2600 in 2006 - 4A50 support for Z26--real soon now

[RSS Bot]

I've managed to patch version 2.13 of Z26 to support 4A50 bank switching. I've sent the code to Eckhard for his approval; if he likes it, I should be able to release it. It auto-assumes that a 64K or 128K file is 4A50 format, and includes bank-switches in the log file. For example (left columns elided)

CODE

nvbdIZC 8c 11 00 f1 b8a6: 0c 44 6e nop 6e44 (*BANKS 22000/1E000/1C100*)

nvbdIZC 8c 11 00 f1 b8a9: 4c 89 b7 jmp b789

nvbdIZC 8c 11 00 f1 b789: 85 02 sta WSYNC

nvbdIZC 8c 11 00 f1 b78b: 85 02 sta WSYNC

nvbdIZC 8c 11 00 f1 b78d: 04 fb nop fb (*BANKS 22000/19800/1C100*)

 

The first number in the BANKS message is the base address for the range $1000-$17FF

The second number is the base address for the range $1800-$1DFF

The third number is the base address for the range $1E00-$1EFF

The range $1F00-$1FFF is always at base address $1FF00

 

Note that addresses $00000-$1FFFF are ROM; $20000-$27FFF are RAM.

 

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