Changes

Snapshot

49 bytes added, 8 September
/* I/O breakpoints */
NOTES:
* 1. The type is a value which represents the I/O port: 0 = user (address and address mask are stored in the file) 1 = gate array 2 = palette register select 3 = palette write 4 = interrupt rom and mode 5 = secondary ram mapping 6 = pal 7 = crtc 8 = crtc register select 9 = crtc register write 10 = crtc register read 11 = crtc status read 12 = upper rom 13 = printer 14 = ppi 15 = ppi port a 16 = ppi port b 17 = ppi port b (tape read) 18 = ?? 19 = ppi port b (vsync) 20 = ppi - port c 21 = ppi - tape write 22 = ppi - tape motor 23 = ppi - keyboard 24 = ppi control 25 = psg 26 = psg register select 27 = psg read 28 = psg write 29 = keyboard
Where type is not 0, the address mask and address are not stored but can be found in Winape's debugger and they may have a built in condition where specific data or i/o configuration is required.
* 2. This byte represents access type and if there is count and condition data stored. Where type is 0, the access bits are set by the user, otherwise they are
set defined by the type and can be seen in the winape debugger.
bit 7,6 = access where bit 7 = write and bit 6 = read. This allows read only, write only and read/write to be specified. bit 5 = unknown. Always set to 1? bit 4 = unknown. Always set to 0? bit 3 = condition data is stored. bit 2 = count data is stored. bit 1 = unknown. bit 0 = unknown.
* 3. the condition is a string of ascii characters. This value is the number of characters/bytes.* 4. there is 1 byte per character in the condition. The condition string is not null terminated.
== DARS ==
2,562
edits