ladanyi@cs.cornell.edu (La'szlo' Lada'nyi) (04/12/91)
I just bought an IBM/AT clone with a Paradise VGA card. (I beleive it is PVGA-16.) The card clearly has the maximum 512K (I see the chips), but all of my program says, that it has only 256K. I checked that the jumper, which selects the memory size, is setted correctly, so now I don't know what's the problem. I have the suspicion that the video memory start address is setted incorrectly. Norton 5.0 Sysinfo says that it starts at 0xB800, however the card's manual says it should start at 0xA000. Is this really a possible problem? If yes, how can I change it in the CMOS? I have AMI BIOS '89, but the setup system doesn't support the change of the video memory start address. Is there any program which can do this? If not, what do you think, what can be the problem? I hope somebody can answer my question. Thanks in advance. - Laci ----------------------------------------------------------------------- | Laci Ladanyi | "Not only is this incomprehensible, but | | ladanyi@cs.cornell.edu | the ink is ugly and the paper is from | | ladanyi@orie.cornell.edu | the wrong kind of tree." -Profesoor W. | -----------------------------------------------------------------------
jdb@reef.cis.ufl.edu (Brian K. W. Hook) (04/12/91)
In article <1991Apr12.160629.2075@cs.cornell.edu> ladanyi@cs.cornell.edu (La'szlo' Lada'nyi) writes: |>I just bought an IBM/AT clone with a Paradise VGA card. (I beleive |>it is PVGA-16.) The card clearly has the maximum 512K (I see the |>chips), but all of my program says, that it has only 256K. I As far as I know, if you have a VGA card most sysinfo programs (such as SI) will tell you that you have 256K since they check the same low memory area in the BIOS area. |>I have the suspicion that the video memory start address is |>setted incorrectly. Norton 5.0 Sysinfo says that it starts at |>0xB800, however the card's manual says it should start at 0xA000. |>Is this really a possible problem? No, this isn't a problem. The start of your video address depends on your mode. A000 is the start in graphics mode (EGA and VGA) and B800 is the start of text mode (at least color text) and CGA graphics. The card should doa Hercules emulation or an MDA emulation, and that will have a start of B000. |>I hope somebody can answer my question. The best thing to do to test the card is run one of the diags that should've come with the card. I think that it should be called RESTEST.EXE. Also, there is a program called VDIAGS that might work. If your card can do 1024x768x16 or higher, or do 640x480x256 or higher, then you have 512K. Brian