Search results

1152x870 is the best I ran across. However, with 1.5 MB of VRAM, I would think it could do more at 8-bit color.

A short update: I tried this video mode. I thought it was going to be some weird split screen or require a toggle key. The Vimage card is set to the same resolution as the internal video. When you scroll the mouse cursor to the side of the internal video screen, the image switches to where the...

Photos of the GrandVimage 17DU card. Bodge crystal and bodge diode. Nice choice of resolutions. 80 MHz clock and 1.5 MB of VRAM.

Here's a treat for @daanvdl if he hasn't already seen it. The Interware GrandVimage 17DU LC slot video card has a connector that installs in the video slot. This enables a variety of choices for monitor output. Going left-to-right and then the second row: 1. Disable the internal monitor and...

I can confirm the Power Macintosh 4400 can indeed reach 160 MB of RAM.

What a surprise! That's crazy. I would never have believed that.

Also... no Color QuickDraw in them SE ROMs.

Congratulations!

Thank you for the follow up. This makes a lot of sense, since the chip is written to 16-bits at a time. To reverse the process, either flip 16-bits at a time, or flip the bits of each byte and flip byte pairs. That Python code is nice and simple.

I just looked more carefully at the picture of your card and realized how many different 'Thunder' cards there are. Ignoring the additional terms such as '8', '24', 'GX', 'GT', '1152', '1360', '1600', there seem to be at least five different generations of 'Thunder' cards. NUBUS SuperMac...

The printed SuperMac Thunder II GX Product Update Notice says: I recognize you are asking about the Thunder (I), not Thunder II. Also, I recognize the SuperMac is less than helpful in providing only a single sentence, rather than an explanation about what exactly is not compatible. FYI. You...

Yes. Agreed. All three examples print as straight 7-bit ascii after having the bits reversed in each byte. However, the first example "Golden Software" needs its byte pairs swapped as well. I don't know if that got written using a different process. In any case, cool work on REing the NVRAM.

I have good news, but also something weird that probably has a simpler solution. First, after reversing the bit order for LSB/MSB, the data is just the lower 128 characters of ASCII. Nothing fancy. Just mask out the top bit (end of string bit) and print the character. You don't need special...

Very cool detective work. However, I don't quite understand the bit pattern. In your post, you say the char data offset is bits 1-4. That only allows for 16 characters. in your code, you seem to be using bits 1-5 (aka 0-4) which would provide 32 characters (minus 1 for the special case space)...

I have a number of Quadra 630 computers. Recently, I picked up a spare board that motivated me to take a closer look at some of the differences. Thus far, I have found three different boards in Quadra/LC 630 series of computers: 820-0548-B (the most common). One double-bank RAM slot. One...

Yes! It is my hope that people will replicate as much of the software, manuals, and knowledge into as many public repositories as possible. I think we all recognize that any single site can disappear from the internet without warning. I am glad to be part of a community that recognizes the value...

Good advice and video. This year, I wrote an application that combines the BinHex (.hqx) file converter and communication software. It works on all Macintosh computers from System 1 to System 9, including emulators. And, like in the video, you can use any terminal application on a PC or modern...

That's incredible! Good write up. Thank you for sharing this.

Just to be clear, the modem port will work fine. That resistor is part of the board as shipped by Apple. So, don't remove it.

That is R8 100K which pulls RXD+ high (to 5V) on the modem port. This would provide a default signal to prevent electrical noise from being interpreted as incoming data. The modem port is serviced by an interrupt (unlike the printer port in early Macs), and thus false incoming data could...