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Video random-access memory (VRAM) is dedicated computer memory used to store the pixels and other graphics data as a framebuffer to be rendered on a computer monitor. [1] It often uses a different technology than other computer memory, in order to be read quickly for display on a screen.
The display is capable of supporting up to thousands of colors with a video memory upgrade. A slightly updated model, the Color Classic II , featuring the Macintosh LC 550 logic board with a 33 MHz processor, was released in Japan, Canada and some international markets in 1993, sometimes as the Performa 275.
Dual-ported video RAM (VRAM) is a dual-ported RAM variant of dynamic RAM (DRAM), which was once commonly used to store the Framebuffer in Graphics card, . Dual-ported RAM allows the CPU to read and write data to memory as if it were a conventional DRAM chip, while adding a second port that reads out data.
The 68020 has many improvements over the 68000, including an instruction cache, and was the first Mac processor to support a paged memory management unit, the Motorola 68851. The Macintosh LC configured the 68020 to use a 16-bit system bus with ASICs that limited RAM to 10 MB (as opposed to the 32-bit limit of 4 GB).
The M3's Unified Memory Architecture (UMA) is similar to the M2 generation; M3 SoCs use 6,400 MT/s LPDDR5 SDRAM. As with prior M series SoCs, this serves as both RAM and video RAM. The M3 has 8 memory controllers, the M3 Pro has 12 and the M3 Max has 32. Each controller is 16-bits wide and is capable of accessing up to 4 GiB of memory. [14]
The Apple product was faster (4 MHz vs 3.6 MHz), and the $126 difference in price between the two computers was much smaller than the IIc's $300 + premium over the Laser 128, but the 128EX/2's memory was more easily expandable, important to AppleWorks users. The magazine concluded that while the "128EX/2 is a slick machine, the most fully ...
The computer had a $2,400 list price; it and the new $600 12-inch color display were $3,500 less expensive than the Macintosh II. [2] Not long after the Apple IIe Card was introduced for the LC, Apple quietly removed the IIGS from its price list, forcibly retiring it, as the company wanted to focus its sales and marketing efforts on the LC. [3]
The Macintosh Plus was the last classic Mac to have an RJ11 port on the front of the unit for the keyboard, as well as the DE-9 connector for the mouse; models released after the Macintosh Plus would use ADB ports. The Mac Plus was the first Apple computer to utilize user-upgradable SIMM memory modules instead of single DIP DRAM chips. Four ...