* Sources from - http://www.easy68k.com/paulrsm/6502/ - http://www.classiccmp.org/cini/pdf/Apple/ * Memory map of the Apple II ROMs http://www.easy68k.com/paulrsm/6502/MEMMAP.HTM | $F800-$FFFF | Monitor. Handles screen I/O and keyboard input. Also has a | | monitor.asm | disassembler, memory dump, memory move, memory compare, step and trace | | | functions, lo-res graphics routines, multiply and divide routines, and | | | more. This monitor has the cleanest code of all the Apple II | | | monitors. Every one after this had to patch the monitor to add | | | functions while still remaining (mostly) compatible. Complete source | | | code is in the manual. | | | | | $F689-F7FC | Sweet-16 interpreter. Sweet-16 code has been benchmarked to be about | | sweet16.asm | half the size of pure 6502 code but 5-8 times slower. The renumber | | | routine in the Programmer's Aid #1 is written in Sweet-16, where small | | | size was much more important than speed. Complete source code is in | | | the manual. | | | | | $F500-F63C | Mini-assembler. This lets you type in assembly code, one line at a | | $F666-F668 | time, and it will assemble the proper bytes. No labels or equates are | | miniasm.asm | supported--it is a MINI assembler. Complete source code is in the | | | manual. | | | | | $F425-F4FB | Floating point routines. Woz's first plans for his 6502 BASIC included | | $F63D-F65D | floating point, but he abandoned them when he realized he could finish | | fp.asm | faster by going integer only. He put these routines in the ROMs but | | | they are not called from anywhere. Complete source code is in the | | | manual. | | | | | $E000-F424 | Integer BASIC by Woz (Steve Wozniak, creator of the Apple II). "That | | intbasic.asm | BASIC, which we shipped with the first Apple II's, was never | | | assembled--ever. There was one handwritten copy, all handwritten, all | | | hand assembled." Woz, October 1984. | | | | | $D800-DFFF | Empty ROM socket. There was at least one third party ROM add-on. | | | | | $D000-D7FF | Programmer's Aid #1--missing from the original Apple II, this is a ROM | | | add-on Apple sold that contains Integer BASIC utilities such as | | | high-resolution graphics support, renumber, append, tape verify, | | | music, and a RAM test. Complete source code is in the manual. | * Misc DOS listing info: http://www.digibarn.com/collections/business-docs/apple-II-DOS/index.html Edasm docs ftp://ftp.apple.asimov.net/pub/apple_II/documentation/programming/6502assembly/Apple%206502%20Assembler-Editor.pdf Apple II Original ROM Information http://www.downloads.reactivemicro.com/Public/Users/David_Craig/Apple2OriginalROMInfo.TXT