Apple IIGS features of ProDOS 2.4
- Preserves GS/OS dormant state – Now multiple ProDOS games or programs can be booted and still return to GS/OS.
- New ʽBitsy Bootʼ utility allows programs to quit to the 8-bit launcher or return to the 16-bit GS/OS Finder.
- New ʽBitsy Byeʼ program launcher is built into ProDOS 2.4 and allows users to run SYS, S16, BIN, BAS, and TXT files.
- ProDOS 2.4 includes both the 6502 compatibility of ProDOS 1.x and the slot remapping functionality of ProDOS 2.x. Now Apple II programs can use a single version of ProDOS to boot any Apple II and access all storage volumes.
- When run from the Finder, the Solid-Apple key selects whether ProDOS 2.4 will Quit to Bitsy Bye or the Finder.
- ProDOS 2.4 is smaller than ProDOS 2.0.3 and loads faster.
- The ProDOS 2.4 interrupt manager reduces latency and memory-use, resulting in faster, consistent interrupt response.
Apple II features of ProDOS 2.4
- For the first time, the features and improvements of ProDOS 2.x are available on 6502-based Apple ][, Apple ][+, and un-enhanced Apple //e computers.
- All Apple II computers with modern USB storage devices or hard drives can now support up to 14 ProDOS volumes per device.
- Unlike earlier versions of Basic.System which hang on Integer ROM Apple ][ computers. The new Basic.System 1.6 reports that ProDOS Basic requires an Apple ][+ and then quits back to the Bitsy Bye program launcher.
- ProDOS splash screen date of 16-8-16 because Woz.
Bitsy Bye program launcher
ProDOS 2.4 includes a new program launcher with many features and improvements over earlier versions of ProDOS:
- Runs on all Apple II computers and CPUs: 6502, 65c02 or 65816.
- Allows drives to be selected directly by slot using number keys 1-7.
- Allows files to be selected by typing the first letter of their filename.
- Displays and quickly scrolls through up to 2,733 files per directory.
- Displays and allows selection of all files on a drive, not just System files and directories like previous launchers.
- Displays file types and allows launching Applesoft Basic, Binary, Text exec, and GS/OS S16 files via Basic.System.
- Displays the slot and drive of each device.
- Does not abort on drive errors, but instead lists and allows launching of all readable files.
- The code and data size for Bitsy Bye is less than 1KB, with room to spare (thanks qkumba).
Bitsy Boot utility
Bitsy Boot is a small system program which allows quick and easy booting of Apple II devices in various slots:
- Displays all slots which contain active ProDOS devices.
- Allows one-press booting of slots 1-7.
- The most recently-used ProDOS device can be booted using Return or Space.
- If GS/OS was previously booted and is dormant, Open-Apple-Q or Open-Apple-Escape will quit back to GS/OS.
- Bitsy Boot takes only 1 block on disk. Code and data are under 400 bytes.
Utilities
The 140k 5.25″ disk image of ProDOS 2.4 disk also includes these useful utilities:
- New MiniBas by Usotsuki – Great for compilation disks, this tiny program can be used instead of Basic.System:
- Requires only 1 block on disk vs 21 blocks for Basic.System
- Loads and runs Binary and Basic programs launched by Bitsy Bye.
- Provides two commands:&”Filename” runs a Binary or Basic program.
- & by itself will quit back to ProDOS.
[*]Disk Imaging Programs – ADT Pro and FastDsk allow migrating data from floppy disks to modern computers.
[*]Disk Utilities – Verify and repair disks. View and edit disk blocks.
[*]File Utilities – Manage ProDOS and DOS 3.3 files and disks on any Apple II, including Integer ROM Apple ][.
[*]Shrinkit archive expander – Access Apple II Shrinkit archives commonly found on the internet.
@JBrooksBSI
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