5150/5151 Video Card??
cisin at xenosoft.com
Mon Aug 15 11:25:32 CDT 2016
On Mon, 15 Aug 2016, Alexandre Souza wrote:
> This is a CGA clone.
> It can work with CGA [monitors]
> and Hercules monitors/modes, and
connecting a "hercules" monitor, such as a 5151 to CGA can damage the
> usually were switched by a program called MONO.COM.
MOV AX, 0002h ; Set mode to CGA B&W
MOV AX, 003h ; Set mode to CGA color
MOV AX, 0007h ; Set mode to MDA
They can be shortened a byte by using INT 3, instead of INT 20h, or
lengthened with MOV AX 4C00h Int 21h. But, since each program is going
to occupy a 512 byte sector, the difference won't matter.
or using MODE.COM:
> I Believe I have some boards like that. Possibly I have the manual and
Does THIS particular board handle BOTH CGA and MDA frequencies?
If not, telling him to connect his 5151 or "hercules" monitor, is going to
cost him a monitor.
If so, telling him to connect his 5151 or "hercules" monitor without the
right switch settings, is going to cost him a monitor.
5151 and "hercules" (MDA) monitors do not like wrong frequencies.
SERIOUSLY: connecting a 5151 or "hercules" monitor to the wrong signals
can damage it.
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