Recent content by joevt

Yes. A modem cable would be used to connect a modem to a Mac. A null modem cable is used to connect a Mac to a Mac. I guess an eMate would be in the Mac category. Check the continuity. https://forums.macrumors.com/threads/serial-app-to-old-world-of.2429025/post-33239745

A monitor with no sense lines might appear as not connected (sense code 7, extended sense code 0x3f = 11 11 11). This might not matter if connected to a graphics controller that is not from a 68K Mac or PowerPC Mac. The sense lines are used for DDC/CI and EDID on newer displays. Maybe you need...

Is the serial cable a null-modem cable? I think that's the same as a serial printer cable (Image Writer II) where the Rx on one end is connected to Tx on the other. It's the kind of cable you can use to connect two Macs together. After selecting the correct cable, you need to make sure both...

My AllRez project (for Mac OS X) can get VCP info. https://github.com/joevt/AllRez Maybe you can dump the info for your display and post the results here?

SysEnvRec sysEnv; OSErr err = SysEnvirons (1, &sysEnv); sysVRefNum of SysEnvRec is a working directory ID, not a volume reference ID or a directory reference ID. The currently running System file is always open. So you would get the file reference number (probably just kSystemResFile), and use...

So the IBM 5155 has an amber CRT for displaying NTSC but it works for non-NTSC in a SE or SE30 and the SE30's CRT can do NTSC using the 5155 CRT module (which is the circuit that controls the CRT and not the CRT itself). That means there's no real difference between a CRT for composite and...

googled this: https://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Interface%20Cards/Parallel/Interactive%20Structures%20PKASO/

Without a diode, the only multi resolution modes available are for VGA and Multiple Scan 13" or 14". The latter requires a line from sense 2 to sense 1 in place of a diode with ground on sense 0. If you have just a ground on sense 0, then it's 640x480 67Hz only.

Correction: To debug multi-boot on B&W G3, use this: dev / " " encode-string " AAPL,debug-bootpathsearch" property

The diagram at #31 says the spacing between rows is 3mm so 2mm plastic spacers should have fit. The fact that the plastic spacers don't fit means the spacing between rows is less than 2mm (which is obvious looking at your PCB). In that case, you could try pin headers of < 2mm, 5 pins...

A diode from pin 10 (SENSE2) to pin 7 (SENSE1) with ground on pin 4 (SENSE0) is for MultiScan 21" displays. VGA uses a wire instead of a diode between SENSE2 and SENSE1 with SENSE0 not connected. #41 #42 VGA and MultiSync 21" are probably the two best choices for an...

You said it hangs with the cursor on a gray screen. I think that is beyond Open Firmware after a boot device has been chosen. None of the default items in no-boot is a PCI device. There's no dev aliases for the PCI slots except for screen which points to a graphics card or a child device of a...

The process takes a while. If you enable some debugging options (such as by using the setenv AAPL,debug-bootpathsearch command) then it might show what it's scanning during the process. Newer version of Open Firmware may have different names for the debug options or more debug options. If you...

B&W G3 can't boot USB or FireWire. You can invoke the text based boot picker using the multi-boot command. On later Macs, that command is graphical based, and multi-boot-menu is text based...

PCIe cards have only one notch which is near the back plate. They also have a tab nearer to the back plate to stop it from being inserted into a PCI slot. https://en.wikipedia.org/wiki/Peripheral_Component_Interconnect https://en.wikipedia.org/wiki/PCI_Express