| Please consider a donation to the Higher Intellect project. See https://preterhuman.net/donate.php or the Donate to Higher Intellect page for more info. |
Power Macintosh 7500: Difference between revisions
No edit summary |
|||
| Line 15: | Line 15: | ||
===Cache=== | ===Cache=== | ||
The computer has a slot for an optional second-level cache SIMM with 256 KB to 4 MB of fast RAM. | The computer has a slot for an optional second-level cache SIMM with 256 KB to 4 MB of fast RAM. | ||
===PCI=== | |||
The Power Macintosh 7500 and 8500 computers have three expansion slots using the industry standard PCI bus. The PCI bus is a nonsplit bus with 32-bit multiplexed address and data. The PCI expansion slots in these computers use a 33 MHz system clock. The Power Macintosh 7500 and 8500 computers accept standard PCI cards as defined by the PCI Local Bus Specification, Revision 2.0. The cards are required to use the 5 V signaling standard and to use the standard ISA fence described in the specification. Each computer provides a total of 50 W of power for its three expansion slots. Both 5 V and 3.3 V are supplied; the total power at both voltages must not exceed the 50 W maximum. | |||
=Compatibility= | =Compatibility= | ||
Revision as of 12:06, 24 June 2020
Based on the PowerPC 601 processor and PCI.
General Information[edit]
CPU[edit]
A 100 MHz PowerPC 601 microprocessor card with built-in FPU and optional Level 2 cache.
Memory[edit]
8 or 16 MB DRAM expansion up to 512 MB using 168-pin, 70 ns, 64-bit DIMMs.
Video[edit]
2 MB VRAM, expandable to 4 MB. One Digital Audio Video (DAV) slot. Video-in support via external port.
Cache[edit]
The computer has a slot for an optional second-level cache SIMM with 256 KB to 4 MB of fast RAM.
PCI[edit]
The Power Macintosh 7500 and 8500 computers have three expansion slots using the industry standard PCI bus. The PCI bus is a nonsplit bus with 32-bit multiplexed address and data. The PCI expansion slots in these computers use a 33 MHz system clock. The Power Macintosh 7500 and 8500 computers accept standard PCI cards as defined by the PCI Local Bus Specification, Revision 2.0. The cards are required to use the 5 V signaling standard and to use the standard ISA fence described in the specification. Each computer provides a total of 50 W of power for its three expansion slots. Both 5 V and 3.3 V are supplied; the total power at both voltages must not exceed the 50 W maximum.
Compatibility[edit]
Big-Endian and Little-Endian Bus Addressing[edit]
The Power Macintosh 7500 and 8500 computers support both big-endian and little-endian conventions for addressing bytes in a word. Byte order for addressing on the processor bus is big-endian and byte order on the PCI bus is little-endian. The Bandit IC performs the appropriate byte swapping and address transformations to translate between the two addressing conventions.