Test and try: Three random motherboards and a Mac Plus chassis
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- Опубликовано: 1 авг 2023
- * Warning: Do not work inside a Macintosh unless you know how to be safe! There are dangerous voltages inside.*
On the bench today we have an unknown condition Mac Plus chassis and three unknown condition motherboards. Let's take a look at all of it and test it out. What works and what doesn't?
-- Video Links
Fixing a Mac Plus with intermittent faults:
• Macintosh Plus black s...
Adrian's Digital Basement Merch store:
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Support the channel on Patreon:
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Adrian's Digital Basement (Main Channel)
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-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.16...
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.com/products/digi...
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress.com/item/33000...
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/itm/TS100-65W-MI...
EEVBlog 121GW Multimeter:
www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/itm/USB-Logic-DS...
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfreight.com/4-inch-...
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/itm/14-16-18-20-...
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/itm/1-2-5-10PCS-...
Heat Sinks:
www.aliexpress.com/item/32537...
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=r...
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorecomputerclub.com/
--- Instructional videos
My video on damage-free chip removal:
• How to remove chips wi...
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
the long RAM chips on that Radius card are dual-ported 64kbit RAM, extremely expensive for the time period, but allows for the CPU to write to memory while the PALs over on the left scan it out.
Small correction: The CPU is doing none of the lifting to push pixels to the screen on that Radius FPD board. Yes the CPU is working as the blitter when moving pixels, but the CPU has zero interaction whatsoever in displaying the pixels to the screen. The NEC41264 VRAM is a special dual ported 64k x 4 DRAM with a 2nd serial port built in for extracting the video. This was absolutely the most bog standard VRAM of the era. The 2nd port used a set of four, 256 bit long shift registers which were occasionally loaded by the counter GALs. For a monochrome display, this equates to one host side VRAM cycle per display line but there was zero interruption of host CPU and that cycle could be tucked into the refresh. This is in contrast to a system like the ZX-81 where the CPU actually does the heavy lifting to push pixels to the screen. I remember installing a couple of those Radius FDP boards in pluses in the '90 to '92 time frame. Installing the video connector was the odd part.
I always enjoy your "Test and Try" type videos followed by your repair videos for stuff that didn't work.
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Having repaired a few of these Macs I would recommend using adhesive backed Velcro to reattach the backing board. It does tear them sometimes but I've found that if you get the weakest Velcro it's pretty safe. Unlike the double sided foam tape it's reusable.
Flight Simulator was originally by subLOGIC, but was licensed to Microsoft for DOS/Windows. Microsoft published the Mac version, but it was still developed by subLOGIC.
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I can explain the port if you would like.
Very nice video as always Adrian!
I remember in one of my places of employment there were several Mac Plus' with Radius full page monitors. The department was responsible for publishing marketing material and most of the monitors were physically rotated into Portrait orientation. A lot of legal size paper was in the printers and the big copier they used via a network.
Slightly yellow is quite a kind way to say "chain smoker" you're cracking me up Adrian 😂
22:30
14:50
I really like your videos, mainly the macintosh ones
Ah my very first Mac. Bought a brand new one in 1991 for $4000 bucks.
I had the IIGS port of Dark Castle as a kid … hard is an understatement.
I played around with one of those when i was a youngster at my Uncle's place, he still have it, it make a nice decoration on a shelf.. 🙂
I love that desktop background.
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Great video, and funny hot glue statement. I resemble that statement! Ouch! Sure I put the glue on there, but I forget! heh I love the cool use of reflection.