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In article <131@netxcom.UUCP> jallen@netxcom.UUCP (John Allen) writes:
>
>I'm looking for anyone with experience using an EGA in 43 line mode.
>We are using a Quadram QuadEGA+, and the IBM technical reference, and
>after calling the BIOS in the manner specified by IBM, we see:
>
>    o   The 8 by 8 character set loads fine.
>    o   The display *appears* to be in 43 line mode (line 24~= 2/3 down)
>    o   When we scroll down to line 24, the display does not scroll up.
>    o   We cannot move the cursor to any line below 24.
>    o   Examination of absolute location 0:484 (rows) shows 0x2B (43 lines).
>
>My question is this:  Is it us, Quadram, or both?  We have called Quadram,
>and they say, "The QuadEGA is 100% compatible .... Lotus runs fine in 43
>row mode .... we can't provide that type of support (BIOS discussion)".
>In short, Quadram technical support is useless.
>
>Any help, phone, net or email, would be greatly appreciated.

I have a QuadEGA+, and it works fine in 43 line mode.  I have have tried
it with nansi.sys, as well as with the following program from PC Magazine.

The following is a debug script that puts an EGA into 43 line mode.

N EGA43.COM
MOV   AX,1112	;Load 8x8 font
MOV   BL,00
INT   10
SUB   AX,AX
MOV   DS,AX
PUSH  [0487]	;Save INFO byte
OR    BYTE PTR [0487],01
MOV   CX,0600	;Set cursor size
MOV   AH,01
INT   10
POP   [0487]	;Restore INFO byte
MOV   DX,03B4	;Fix up underline
MOV   AX,0714
OUT   DX,AX
INT   20

R CX
28
W
Q

Perhaps you might want to compare this to the info given in the IBM tech
manual.

-- 

Ben Broder
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