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- 6502Em: The ROMs
- ================
-
- 6502Em will not run without at least one set of ROMs.
- The following versions of the OS are supported:
-
- OS 1.2
- ------
-
- This was the final release of the OS for the BBC Model B
- files needed:
- !6502Em.ROMs.OS1,2 The Operating System itself
- !6502Em.ROMs.BASICII The BBC BASIC interpreter
-
- OS 3.2
- ------
-
- This was the first release (of two) of the OS for the BBC Master
- files needed:
- !6502Em.ROMs.M128.OS3,2 The Operating System itself
- !6502Em.ROMs.M128.Terminal Terminal 1.20 ROM, plus more OS
- !6502Em.ROMs.M128.View View 3.0 ROM, plus a little OS
- (!6502Em.ROMs.M128.ADFS1,50 ADFS, not currently loaded by emulator)
- !6502Em.ROMs.M128.BASICIV84 The BBC BASIC interpreter
- !6502Em.ROMs.M128.Edit1,00 Edit ROM (
- !6502Em.ROMs.M128.ViewSheet Viewsheet 1.0 ROM
- !6502Em.ROMs.M128.DFS2,24 DFS ROM - provides *SRLOAD etc
-
- OS 3.5
- ------
-
- This was the second release (of two) of the OS for the BBC Master
- files needed:
- !6502Em.ROMs.M128.OS3,5 The Operating System itself
- !6502Em.ROMs.M128.Terminal35 Terminal 1.20 ROM, plus more OS
- !6502Em.ROMs.M128.ViewB3,3 View 3.3 ROM
- (!6502Em.ROMs.M128.ADFS2,03 ADFS, not currently loaded by emulator)
- !6502Em.ROMs.M128.BASIC4r32 The BBC BASIC interpreter
- !6502Em.ROMs.M128.Edit1,50r Edit ROM
- !6502Em.ROMs.M128.ViewSh1,01 Viewsheet 1.01 ROM
- !6502Em.ROMs.M128.DFS2,45 DFS ROM, plus a little OS
-
- Some of the changes from 3.2:
- Startup message is "ACORN MOS" not "Acorn MOS"
- Sideways ROMs can now be automatically relocated over the tube (BASIC, Edit)
- Sideways RAM Utilities now in kernel
- ADFS *Format, *Verify and *Backup now in ROM (decoded by MOS)
- CLOSE#0 and EXT#= now work under DFS
- Larger range of step values available (*CONFIGURE FDRIVE)
- Support for international characters in filing system names
- Area move, ellipse and sound code is now in DFS ROM
- A few extra CMOS options
- The ROM between &FC00 AND &FF00 now contains code
-
- OS 5.1
- ------
-
- This was the only release of the OS for the Master Compact
- files needed:
- !6502Em.ROMs.Compact.OS5,1 The Operating System itself
- !6502Em.ROMs.Compact.Utils OS * Commands (including *SRLOAD)
- !6502Em.ROMs.Compact.BASICIV86 The BBC BASIC interpreter
- (!6502Em.ROMs.Compact.ADFS2,10 ADFS, not currently loaded by emulator)
-
- OS 1.0
- ------
-
- This was the only release of the OS for the Acorn Electron
- files needed:
- !6502Em.ROMs.Electron The Operating System itself
- !6502Em.ROMs.BASICII The BBC BASIC interpreter
-
- Historical Note
- ===============
-
- OS 2.x was for the BBC B+
- OS 3.5 was the second release for the Master 128
- OS 4.x was for the Master ET (Econet Terminal)
-
- Previous releases for the original BBC were 0.10 and 1.00
- The Electron's OS was, confusingly, also 1.00