Repair Commodore Amiga 3000 Motherboard with Battery leakage
There was once a motherboard of an Amiga 3000/25 devastated of the Battery acid where missings all the socketed components and others are unsoldered and recovered for other things.
The situation was not exactly the best one, in other words … was going into the box of spare parts.
I made the impossible, i have cleaned, scraped and rebuilt many tracks of the pcb corroded by the battery acid and i must say that with lot of patience i have repaired the motherboard giving a new life to this Amiga 3000/25 that he had no many chance to come back to work
Ikari has released a new firmware for the SD2Snes Flash Cartridge (Super Nintendo/Famicom). The upgrade instructions can be found here.
Full Changelog:
- In-game button combinations are in effect. See the table below for the key mapping. Note that some games show glitches with the in-game functions in place. I added an additional feature to temporarily disable them in case of game glitches (e.g. Secret of Mana hangs at the Squaresoft logo, displaying only garbage). I’m not entirely happy with the button choice but it will do for now. ;)
- LED blink codes for file system errors – e.g. in case the SRM file cannot be saved this will tell you that something’s gone wrong. The blink codes are yet to be listed.
- Also the sd2snes will retry saving until it works so you have the chance to swap out the SD Card. In that case the directory structure must be present where the sd2snes expects to save the file.
- “Screen saver” – in the menu, the screen is darkened after some idle time to reduce wear on CRT and plasma screens.
- Memory sharing between SNES and the sd2snes CPU is greatly simplified (The FSM is reduced to only 5 states instead of 18) and timing is more relaxed. This should help with stability on a wider range of consoles.
- On-the-fly file browsing. Also shows a little “loading…” window when loading directories/files.
- Windows are now blue so they stick out better in front of yellow directory listings.
- Cx4 data ROM is now embedded in the FPGA configuration – no more need for the external file cx4.bin.
- Initial Satellaview clock is back to 18:00:00 from 18:05:30.
- SD cards can be hotswapped. Currently there is no automatic refresh of the file list so tapping reset on the SNES or changing the directory is necessary to get the new contents.
- The status line is moved upward a few pixels so hopefully it doesn’t get eaten by overscan.
- Navigation: When scrolling page-wise with the right D-pad arrow, the end of the file list is now aligned to the bottom of the screen.
- Navigation: The shoulder buttons can be used to jump to the beginning/end of a directory listing.
- Bugfix: some compatibility issues with a number of games. (Super Play Action Football (S-RTC interference), GP1 Part II (WRAM initialization), Human Grand Prix (mapper detection bug))
- Bugfix: properly initialize FPGA state machine (on some consoles the menu failed to start at all)
- v0.1.7 final will contain menu items for various configuration settings and a cheat interface.
In-game button mappings:
- L+R+Select+Start = Reset game
- L+R+Select+X = Reset to sd2snes menu
- L+R+Start+B = Disable cheats
- L+R+Start+A = Enable cheats
- L+R+Start+Y = Kill in-game routines (in case they interfere with game operation).
- L+R+Start+X = Temporarily kill in-game routines (~10 seconds – if you need to get past a glitch but don’t want to lose in-game buttons)
Download: SD2Snes Firmware v0.1.7 Beta/Preview (1500)
source: sd2snes.de
Apple IIe Power Supply Repair.
Defect:
- Dead with clicking noise in background (This power supply works even without load)
Replaced parts:
- Replaced 1 x 200uF 10V Electrolytic Capacitor.
Removed as a precaution the RIFA filter capacitor.
I must thank my friends which have contributed to the growth of my Repair Laboratory with donations of spare parts.
Donated items:
- 2 x Sega Dreamcast
- 1 x Sinclair 128+
- 2 x Amiga 500 Memory Expansion
- 1 x Amiga Powersupply
- 1 x Philips Multi Voltage Power supply
- 1 x Commodore CBM/PET Power supply (complete and working)
- 1 x 8088 Motherboard (Clone)
- 1 x Floppy Drive Controller (ISA Card)
- 1 x MDA/Parallel Controller (ISA Card)
- 1 x PC Clone (8088) Power supply
- 6 x Unknown Adapter/Interface
- 1 x Atari 7800 Motherboard
- 1 x Sinclair ZX Spectrum 48k Motherboard
- 1 x Pong Clone Motherboard
- 1 x Amstrad CPC 464 Motherboard
- 1 x Commodore 6499
- 1 x Power Supply C64/VIC20 (Clone)
Some new games or tools (Cracked / Trained or Unrealeased) for Commodore 64 have been released from your favorites groups.
Titles:
- Bozo’s Night Out +7HDG
- Vallation +6HD
- Foren Huren +Docs [pal/ntsc]
- Mag Max +8DGH +Pic
- Burnin’ Pen ’64
- Zappy Bird +2
- Ugh! +5DGM
- Eelona Preview +2
- Beyond the Night Run +3H
- Spike’s Peak 101% +7DGM
- I Can Remember +D
- Batman – The Caped Crusader USA + [ntsc/pal]
- Space Action 2 Preview
- Game Preview #1
- Game Preview #2
- Mad Ninja Preview
- Slug +30D +Fix
- King’s Valley Preview
- Burnin’ Pen ’64 [bugfix]
- Total Eclipse II -JEWEL-
- Mission Omega +1D
Download: All Games in One Archive (3181)
Commodore 16 Power Supply Repair
Defect:
- Output voltage in short circuit.
Replaced parts:
- Replaced 1 x 4700uf / 16v Electrolytic capacitor.
- Replaced 1 x 800mA Bridge rectifier.
This is another adapter (here the previous one) to replace the MPS 6550 RAM. This adapter replace a single MPS 6550 RAM chip in a Commodore PET 2001 with a standard 2114 RAM chip.
source: dasarodesigns.com
Commodore CBM 4032 (40 Columns) Repair
Defect:
- “Device not present” error when using the IEEE 488 port (Example Floppy Drive)
- Sometimes the computer show the prompt of the TIM monitor (Machine Language Monitor program)
Replaced parts:
- Replaced 1 x IC 6522 VIA (UB15)
- Replaced 1 x IC 6520 PIA (UB16)
Gallery:
This adapter replaces all ram installed in the Commodore PET 2001 with a 6264 Static Ram and is useful when one or more ram are faulty. These type of ram are no longer available to purchase.
NOTE: This adapter will only work to replace a chip with a part number starting with MPS 6550. They will NOT replace other RAM types used in Commodore computers other than the original Commodore PET 2001.
The original design was done by Donni of the VCF forum (Vintage Computer Forums).
Unfortunately these pcb have a design problem, below the fix which needs to be done (i always forgot to post this fix, sorry)
Download: Original printable version by Donni (1370)
Gallery:
Restoration the external case of the Micro Peripherals Ltd Floppy Disk Drive that was eaten by rust.
This is a screenshot from the Talk, a demonstration made by a Friend to explain how they worked the BBS. On the photo “Hidden Power / Nightfall WHQ’
A new demo for Commodore 64 by Algorithm/Onslaught.
Download: Variable Offset Amplitude (VOA) by Algorithm (1179)
source: csdb.dk
CBM prg Studio Version 3.1.0 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.
New features:
- Code Snippets.
- Improved VICE debugger support.
- New tutorial for mixing BASIC and machine code.
- Support for the Plus/4 in the screen code builder tool.
- Syntax colouring can be disabled.
- BASIC 8 support for C128 projects.
- Return to ‘jump to destination’ in basic programs.
Bug Fixed:
- Assembler:
- Zero page optimisation ignored if address contained arithmetic.
- Arithmetic with cheap labels ignored.
- GenerateTo ignored if wrapped in ifdef..endif
- Arithmetic would fail if using binary variables.
- Unknown labels in WORD sequences ignored.
- Incbin would fail with certain parameters and comments.
- Problems generating a .prg to a disk image.
- Screen Designer:
- 1×1 rectangle could throw exception in screen designers box tool.
- Mixed mode (multicolour and hires) screen designer (VIC20).
- Fill for rectangle tool.
- Debugger:
- SBC, ADC and RTI instructions not working.
- Improved cycle counting.
Download: CBM prg Studio v3.1.0 (1190)
source: ajordison.co.uk
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