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pcat_dyn: notes (nw)

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cracyc 2016-03-06 11:57:53 -06:00
parent 18b52a5808
commit 0ece3b9ca5
1 changed files with 4 additions and 14 deletions
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src/mame/drivers/pcat_dyn.cpp
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@ -9,23 +9,13 @@ Unmodified 486 PC-AT HW. Input uses a trackball device that isn't PC standard af
Jet Way Information Co. OP495SLC motherboard
- AMD Am486-DX40 CPU
- Trident TVGA9000i video card
- Breve Technologies audio adapter
preliminary driver by Angelo Salese
TODO:
- Returns CMOS checksum error, can't enter into BIOS setup screens to set that up ... it's certainly a MESS-to-MAME
conversion bug or a keyboard device issue, since it works fine in MESS. (Update: it's the keyboard device)
keyboard trick;
- Set 0x41c to zero then set the scancode accordingly:
- bp f1699 ah = 0x3b
- bp f53b9 al = scancode
- bp f08d9 ah = scancode
0x48 is up 0x4d is down 0x50 is right 0x4b is left
0x3c/0x3d is pageup/pagedown
0x01 is esc
0x0d is enter
Notes:
Data from the 99378275.SN file on the rom filesystem is scrambled and written to DF80:0000-0100 then read back.
If the output isn't satisfactory, it prints "I/O BOARD FAILURE".
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