jepler/c64ref
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Compare commits

merge into: jepler:master
Branches Tags
jepler:master
jepler:trivial-typos
jepler:kernal
jepler:memmap
...
pull from: jepler:trivial-typos
Branches Tags
jepler:trivial-typos
jepler:kernal
jepler:master
jepler:memmap

1 commit
master ... trivial-ty

Author SHA1 Message Date
Jeff Epler
3681e8f424 fix 2 trivial typos 2020-05-16 17:31:29 -05:00
1 changed files with 2 additions and 2 deletions
Show stats Expand all files Collapse all files

4
c64mem/c64mem_mapc64.txt
View file

@ -214,7 +214,7 @@ $0001 R6510 6510 On-Chip I/O Port
When cartridge ROM is selected to replace the Kernal, a Max emulator When cartridge ROM is selected to replace the Kernal, a Max emulator
mode is entered, which mimics the specification of the ill-fated Max mode is entered, which mimics the specification of the ill-fated Max
Machine, a game machine which Commodore never produced for sale int he Machine, a game machine which Commodore never produced for sale in the
U.S. In this mode, only the first 6K of RAM are used, there is no U.S. In this mode, only the first 6K of RAM are used, there is no
access to the character ROM, and graphics data such as charactger access to the character ROM, and graphics data such as charactger
dot-data is mapped down from 57344 ($E000) to 8192 ($2000). Further dot-data is mapped down from 57344 ($E000) to 8192 ($2000). Further
@ -3054,7 +3054,7 @@ $030C-$030F Register Storage Area
You can also use these locations to help you take advantage of Kernal You can also use these locations to help you take advantage of Kernal
routines that return information in the register. For example, the routines that return information in the register. For example, the
SCREEN routine (58629,$E505) returns the number of screen rows int he SCREEN routine (58629,$E505) returns the number of screen rows in the
.Y register, and the number of columns in the .X register. Using this .Y register, and the number of columns in the .X register. Using this
routine, a BASIC program could be written to run on machines with routine, a BASIC program could be written to run on machines with
different screen formats (for example, the 64 and the VIC-20). Just different screen formats (for example, the 64 and the VIC-20). Just