6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-26 08:49:37 +00:00
Code Issues Projects Releases Wiki Activity

Corrected: ALTZP is what affects the language card areas'

Thomas Harte 2018-07-30 15:46:55 -04:00
parent 68d45371b3
commit 112e2c813b
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Apple-IIe-Memory-Paging.md

@ -27,9 +27,9 @@ Contains ROM if `RDCXROM` is set. Otherwise is unmapped, allowing cards to respo
Contains ROM if `RDCXROM` is set or `INTC3ROM` is reset. Otherwise is unmapped, allowing card 3 to respond. Contains ROM if `RDCXROM` is set or `INTC3ROM` is reset. Otherwise is unmapped, allowing card 3 to respond.
# D000–E000 # D000–E000
Reading: contains ROM if the language card `read` flip flop is *disabled*. Contains base RAM if the flip flop is enabled and `RAMRD` is reset. Otherwise contains auxiliary RAM. Reading: contains ROM if the language card `read` flip flop is *disabled*. Contains base RAM if the flip flop is enabled and `ALTZP` is reset. Otherwise contains auxiliary RAM.
Writing: empty if the language card `write` flip flop is *enabled*. Contains base RAM if the flip flop is disabled and `RAMWRT` is reset. Otherwise contains auxiliary RAM. Writing: empty if the language card `write` flip flop is *enabled*. Contains base RAM if the flip flop is disabled and `ALTZP` is reset. Otherwise contains auxiliary RAM.
The portion of RAM accessed depends upon the language card's `BANK2` flip flop. The portion of RAM accessed depends upon the language card's `BANK2` flip flop.