
Apple II Computer Info
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### FILE : a2.hw
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### Created : Sunday, January 14, 1996 Modified: Sunday, January 14, 1996
### File Type: "TEXT" File Creator: "LMAN"
### File Size: 9016 bytes 8 KB
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Path:
news.weeg.uiowa.edu!news.uiowa.edu!hobbes.physics.uiowa.edu!moe.ksu.ksu.edu!ux1.cs
o.uiuc.edu!newsrelay.iastate.edu!iscsvax.uni.edu!thompsa1597
Newsgroups: comp.sys.apple2
Subject: Re: Language Card access -- do $C08x switches work on IIGS?
Date: 7 Jun 93 00:43:28 -0600
Organization: University of Northern Iowa
Lines: 225
Fire up your copy buffers. This should answer your question about the
soft switches. Four pages of goodies no Appler should be without:
SOFT SWITCHES
+--------+---------------+---------+---------+-----+
| ACTION | ADDRESS | READ | WRITE? | $D0 |
+--------+---------------+---------+---------+-----+
| R | $C080 / 49280 | RAM | NO | 2 |
| RR | $C081 / 49281 | ROM | YES | 2 |
|de R | $C082 / 49282 | ROM | NO | 2 |
| RR | $C083 / 49283 | RAM | YES | 2 |
| R | $C088 / 49288 | RAM | NO | 1 |
| RR | $C089 / 49289 | ROM | YES | 1 |
| R | $C08A / 49290 | ROM | NO | 1 |
| RR | $C08B / 49291 | RAM | YES | 1 |
+--------+---------------+---------+---------+-----+
|de W | $C008 / 49160 | MAIN ZPAGE,STACK,LC |
| W | $C009 / 49161 | AUX. ZPAGE,STACK,LC |
+--------+---------------+-------------------------+
| R7 | $C011 / 49169 | $D0 BANK 2(1) OR 1(0) |
| R7 | $C012 / 49170 | READ RAM(1) OR ROM(0) |
| R7 | $C016 / 49174 | USE AUX(1) OR MAIN(0) |
+--------+---------------+-------------------------+
|de W | $C002 / 49154 | READ FROM MAIN 48K |
| W | $C003 / 49155 | READ FROM AUX. 48K |
|de W | $C004 / 49156 | WRITE TO MAIN 48K |
| W | $C005 / 49157 | WRITE TO AUX. 48K |
| R7 | $C013 / 49171 | RDG MN (0) OR AX (1) |
| R7 | $C014 / 49172 | WRT MN (0) OR AX (1) |
+--------+---------------+-------------------------+
|de W | $C000 / 49152 | RD/WR MAIN $40-5F |
| W | $C001 / 49153 | RD/WR AUX. $40.5F |
| R | $C054 / 49236 | VIEW PG 1 |
| R | $C055 / 49237 | VIEW PG 2 |
| R | $C056 / 49238 | VIEW TEXT & LO-RES |
| R | $C057 / 49239 | VIEW HI-RES |
+--------+---------------+-------------------------+
Apple II Computer Technical Information : Apple II Family Hardware Info
ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 4 of 572
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