Computer Hardware User Manual

Table Of Contents
3-10 Computer Group Literature Center Web Site
PCCchip2
3
Overall Memory Map
The following memory map includes all devices selected by the PCCchip2
map decoders, including those internal to the chip and those external.
These devices respond only when the Transfer Type signals carry the
values of %00 or %01 which correspond to Normal and MOVE16 accesses
on the Local Bus.
Table 3-1. PCCchip2 Devices Memory Map
Address Range Selected Device Comments
$FFF42000-$FFF4203F PCCchip2 Registers See Programming Model
$FFF42040-$FFF42FFF PCCchip2 Registers Repeated
$FFF43000-$FFF43FFF MCECC (Memory Controller) External Device
$FFF45000-$FFF450FF CD2401 (SCC) External Device
$FFF45100-$FFF45FFF CD2401 (SCC) Repeated
$FFF46000-$FFF46FFF 82596CA (LANC) External Device
$FFF47000-$FFF47FFF 53C710 (SCSI) External Device
$FFF80000-$FFFBFFFF Reserved External Device
$FFFC0000-$FFFCFFFF DS1643/M48T58 (BBRAM,
TOD Clock)
External Device