Recent content by joevt

I believe the intricacies are usually at the computer end and the display end. The KVM cable is just an extension cable. The KVM is probably not an adapter. You should be able to test continuity of all the pins between the computer side and the display side of the KVM switch with no computer...

I don't understand the problem. You have 15 pins on one side and 15 pins on the other. Connect one pin on one side to the corresponding pin on the other. Basically, the signals on the female connector of the KVM that connects to the Apple display need to match the signals on the female...

The instructions include these steps: cd /tmp git clone --depth 1 https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git cp -v linux-firmware/keyspan/usa28x.fw /lib/firmware/keyspan/ It's copying the file keyspan/usa28x.fw in the git archive from...

How does the TechStep serial stuff relate/differ to the Serial Test Manager stuff in Power Macs? The Serial Test Manager can't do headphone jack and ADB and SCSI tests like the TechStep can. In Power Macs, the Serial Test Manager has a menu that lists the supported commands...

AV in older Macs is usually done by DMA into the frame buffer of a graphics controller. This reduces work required by the CPU. I'm not sure if it affects RAM bandwidth if the video data is going directly to VRAM. Benchmarks to compare with AV play-thru happening and not happening might be...

Click the "Toggle BB code" button. Then edit the BB code. Use "Preview" to verify BB code changes. I usually edit posts as "BB code" unless I need to make a list or table or add a url to a forum post. Maybe A2 matches one of the other >hwinit fields?

Your post is missing a [ / code ] Right. I do 1000000 steps at a time usually. Sometimes 10000000. If you know where the code you want starts, then the until command works. Otherwise, you add some extra temporary watch point type code to the emulator itself to enter the debugger when something...

I think these lines are disassembled in the Part1.txt output of my DumpMacRom.sh script. I think you have that dump? The lines are 441 - 477, offset 000858 to 0008E8. Subtract 0x3c (the size of the COFF header of Open Firmware) from those offsets gives 0x81C to 0x8AC which matches your virtual...

Is there an Apple document that describes the hardware of the ANS 500/700? Found this: https://vtda.org/docs/computing/Apple/ANS/HardwareDevNotes.pdf It doesn't say much about the LCD. It does say writes should have a 1µs delay, (much less time than Open Firmware's 1 ms delay) so you may be able...

Does lcdstring have a man page? I would create a new utility that writes directly to the command and data registers like the Open Firmware driver does.

Attached all the Open Firmware stuff from the ROM. You can use the tbxi command to dump other parts. Strange it has the same version as the 8500 v2 / S900 rom. 077d.28f2 "Boot TNT 0.1p..]" 4096 962f6c13 √ 676809c236138574282fa8416c6c5a6d "./ROM PowerPC Mac/ROM 1.1.22 ANS 500 &...

There's probably a way but I only have apps for Mac OS 9 and OS X - neither of which is usable by the ANS 700? The ROM is mapped to last 4 megabytes of physical memory. So, one would map it, then copy it. I don't think you can call Open Firmware from most OS's. If you can't find a driver or...

Does the ANS 700 have the same ROM as an ANS 500? Here's the version, size, checksum, and md5 of the ANS 500 ROM: 077d.28f2 4096 962f6c13 676809c236138574282fa8416c6c5a6d "./ROM 1.1.22 ANS 500 The ANS 500 ROM has an Open Firmware driver for the LCD which does support some control and escape...

I think pm7100 requires more work. Same for pm8100. You said pm7600. Did you mean pm7100? DBOF does have Open Firmware code for the floppy. I haven't tested it. Have you tried it on your Power Mac 7100? Is the floppy formatted with HFS or HFS+? I think only FAT (little endian bytes at 0x1fe are...

si is slow, especially when there are big loops. It might be better to add commands or code in DingusPPC to enter the DPPC debugger when the code at the PPC or 68K program counter matches some bytes (which you would grab from the Mac OS Loader file). Another option would be to alter the code to...