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Post Aprl29ziOYTC0iLuV6 by [email protected] |
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More posts by [email protected] |
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Post #AoeYcJd6xbYpR7jwVk by [email protected] |
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I've been working for a few days to restore an Amiga 3000 from 1990 which w… |
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Post #AoeZhF4BSDTmgZJeEa by [email protected] |
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Extracting Denise and Paula reveals some corrosion on the pins.Fat Agnus appear… |
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Post #AoiHKrav1LZUyVe9B2 by [email protected] |
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Against best advice, I took the risk to power up the board in its present state… |
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Post #AoiHKrtLuoJhtgGruS by [email protected] |
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Today I received the first batch of components for my A3000 board. Just a few D… |
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Post #AoqqyMcYeMxw9ifBpY by [email protected] |
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I scrubbed most of the green goo with a combination of sand paper and fiberglas… |
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Post #AoqqyMrnjh9uuznMae by [email protected] |
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And this is what was underneath all the corroded metal oxide.Most of the copper… |
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Post #AoqqyN393WEVUB6QGu by [email protected] |
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It's time to clear the corroded components, starting from the RTC circuitry… |
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Post #AoqqyNC0WZK1vfFV5M by [email protected] |
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Except for the Ricoh RTC, the components I pulled are cheap to replace and can … |
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Post #AoqqyNP7jnoWaLNyWu by [email protected] |
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Luckily, I have with me a debug tool from the future: the Z3660 is an open hard… |
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Post #AoqsiaXFLhgKaLmh8K by [email protected] |
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The Z3660 can load Kickstart files from an SD-card and map them to the ROM regi… |
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Post #AoqtukjHNDMFdAmEFc by [email protected] |
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The Z3660 can also boot off an emulated SCSI controller, loading hard-disk imag… |
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Post #Aoqu8RKUIYzJW8huym by [email protected] |
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There are a couple of hardware diagnostic tools, including SysInfo and WhichAmi… |
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Post #AoqucRjHNNzxRebyr2 by [email protected] |
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Also, rebooting with Ctrl+Amiga+Amiga results in a permanent black screen. I in… |
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Post #Aowwm73QSx4B4iX1bE by [email protected] |
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Tonight I'm going to the Artisans Asylum, a huge #hackerspace and workshop … |
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Post #Aowwm7EPo5rBcnfnjE by [email protected] |
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One of the issues leading to instability seems to be the 4MB bank of on-board f… |
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Post #AowxaDDloOs6gFG8wa by [email protected] |
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The #Amiga 3000 fast RAM uses the infamous Zig-zag In-line Package (ZIP).The pi… |
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Post #Aoz6sJsR5l46RIuRfc by [email protected] |
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Anyway, re-seating all the ZIP chips didn't improve stability, so I ended u… |
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Post #Aoz6wxR5xEJsHuKg2S by [email protected] |
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Using modern hardware to sidestep hardware issues on the A3000 board feels a bi… |
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Post #Aoz8Vx3zQpFdDnm8ye by [email protected] |
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With on-board Fast RAM disabled, the system is stable enough to run Lotus Turbo… |
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Post #ApDc2ri3yV6b3d0NUG by [email protected] |
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Last friday I started debugging the ZIP RAM bank.Someone on the Acill Classics … |
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Post #ApDc2rupD3JVhCyZNY by [email protected] |
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Meanwhile, I also checked the reset logic, which I suspect to be quirky.The A30… |
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Post #ApDc2s3gg6P28h7eC0 by [email protected] |
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On power up, +5V (still below) raises quickly to its stable level, while /FAIL … |
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Post #ApDc2sEK2YuSfg68lk by [email protected] |
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But is this what a good reset signal looks like? I expected it to be driven sha… |
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Post #ApDc2sOFReqjASk4Ey by [email protected] |
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The Kickstart 3.2.2 roms arrived today, and I swapped them on the board.Oddly, … |
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Post #ApFT29IkZb1u3YfWEa by [email protected] |
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@codewiz Have you tried compatibility with Games (especially those what will on… |
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Post #ApFT29U5tQ6UcjyZuq by [email protected] |
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@AmigaBoing I tried booting the original SCSI hard drive that came with the mac… |
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Post #ApFT4nvOVXO4cu0hEm by [email protected] |
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I'll get a KickSmash32 when the next batch is ready:https://github.com/cdho… |
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Post #ApFTf23tQKietfGCJ6 by [email protected] |
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With the new #AmigaOS 3.2.2 ROMs in place, I can even pull out the Z3660 and us… |
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Post #ApFVKeqwCiyl23c4cy by [email protected] |
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But I forgot to cover how I fixed the stability issues.Testing the corroded tra… |
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Post #ApFW0qzDTxyypHbciu by [email protected] |
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@codewiz @AmigaBoing where do you sign up for one? |
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Post #ApFWgOIkWScw1XY5AW by [email protected] |
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The yellow alligators reconnect Paula's INT6 to Even CIA.The trace was badl… |
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Post #ApFYVuOR4922HGL09Q by [email protected] |
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As a side note, the test clips I got from Amazon for $6.89 a dozen won't at… |
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Post #ApFYVuZ4QbXSoFJUjA by [email protected] |
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Anyway, this is my first attempt at repairing traces with thin rigid wire.I use… |
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Post #ApFZTvtcbfvmJWXwrg by [email protected] |
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Yesterday I also started pulling out the corroded passive components right abov… |
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Post #ApFa8PNUPhctKiojFw by [email protected] |
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And here are the new components: the blue resistors, the two diodes and some th… |
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Post #ApHZRKeOVDk0XH6UiW by [email protected] |
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I'm not too proud of my first ever attempt to repair a trace with magnet wi… |
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Post #ApHZRKrViSEVBxEyA4 by [email protected] |
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Last week I soldered back the Ricoh RP5C01 and the D flip-flops which latch the… |
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Post #ApHZkg6WxhfkZkUOXI by [email protected] |
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After populating the various resistors, capacitors and diodes, the RTC is final… |
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Post #ApHaXppvZBSYwuAApE by [email protected] |
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To finish the job, I ordered this little kit which adapts a "coin battery&… |
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Post #ApHas3MWzH3Ags3P6W by [email protected] |
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To finish the job, I ordered this little kit which adapts a "coin battery&… |
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Post #ApTv6bXMGoJ8L3oB9c by [email protected] |
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Perhaps it would just be simpler to disable the original charging circuitry by … |
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Post #ApTv6bjPXzwswRRnwO by [email protected] |
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While my last retrobrighting experiment proceeds quietly at home (*), I went to… |
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Post #ApTzvS77SrvVhN2ME4 by [email protected] |
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Since it's my first attempt at SMD soldering, I watched a couple of video t… |
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Post #ApUBHSn8iyPtfQOEaG by [email protected] |
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And that's it... phew! ๐Now I just need to solder the battery holder on … |
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Post #ApUBh35ktjgHURIUnA by [email protected] |
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And voilร ! The RTCPWR pin is receiving 3.3V and the oscilloscope confirms that… |
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Post #ApUNOfoxsWvVYQRq9w by [email protected] |
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@codewiz ohhhh it looks like in just under 1 month you went WELL beyond my own … |
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Post #ApUPXc5bK1UCUlcVMm by [email protected] |
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Today I also did a quick 3D-printing test for a pass-through bracket to bring H… |
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Post #ApcT2XSISGPwEALxBo by [email protected] |
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I tried learning #Blender to model the HDMI + Ethernet bracket from scratch, bu… |
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Post #ApcT2XhtWGtV0XePVA by [email protected] |
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Parametric #CADs let you specify constraints on the sizes, distances and angles… |
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Post #ApcT2Xr6y0GbT7xlrs by [email protected] |
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For instance, even with the early #Amiga ray-tracing packages such as Imagine a… |
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Post #ApcT2XzyR3M7uc6qgK by [email protected] |
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You could extrude a profile around an axis to make radial shapes such as a vase… |
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Post #ApcuIJpPaN1zMKujNw by [email protected] |
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Real 3D, one of the first solid modelers featuring constructive geometry, boole… |
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Post #ApcuIK4efhDy7c2u92 by [email protected] |
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But I digress. I went to the Artisans Asylum with this rough #FreeCAD design to… |
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Post #Apcwp8fgHtU4Dm8kbo by [email protected] |
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Everything fits together, but I couldn't find suitable self-tapping screws … |
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Post #ApcxOaMXKABQEu5UvY by [email protected] |
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Everything fits together, but I couldn't find suitable self-tapping screws … |
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Post #ApcxTS8pJkeyBpzoUC by [email protected] |
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I noticed now for the first time that the top Zorro slot of the #Amiga 3000 is … |
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Post #ApeeSd09wcMelmkrtg by [email protected] |
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@codewiz yes, A3000s were supplied with an a2000 video slot adapter bracket tha… |
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Post #ApeeSd8fQzAbCAjf9s by [email protected] |
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@jope Ah! Forgot that I had one of these A2000 video slot adapters in the box o… |
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Post #ApgVijOrPdQvyZpfGa by [email protected] |
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To complete my #Amiga 3000 restoration, I still need to solve a small mechanica… |
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Post #ApgVije6Uxcujqxq1g by [email protected] |
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I could just cut an opening right over the RJ45 connector. So I took some measu… |
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Post #ApgXIQ5SnJsgSQLCSG by [email protected] |
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Ugh. Cutting square holes with a hack saw isn't as easy as it seems ๐ฐI g… |
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Post #ApgZradhkkfDEEFsqe by [email protected] |
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After some filing, that hole looks a little smoother ๐ |
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Post #ApgZranz8Wt3k745s8 by [email protected] |
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With tape covering the rough edges, the result is almost presentable ๐#amiga… |
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Post #ApgZrazKSLxeJIN9YO by [email protected] |
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To be honest, #Commodore designed a terrible drive bay for the #Amiga 3000.It&#… |
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Post #AppbPOhmTmJORCUArI by [email protected] |
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I carefully stored all the screws and other loose parts, but I didn't track… |
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Post #AppbPOsPqEooyBSfR2 by [email protected] |
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Epilogue: the #Amiga 3000 is back in one piece, fully restored including the ba… |
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Post #AppbPP33ChKFVARA0m by [email protected] |
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Since I couldn't figure out what happened and how to repair the FFS directo… |
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Post #AppnsLfI3oKMrAtMrA by [email protected] |
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Since I couldn't figure out what happened and how to repair the FFS directo… |
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Post #AppnsLo9WrPtIf2Rfc by [email protected] |
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@codewiz This A3000 is gorgeous and your repair is unbelievable. Just, I'm … |
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Post #ApqI3CzPeYQzlDOmaO by [email protected] |
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@batteman @codewiz it's too common for ffs to corrupt itself after a crash … |
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Post #ApqI3D8d6Ho6Dni8x6 by [email protected] |
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@jope @codewiz You're totally right. I don't use SFS on my classic Amig… |
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Post #ApqyQSfJjUkP76lm40 by [email protected] |
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I also had three SFS partitions on my hard drives: Work, Store and BBS.However,… |
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Post #Aprl29pmzSWvVvhz1s by [email protected] |
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@jope @batteman @codewiz Uhm, never had good luck wie AFS/SFS/whatever... with … |
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Post #Aprl29ziOYTC0iLuV6 by [email protected] |
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@ij @batteman @codewiz the lack of +4GB compatible ffs repair tools was a probl… |
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Post #Aprl2A8DsvH8R6KhlI by [email protected] |
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@jope @ij @codewiz Never tried it (and don't use FFS anymore since a long l… |
