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17.03.2002, 16:02 Uhr
Gast
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Hi !
I have one EC1834 at home. I need help with graphics on this machine. I know that the graphic card is compatibile with CGA. CGA modes works. well. But I want work also in modes 640x400 and 640x480. I`ve found driver VE89.SYS in DCP system. The g. modes on the computer are incompatible with another graphic card. I can test card via program VMODE.COM in DCP. All modes works. I have tried to write program in Turbo Pacal for handling these graphic modes. I`m acessing video memory on B800:0000. I have sucessfully tested mode 08h (640x400x2). It`s similar to mode 640x200 on CGA (there are stored even rows and odd rows separately - two 8KB blocks ). I think that rows in mode 640x400 are stored in four 8KB blocks or three 12KB blocks (I`m not sure) but it`s not important for me now. I would like to know something about mode 09h 640x480x?. When I write to memory on B800:0000 like in mode 08h something appears on the screen but I can`t determine the correct memory organisation in this mode.
Could anyone send me this graphic mode specification ?
It should be written in EC 1834 documentation.
Thanks. |
