Rev.A
Hardware Specifications 5-5
Developer's Guide SR-600
Confidential
DMA
The 8237A-, which is equivalent to two DMA controllers and supports seven DMA channels, is
mounted in the SR-600. Channels 0, 1, 2, and 3 provide 8-bit data transfers; channels 5, 6, and 7
provide 16-bit data transfers. The SR-600 uses channel 2 for the floppy disk drive controller, and
releases other channels to the ISA bus.
The DMA channel assignments are shown below.
* When LPT1 is in ECP mode, use one of the channels.
Table 5-2 DMA channel assignments
Controller
Channel
Application
DMA1 8 bits
0
(Spare)
1
(Spare *)
2
Floppy disk controller
3
(Spare *)
DMA2 16 bits
4
Controller 1 cascade connection
5
(Spare)
6
(Spare)
7
(Spare)
Summary of Contents for SR-600
Page 1: ...Confidential Developer s Guide SR 600 Issued date Issued by EPSON English 401333300 ...
Page 2: ...Confidential ...
Page 21: ...Rev A General Features 1 11 Developer s Guide SR 600 Confidential Required Clearance 5cm 5cm ...
Page 22: ...1 12 General Features Rev A Confidential ...
Page 44: ...2 22 OS and Driver Setup Rev A Confidential ...
Page 106: ...5 24 Hardware Specifications Rev A Confidential ...
Page 154: ...6 48 Peripherals Option Installation Rev A Confidential ...
Page 186: ...Appendix 3 8 Wake On LAN Rev A Confidential ...
Page 191: ...Confidential ...
Page 192: ...Confidential EPSON SEIKO EPSON CORPORATION Printed in Japan ...
