansion slots. The consensus was that the Classic was only useful for word processing, spreadsheets and databases. The price and the availability of education software led to the Classic’s popularity in education. It was sold alongside the more powerful Macintosh Classic II in 1991 until its discontinuation the next year.

Gallery:

Macintosh Classic reCap:

source: wikipedia

Gubbdata 2015 – C64 Party results

March 31st, 2015 No comments

This is the official demo party results from Gubbdata 2015 (Top 3 Entries only). See also the CSDB GUBBDATA 2015 section for more informations.

 C64 Demo:

  • 1 – Requiem by Vision.
  • 2 – Stereophonik [2sid] by Mahoney.
  • 3 – The Butterfly Effect by Offence.

C64 Music:

  • 1 – Amen, Bigbeat Brother! by Jammer.
  • 2 – Northern Star by Dane.
  • 3 – Obsession by Flex.

C64 Graphics:

  • 1 – Disconnect by Joe.
  • 2 – Dragonslayer by Mermaid.
  • 3 – Beetlephant by redcrab.

Download: Gubbdata 2015 Party stuff (655)

source: gubbdata.se

CBM prg Studio v3.2.2 released

March 23rd, 2015 No comments

CBM prg Studio Version 3.2.2 is released. There are a lot of new features in this version. I’d really appreciate it if you report any bugs you find or have any suggestions/comments.

CBM prg Studio allows you to type a BASIC or Machine Code program in using a nice Windows environment and convert it to a ‘.prg’ file which you can run on an emulator, or even a real C64 / VIC20 or PET if you’re feeling brave and have the right kit.

CBM prg Studio is the result of merging C64PrgGen and VIC20PrgGen. Adding new features and fixing bugs in two apps which were 95% similar was a bit of a nightmare so merging them made sense.

It was also a good opportunity for a face lift and to add some new features, such as:

  • Programs are project based, meaning all related source files, sprite files etc. are kept in one place and multiple source files can be linked more easily.
  • Tabbed MDI.
  • Syntax highlighting.

What CBM prg Studio isn’t is a front-end for tok64, cbmcnvrt, bastext or any other tokeniser / detokeniser / assembler. It’s all been written completely from scratch.

Improvements:

  • Import binary file as disassembly.
  • Set sprite scratch pad background colour.
  • Keyboard short cuts for collapsing/expanding regions.

Bug Fixed:

  • Assembler:
    • Generate to disk image.
  • Basic:
    • Improved syntax highlighting.
    • Wrong case used when commenting certain lines.
    • Commenting blank lines.
  • General:
    • Menu and/or tool bar was hidden occasionally.
    • Saving to network drives.
    • Source overview settings not retained.
    • Display problems with medium and large fonts.
    • Better file handling with network drives.

Download: CBM prg Studio v3.2.2 (651)

source: ajordison.co.uk