HP B160L Bedienungsanleitung Seite 41

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PA-RISC Processors Other processors
4. A 120-MHz BiCMOS Superscalar RISC Processor, Shigeya Tanaka et al (IEEE Journal of Solid-
State Circuits, vol. 29, no. 4, April 1994)
2.2.18 Other processors
Table 2.2: Other PA-RISC processors overview
CPU ISA Clock
max
FETs Cache Bus Super
scalar
Units Controllers
on-chip
Winbond
W89K
PA 1.1
32-bit
33/66MHz 1.1M 2/2KB I/D
on-chip L1
Intel
486
1-way 1 Integer none?
Winbond
W90210
W90215
PA 1.1
32-bit
33/66MHz ? 4/8KB I/D
on-chip L1
Intel
486
1-way 1 Integer
MAX-1
DRAM
DMA
PCI
I/O
Winbond
W90220
W90221
PA 1.1
32-bit
150MHz ? 4/4KB I/D
on-chip L1
Intel
486
1-way 1 Integer
1 MAC(DSP)
MAX-1
DRAM
DMA
PCI
IDE
I/O
VGA
(W90221)
TV (W90221)
Oki OP32 PA 1.1
32-bit
33MHz 1.1M ? ? 1-way 1 Integer DRAM
DMA
Winbond W89K
Time of introduction: Spring 1994
The Winbond W89K is an embedded 32-bit PA-RISC controller chip, pin-compatible with the then-
popular Intel 80486DX. It could be used as a drop-in replacement in mid-1990s PCs together with
Winbond BIOS replacement chips. Rationale was to allow hardware developers utilize existing 486DX
mainboards and components for a shorter product development process. The W89K is a level 0 PA-
RISC 1.1 implementation: a 32-bit PA-RISC processor without virtual addressing.
PA-RISC version 1.1 (third edition) 32-bit
Level 0 implementation (no virtual addressing): no MMU
Five-stage pipeline
One functional unit: one 32-bit integer ALU
2KB/2KB I/D on-chip L1 caches
80486 (Intel) bus interface
33MHz and 66MHz clock speeds were available, with the latter apparently having been achieved
with a clock-doubling also used in the Intel’s 80486DX/2 (the chips uses an internal clock-doubler
on the external 33MHz bus)
On-chip JTAG support
14.3×14.3 mm
2
die, 1,100,000 FETs, 0.8µ(micron), 3-layer metal CMOS
References
34
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