Articles by Apple II Online Reference

The IIgs has two memory clocks: the processor (65816) bus, which connects to the Fast RAM, and the Mega II (Apple II-compatible) bus, which connects to the Slow RAM and peripherals.
The 816 bus clock is identified by the symbol ?2 and the M2 bus clock is identified by ?0.

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Sweet Microsystems Mockingboard

1991 was proclaimed the “Year of the PC soundcard” by Sierra On-Line (Sierra), Ad-Lib and Creative duke it out to get the first one out the door, Creative ‘wins’ with the Sound Blaster Pro.
Well, as if this were the biggest thing to ever happen

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From: tdiaz-a(in_a_circle)-apple2-dotsero-org (Tony Diaz)
Newsgroups: comp.sys.apple2,comp.answers,news.answers
Approved: news-answers-request@MIT.EDU
Followup-To: comp.sys.apple2
Subject: comp.sys.apple2 Apple II System Monitor CMD Reference
Archive-name: apple2/faq/sysmon
Posting-Frequency: monthly
Last-modified: October 11 2007
Version: 0.54
URL: http://apple2.info/wiki/index.php?title=System_Monitor
The next section is the Frequently Asked Questions (FAQ) posting of the comp.sys.apple2 newsgroup. Copyright (c) 2007 by Tony Diaz

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Page 182

Index Index A A register … 96 access … 150, 153, 157 byte … 13 accumulator … 29, 77, 85 Active Entries … 158 ALLOC_INTERRUPT call … 35, 170, 111, 178 alternate 64K RAM bank … 89 APPEND command … 131 Apple II … xvi, …

Appendix D – The ProDOS Machine Language Exerciser

Page 179
The ProDOS Exerciser program is a menu-driven program that allows
you to practice calls to the ProDOS Machine Language Interface
without writing a system program. It is useful for learning how the
various ProDOS MLI calls work. Using

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Appendix C – ProDOS, the Apple III, and SOS

Page 175
This appendix explains the relationships between ProDOS, the
Apple III, and SOS. It should be helpful to those already familiar with
SOS and to those thinking about developing assembly-language
programs concurrently for SOS and ProDOS.

ProDOS, …

Apple Internal Diagnostic Routines Apple IIgs

The Apple IIgs has a fairly extensive inbuilt diagnostic program that is easily accessed at power up by holding the Open-Apple & Option keys when turning on the power, or at any time when pressing Control – Open-Apple – Option – Reset.

#Name$Location

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*************************************************************************** * * * Apple ][ Emulator Resources Guide * * version 1.3.7 * * * * (c) 1995-1998 Alex Maddison * * <alexm@zip.com.au> * * * * Corrections and constructive criticism welcome. * * * * Last updated: April 1998 * * * * Newsgroups: comp.emulators.apple2, alt.emulators.ibmpc.apple2, *.answers* * …