
PA-RISC Chipsets Dino/Cujo
Wax is a secondary I/O controller complimentary to the LASI chipset. It implements various secondary
I/O functions and acts as a I/O bus to GSC adapter for different external buses as EISA, HP-HIL and
HP-IB. Most systems use it to complement LASI with other needed I/O functions that were previously
implented in diverse I/O ASICs. It is implemented in the same process and package as LASI.
Features
GSC bus interface with GSC+ features
EISA bus converter
– Interfaces GSC to the 32-bit EISA, so EISA devices can attach
– Does not provide complete EISA bus conversion — provides an “Intel i486-like” bus inter-
face, to which external EISA chips attach
– Interfaces to external EISA controller: TI TACT84500 (provides EISA bus control unit
EBCU and EISA peripheral control unit EPCU
– Integrates the EDPU (EISA data path unit) functionality on-chip
– Attaches to i486 bus for control, bus and IRQ, and directly to EISA for data
– Can be switched at power up to operate as ISA controller (to directly interface with ISA-only
devices such as Token Ring controllers etc.)
Serial interface — NS16550A compatible RS232 (software-compatible with LASI circuitry)
HP-HIL interface, compatible to previously separate HP HIL chip (1820-4784) used in older
workstations
HPIB interface for instrumentation devices, needs three external chips
Interrupt control
Timers (real time, watchdog)
0.8µ(micron) CMOS (HP CMOS26B process), packaged in 240-pin MQUAD
Wax chip numbers: 1FT4-0001
References
1. External Reference Specification (ERS) for the Wax I/O ASIC
61
Hewlett-Packard Company (May
1993, version 1.0 redacted)
2.4.5 Dino/Cujo
Used in
A180, A180C
B132L, B132L+, B160L, B180L+
C132L, C160L, C160, C180, C200, C240, C360
61
http://ftp.parisc-linux.org/docs/chips/WAX_ERS_V1.0_Redacted.pdf
50
Kommentare zu diesen Handbüchern