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started a simple manual
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Dagen Brock
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doc/gsplusmanual.pdf
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gsplus
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gsp_icon_128.png
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Modern cross-platform Apple IIgs emulator and tools based on KEGS
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Manual Version: Initial Draft
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Date: 2016-05-01
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Overview & Purpose
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This is an early release of an experimental project to modernize the KEGS/GSport emulator platform and eventually extend it.
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The first steps are represented here. This release features a new SDL2 driver. SDL or "Simple DirectMedia Layer" enables the writing of one cross-platform driver to handle input and output (video, mouse, keyboard, audio, joystick). The hope is that I can leverage the multi-platform nature of SDL to provide first-class support for the major platforms supported by SDL, which includes Mac OSX, Windows and Linux.
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Currently, five builds are being supported:
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* OSX (SDL2 driver)
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* Ubuntu (SDL2 driver)
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* Ubuntu (SDL driver)
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* Ubuntu (X11 driver)
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* Window (Win32 driver)
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There are more platforms still in the codebase, and some, like Raspberry Pi will probably be added to official support. But I may drop some of the older platforms like OS/2.
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________________
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Getting started
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1. Download the emulator and put it in a folder
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2. Download the Apple IIgs Firmware ROMs, for either a ROM01 or ROM03 machine. (If you have a real IIgs, there are ways to save it from your machine as well.)
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3. Download some Apple IIgs software. (I recommend the excellent Apple IIgs dedicated site, http://www.whatisthe2gs.apple2.org.za/ )
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(If you have a real IIgs, you can transfer your disks using ADTPro http://adtpro.sourceforge.net/ )
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4. Edit your config:
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1. By hand… edit the config file (config.txt, config.gsplus, or .gsplus)
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2. While the emulator is running… hit F4 to enter config menu.
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1. Boot the Apple IIgs by running the emulator
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1. Windows: gsplus.exe
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2. Mac/Ubuntu: ./gsplus
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Emulator Hot-Keys
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There are several keys used to interact with the emulator while it is running. Here’s a quick list of the main hot-keys and what they do.
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F4 - Configuration menu
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F5 - Config menu
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F6 - Toggle System Speed (1, 2.8, 8, ∞ MHz )
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F7 - Toggle Fast Disk Emulation
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F9 - Invert Paddles
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F10 - Toggle a2vid_palette (?)
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F11 - Toggle Fullscreen Mode
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F12 - RESET Key (i.e. - “Ctrl-F12” = “Ctrl-Reset” on an Apple II)
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Other Input/Output
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1. Mouse and keyboard should automatically work
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2. Joystick with SDL2 driver is known to be working. The axes and buttons are not yet configurable. Better info forthcoming.
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3. There are drivers for serial controller, ImageWriter (II?) printer, and networking. I’m not currently familiar with the state of these drivers or their usage. More info will be added as I take time to research more of the modules.
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Configuration Menu
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Enter the configuration menu at any time while running gsport by hitting <F4>.
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The configuration options are loaded from, and saved to, a configuration text file. The file can be named one of the following: config.txt, config.gsplus, or .gsplus.
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If you are just starting out, it’s recommended to use the configuration menu versus editing the file yourself.
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Screen Shot 2016-05-01 at 9.10.00 AM.png
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Most important, you can use the Disk Configuration menu option to “mount” and “eject” disks.
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Debugger Commands
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Enter from the debugger prompt (Shift-F6)
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GSport Debugger help (courtesy Fredric Devernay)
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General command syntax: [bank]/[address][command]
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e.g. 'e1/0010B' to set a breakpoint at the interrupt jump pt
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Enter all addresses using lower-case. As with the IIgs monitor, you can omit the bank number after having set it: 'e1/0010B' followed by '14B' will set breakpoints at e1/0010 and e1/0014
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g Go
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[bank]/[addr]g Go from [bank]/[address]
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s Step one instruction
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[bank]/[addr]s Step one instr at [bank]/[address]
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[bank]/[addr]B Set breakpoint at [bank]/[address]
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B Show all breakpoints
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[bank]/[addr]D Delete breakpoint at [bank]/[address]
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[bank]/[addr1].[addr2] View memory
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[bank]/[addr]L Disassemble memory
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P Dump the trace to 'pc_log_out'
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Z Dump SCC state
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I Dump IWM state
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[drive].[track]I Dump IWM state
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E Dump Ensoniq state
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[osc]E Dump oscillator [osc] state
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R Dump dtime array and events
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T Show toolbox log
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[bank]/[addr]T Dump tools using ptr [bank]/[addr] as 'tool_set_info'
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[mode]V XOR verbose with 1=DISK, 2=IRQ,4=CLK,8=SHADOW,10=IWM,20=DOC,
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40=ABD,80=SCC, 100=TEST, 200=VIDEO
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[mode]H XOR halt_on with 1=SCAN_INT,2=IRQ, 4=SHADOW_REG, 8=C70D_WRITES
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r Reset
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[0/1]=m Changes m bit for l listings
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[0/1]=x Changes x bit for l listings
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[t]=z Stops at absolute time t (obsolete)
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S show_bankptr_bank0 & smartport errs
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P show_pmhz
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A show_a2_line_stuff show_adb_log
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Ctrl-e Dump registers
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[bank]/[addr1].[addr2]us[file] Save mem area to [file]
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[bank]/[addr1].[addr2]ul[file] Load mem area from [file]
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v Show video information
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q Exit Debugger (and GSport)
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________________
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Project Info
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Developers inquire within :P
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Main page and full source code repository: https://github.com/digarok/gsplus
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This project has an ugly unmaintained homepaged at http://apple2.gs/plus/
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