It's April Fools Day already and I haven't gotten near as much done for MarchIntosh project as I'd hoped. COVID and a bad reaction to second shingles shot afterward took care of that. But the PowerBook100/RPi-CM4-Lite is coming along with the arrival of a benchtop power supply for the LCD today...
Can't imagine there'd not be a performance hit, but how bad might it be?
Duo2300c would actually be the target machine. Pretty much same machine as 5300/1400, but with SCSI HDD option (supports SCSI HDD/Cable in upgrade package config) but no PCMCIA availability.
So curious . . . for a...
Non-Flammable components beginning to arrive! :p
1920x1200 will be a workable resolution running under Ubuntu in a 10.1" diagonal. Much better than most laptops with 1920x1080 and far better than lower resolutions of many.
Love the modern look of the larger LCD. No mounting tabs, but that...
I'll dig up the info, hopefully still on eBay purchase list. Centrifugal blowers are far more efficient at moving air than bladed fans and throwing the flow at right angles is perfect for this. Outlet's pointed straight at G3 card heat sink and HPV card which conflicts with 3.5" HDD installation...
I wish I'd your post over here first, I'd love to have a rework of this section as a Square -> Round duct converter for better airflow, with the blower mount at about the level of the ribs with a carrier for 2.5" HDD or BlueSCSI overtop the blower. Make for an nice bloweroni-SCSI-sandwich, that.
The every other frame notion is a worst case, last resort kinda deal. Spitballing every nasty approach I can possibly come up with here. ;)
Vampire Video in the IIsi is a well and truly diabolical affair:
- was wondering about bit-banging the DRAM frame buffer to do an end run around RBV...
Looks like we might keep it digital on a IIsi board reload for SE/30?
The video signals are generated by the Apple custom RAM-Based
Video (RBV) chip and are driven through a combination color
lookup table (CLUT) and video digital to analog converter (VDAC)
chip. Each monitor identifies itself...
Old project, wondering where it has gone. Full feature set here.
Features
CRT and LCD display support
24bit Standard VGA interface
Separate VSYNC/HSYNC and combined CSYNC synchronization signals
Composite BLANK signal
TripleDisplay support
12bit Interface
Compatible with DVI transmitters and...
:ROFLMAO: No power jack, no problem . . .
TwinSlot fitment prototype of paper and cardboard laminated with flammable adhesives sitting in the PCI slot of an Alchemy/Gazelle machine that might be fired up however . . . :eek:
Caffeine is finally kicking in. :confused:
Time shift can only be achieved by dropping every other frame? Would this induce unacceptable flicker?
Wouldn't work on an LCD, but such wouldn't be required as it's digital to digital, no DACRAM timewarp required. However, phosphor latency of CRT...
Don't wanna tangentially muck up the fabulous IIsi into SE/30 thread that @zigzagjoe has running over at the MLA with this craziness.
@Bolle posted parameters of the conversion problem.
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The Apple 12" 512x384 video...
. . . one piece at a time! :p
/JohnnyCash
Tucked everything away and started looking for missing bits of a PowerBook 165c. I'm trying to get it back together to finally test after I snagged it for the MacAntFarm™ project two decades ago. I'd already acquired a couple of victims for that...
Looks like PowerBook 100 batteries are only 6V, so I guess the new build batteries from @360alaska are out of the picture. :confused:
Unless someone chimes in with a better idea, I'll just go ahead with current limiting resistors on a thin PicoPSU I found today for the time being. Still...
Well that didn't take a lot of research!
Looks like I should be able to desolder the "internal" HDMI connector and replace it with the cable connector from this board! 😀
Looks to be fine in the component placement pics above. But should this plug card protrude too far out of the HDD cubic...
Settling into waiting (impatiently) for components to arrive mode again. After all these years in process I should really be more patient. :rolleyes:
Component placement experimentation:
The PCIe adapter for M.2 fits into the metal case for my setup, but is about a quarter inch too tall...
Very interesting, reminiscent of Virtual Desktop features of early VidCards supporting far higher resolutions than their RAMDAC and contemporary displays could support. What's the highest resolution that card can support on its external connector?
. . . yet again as once more, this is way above my pay grade. :oops:
When spec required 5V for LCD and 12V for Pi/CM4 board, notion was to use a PicoPSU and its AC adapter. Figured I only needed current limiting resistors for those two Pico lines.
Now I only need 12V input for both, which...
