Topic : The ATARI Compendium
Author : Scott Sanders / JAY Software
Version : 1.25 (20/6/2003)
Subject : Documentation
Nodes : 1117
Index Size : 32614
HCP-Version : 6
Compiled on : Atari
@charset : UTF-8
@lang : en
@default :
@help : %About
@options : +g -i -t4 +y +z
@width : 100
View Ref-FileACSI DMA and Floppy Disk ControllerLocation(s) SizeBYTE Occupies one byte (8 bits).
WORD Occupies one WORD (16 bits).
LONG Occupies one longword (32 bits).
OW Occupies the odd WORD of a LONG.
EW Occupies the even WORD of a LONG.
OB Occupies the odd BYTE of a WORD.
EB Occupies the even BYTE of the WORD.
MchnIf the box is shaded then address is available
for this computer.
▒ ▒ ▒ ▒ ▒ ▒
| | | | | '------- Falcon030
| | | | '--------- TT030
| | | '----------- MEGA STe
| | '------------- STe
| '--------------- MEGA ST
'----------------- STTypeROM Location is Read-Only Memory
RAM Location is Read-Write Memory
I/O Location is hardware-mapped
VME Location addresses VME address space
N/A Not applicable
RO Read-only location
WO Write-only location
RW Read-write location
RSVD Reserved
Unassigned Either not assigned or undocumented
Meaning (see Usage)
▒▒▒▒▒▒
0x00FF8600 - WORD ▒▒▒▒▒▒ I/O Reserved
0x00FF8602 ▒▒▒▒▒▒
▒▒▒▒▒▒
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0x00FF8604 WORD ▒▒▒▒▒▒ I/O DMA Sector Count (on write) DMA Data
▒▒▒▒▒▒ Register (on read)
▒▒▒▒▒▒
▒▒▒▒▒▒
0x00FF8606 WORD ▒▒▒▒▒▒ I/O DMA Status (on read) as follows:
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▒▒▒▒▒▒ DMA Mode Control (on write) as
▒▒▒▒▒▒ follows:
▒▒▒▒▒▒