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**CS8238 CHIPS/280 & 281 (386 MCA)(82C321/322/325/223/226) c:Aug89
***Info:
CHIPS/280 is a 7-device, enhanced CMOS implementation of most of the
system logic necessary to implement personal computers compatible to
IBM PS/2 Model 70/80. CHIPS/280 enables OEMs to offer compatible PS/2
models 70/80, that are more integrated and superior in performance
than IBM's Model 70/80.
CHIPS/280 includes the CS8238 System Logic CHIPSet, the 82C607
Multi-Function Controller with Analog Data Separator and 16550
compatible serial port, and the Enhanced Gate-Level Compatible
82C451/452 VGA chip as indicated in Figures 1a and lb [see data
sheet]. With these 7 VLSI devices, it requires only 59 additional
components plus memory to implement compatible PS/2 Models 70/80
superior to IBM's models.
CHIPS/280 is designed to maximize the performance of the 80386
microprocessor by coupling it to a high performance page/interleaved
memory sub-system. The maximum page size supported by the CHIPS/280
architecture is 16 KBytes when 1 Mbyte DRAMs are used (16 MB of
onboard Memory) and the four way interleaved mode of operation is
selected. When executing within a page, the DRAM memory sub-system can
execute at the same speed as the processor. To the 386, the mem- ory
sub-system appears as a 16 KByte direct mapped cache, using relatively
inexpensive DRAMs. When operating at 16, 20 or 25 MHZ, the average
waitstate incurred is less than 0.7. Additionally, by using Shadow RAM
techniques, the BIOS code can also be executed with near zero wait
states.
In addition to the high performance memory interface, CHIPS/280
supports a fast Matched Memory Cycle reducing the access time from 200
ns to 120 ns at 25 MHz. CHIPS proprietary Fast VGA cycle allows VGA
I/O accesses to be performed within 187.5 ns@ 16 MHz, 150 ns @ 20 MHz,
and 120 ns @ 25 MHz.
Regardless of the CPU speed, the DMA controller operates at 10
MHz. Once the DMA and the peripherals are tuned, for example, with a
1:1 interleaving on the Hard Disk, CHIPS/280 continues to deliver
dependable high performance.
***Configurations:...
***Features:...
**CS82310 PEAK/DM 386 AT (82C351/82C355/82C356) c91...
**CS8281 NEATsx (386SX) (82C811/812/215/206) c:Dec89...
**CS8283 LeAPset-sx (82C841/82C242/82C636) c:Mar90...
**CS8285 PEAKsx (82C836/82C835) c91...
**CS8288 CHIPSlite-sx (82C836/82C641/82C835) c?...
**CS4000 WinCHIPS (64200/84021/84025) c92
***Info:...
***Configurations:...
***Features:
Flexible Systems Logic
o Supports 486DX, 486SX, 386DX and Super386 CPUs
o Supports 487 and 4167 on 486 CPU mode and 367, 3167 on 386 CPU
mode
o Burst Mode support in cache and DRAM modes
o 64K, 128K, 256K, and 512K cache size
o Direct0mapped, write back operation, with pipeline allocate on
read miss
o 2-1-1-1 burst for cache reads to the 486 and 486SX
o interleaved data SRAMs
o 3-1-1-1 burst read with 486SX CPU at 16/20/25 MHz with no cache
o 256K, 1M and 4M deep DRAM support
o Support for 4Mx4 DRAMs with 12/10 or 11/11 addressing
o Page mode DRAM access with option of using page interleaving
o Up to 8 banks of 32-bit DRAMs
o Option for using asynchronous or synchronous AT clock
o Fast 12 MHz AT bus support
o Local bus master and slave support
o Programmable I/O chip select output signals
Designed for Cost Effective Windows Acceleration
o Workstation-like graphics performance achieved via the 64200
Wingine
Memory Bus Architecture
o Highly integrated design (non-multiplexed system bus, direct bus
drive, minimum external glue logic)
o Direct linear mapping of entire video memory anywhere in system
memory space
o Flexible video memory configurations
o supports high resolution display modes with 2MB VRAM
o Full VGA compatibility in 'VGA' mode
o Interfaces directly with the 82C481 True-Color Graphics
Accelerator
**CS4021 ISA/486 (84021/84025) c92...
**CS4031 CHIPSet (84031/84035) 5/10/93...
**CS4041/5 CHIPSet (84041/84045) 2/10/95...
**CB8291 ELEAT [no datasheet] c90...
**CB8295 ELEATsx [no datasheet] c90...
**82C100 IBM PS/2 Model 30/Super XT ?...
**82C110 IBM PS/2 Model 30/Super XT ?...
**82C235 Single Chip AT (SCAT) c89...
**82C836 Single Chip 386sx (SCATsx) <91...
**F8680/A PC/CHIP Single-Chip PC c93...
**
**Support Chips:
**64200 (Wingine) High Performance 'Windows Engine' c:Oct91...
**82C206 Integrated Peripheral Controller c86...
**82C601/A Single Chip Peripheral Controller <08/30/90...
**82C607 Multifunction Controller <Jun88...
**82C710 Universal Peripheral Controller c:Aug90...
**82C711 Universal Peripheral Controller II c:Jan91...
**82C712 Universal Peripheral Controller II c:Jan91...
**82C721 Universal Peripheral Controller III c:May93...
**82C735 I/O Peripheral Controller With Printgine c:Jul93...
**82C835 Single CHIP 386sx AT Cache Controller c:Apr91...
**F87000 Multi-Mode Peripheral Chip 11/23/93...
**Other:...
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*Contaq . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82395SX Smart Cache 12/17/90
***Notes:...
**82396SX Smart Cache 12/17/90...
**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91...
**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91...
**82496/491 Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**82498/493 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**
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**450NX (?) 06/29/98:...
**????? (Profusion) c:99...
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