I just received some old Macs with rather unknown cards (to me at least).
One is a Modam Mac II Interface - a 12" Nubus graphics card with DB9 video port. It has 4 NEC dual port VRam chips 41264-120 64kx4bit. That is the same IC used on the Apple High Resolution Display Video card. I have once upgraded this card from 256k (stock) with 8 ICs to 512k. The Toby has 16x TMS4416-120 64kx4bit as well. So I guess, 64k x 4bit makes 32kb per chip. Is that correct? That means the Modam card has 128k VRam. As it sports a DB9 Port, I guess it's a 1bit card. Not even grayscale.Does anyone has any info about Modam or the cards specs and features (Resolution etc.)?
The other one is Radius Mac II Two Page Display Adapter. There are a few chips on it, but only 4 look like VRAM. And again, it's the 41264-120 - just in a different package: 24pin plastic ZIP instead of 24pin plastic DIP. The other chips seem to be GALs and Bus drivers etc.: M74ALS646P, SN74ALS573....
The next is an accelerated Radius 8bit graphics 12" card. It come with Toshiba TC528267J-70 dual ported VRam in 262.144 word x 8bit. The Futura II LX i have has the same 262.144 x 8bit VRam organisation and is supposed to have 3mb VRam. As the Radius card has 1/3 of the VRam chips, I guess that gives it 1mb VRam. So I guess, 262.144 x 8bit makes 256kb. However, I cannot find any information about this card, the exact driver and what resolutions it supports.
One is a Modam Mac II Interface - a 12" Nubus graphics card with DB9 video port. It has 4 NEC dual port VRam chips 41264-120 64kx4bit. That is the same IC used on the Apple High Resolution Display Video card. I have once upgraded this card from 256k (stock) with 8 ICs to 512k. The Toby has 16x TMS4416-120 64kx4bit as well. So I guess, 64k x 4bit makes 32kb per chip. Is that correct? That means the Modam card has 128k VRam. As it sports a DB9 Port, I guess it's a 1bit card. Not even grayscale.Does anyone has any info about Modam or the cards specs and features (Resolution etc.)?
The other one is Radius Mac II Two Page Display Adapter. There are a few chips on it, but only 4 look like VRAM. And again, it's the 41264-120 - just in a different package: 24pin plastic ZIP instead of 24pin plastic DIP. The other chips seem to be GALs and Bus drivers etc.: M74ALS646P, SN74ALS573....
The next is an accelerated Radius 8bit graphics 12" card. It come with Toshiba TC528267J-70 dual ported VRam in 262.144 word x 8bit. The Futura II LX i have has the same 262.144 x 8bit VRam organisation and is supposed to have 3mb VRam. As the Radius card has 1/3 of the VRam chips, I guess that gives it 1mb VRam. So I guess, 262.144 x 8bit makes 256kb. However, I cannot find any information about this card, the exact driver and what resolutions it supports.
