dempson@actrix.gen.nz (David Empson) wrote in message news:<1f6ijip.1fvjaeq1n7h2kiN%dempson@actrix.gen.nz>... > jalapeno wrote: > > > dempson@actrix.gen.nz (David Empson) wrote: > > > E.-R. Bruecklmeier wrote: > > > > > > > aXis Computers schrieb: > > > > > > > > > I suggest doing a search on DejaNews (or your favourite archive) for > > > past postings on this subject - I've posted all the major details > > > before, as have others. It might have made it into the FAQ for this > > > group (I haven't checked) - if it hasn't, then it should be there, as I > > > think it qualifies as a frequently asked question. > > > > Isn't there a technote on the subject? Yeah, #026 is a Rom revision > > summary. > > But not the subject of discussion here - this technotes covers the > changes between ROM 00 and ROM 01 (which it confusingly calls "ROM 1" > and "ROM 2"). > > Apple didn't publish a technical note explaining the differences between > the original Apple IIgs and the "Apple IIgs with 1 megabyte of RAM" > (a.k.a. "ROM 3"). Sure they did. Matt Deatherage updated note #026 in 1989 so you must have the old version. The link I posted has the revised version. Here is the relevent part: Apple II Technical Notes _____________________________________________________________________________ Developer Technical Support Apple IIGS #26: ROM Revision Summary Revised by: Matt Deatherage September 1989 Written by: Rilla Reynolds October 1987 This Technical Note summarizes revisions to the Apple IIGS ROM. Changes since November 1988: Revised to cover ROM 3. _____________________________________________________________________________ Apple currently supports two configurations of the Apple IIGS ROM, ROM 1 and ROM 3. In August 1989, Apple IIGS computers began shipping with a 256K ROM, referred to as version 3 or ROM 3 (ROM 2 was skipped since there was already enough confusion about the first version, ROM 0, and the second version, ROM 1). System Software continues to support ROM 1, but it no longer supports ROM 0. Authorized Apple dealers can upgrade older systems (i.e., machines with serial numbers lower than E704...) to ROM 1 upon request. ROM 1 requires System Software 2.0 or later, while ROM 3 requires System Software 5.0 or later. Although applications may work using older system software releases, they may not function properly due to the coordination of system software and ROM revisions. Changes from ROM 1 to ROM 3 ROM 3 is 256K (double the size of ROM 1) and contains several tools which do not exist in ROM 1. The patch file TS3 fixes known bugs in ROM 3 which were discovered after it was frozen. ROM 3 tools are basically System Software 5.0 tools, and the System Software 5.0 documentation covers these tools in detail. This Note only documents non-tool changes. AppleDisk 3.5 and SmartPort o Use new routines for all block reads to fast RAM to eliminate double buffering. o The extended DIB status call returns the device subtype byte $C1. o Fixed anomalies described in SmartPort Technical Note #6, Apple IIGS SmartPort Errata. o Fixed a ROM 1 bug that caused Write Protected to be returned with higher priority than Device Offline for the ProDOS STATUS call. AppleTalk o AppleTalk moved to slots 1 and 2 from slot 7. Control Panel CDA o The original Options menu is now the Keyboard menu and does not contain mouse parameters. o A new Mouse menu is present. The new keyboard microcontroller allows finer control of mouse tracking, so a selection procedure better than yes or no is present. Parameters are also available to set the keyboard mouse feature, which allows the numeric keypad to emulate a mouse. o Added an option to resize the RAM disk on the next reset in the RAM Disk menu. This option resets to No after one reboot and resizing so the RAM disk is not accidently reformatted on every boot thereafter. o If slot 7 is set to AppleTalk, the Control Panel displays a warning if neither slot 1 nor slot 2 is similarly set. o The Printer Port and Modem Port menus now display only those parameters that may be changed if AppleTalk is the selection for those ports. o The RAM disk no longer has minimum and maximum settings, but rather one RAM disk size setting. Monitor o Enhanced memory searching commands to automatically cross bank boundaries. o Added Step and Trace debugging functions. o Now provide vectors for the same functionality as the GS/OS System Service calls MEMORY_MOVER, DYN_SLOT_ARBITER and SET_SYS_SPEED in bank $E1. o Now resize the RAM disk when the system is rebooted with the Control-Open Apple-Shift-Reset key combination. o Handle text page 2 shadowing and power-up bits in the new CYA chip. o Flash the border if the sound volume is set to zero and a beep is necessary. o In ROM 1 and earlier, the Miscellaneous Tools mouse firmware called the 8-bit mouse routines in the $C400 space to do the work. In ROM 3, the 8-bit routines call the 16-bit routines to read the hardware. This change effectively means those programs which use 16-bit mouse calls (including desktop applications through the Event Manager) may use the mouse when slot 4 is set to Your Card. o Slots 1 and 2 may now be set to Printer, Modem, AppleTalk, or Your Card. With System Software 5.0, slot 7 does not need to be set to AppleTalk to use an AppleTalk network, although one can do it for compatibility. There is no transparent printing firmware in slot 7. o The Alternate Display Mode CDA no longer sets the system to fast speed when normal speed is selected in the Control Panel. o Added a new command, {val}=V, to set the video screen display I/O switches when resuming a program. o Control-T command now works as a toggle--executing it once changes to text mode, but now executing it again switches back to the previous video mode You may change this saved video mode with the =V command. o Battery RAM value $59 now controls the presence of the Visit Monitor and Memory Peeker CDAs. If this byte has the high bit set at boot time, the CDAs are automatically installed. o The Monitor and Memory Peeker both allow the use of Control-X to terminate a long display (i.e., a handle list or memory dump). Serial I/O o XON and XOFF are no longer sent with the high bit set when buffering is enabled. o Terminal mode cursor is more consistent with the rest of the system. o Extended Interface calls now return errors in the carry and the accumulator. Toolbox The following tools are now in ROM: o Window Manager o Menu Manager o Control Manager o Line Edit o Dialog Manager o Scrap Manager o Font Manager o List Manager Further Reference _____________________________________________________________________________ o Apple IIGS Firmware Reference o Apple IIGS Toolbox Reference o Apple IIGS Technical Note #52, Loading and Special Memory o SmartPort Technical Note #6, Apple IIGS SmartPort Errata