Monochrome Graphics  (250-3049A)    Settings           Faxback Doc. # 2121
Parallel Adapter

This adapter is used when installing a VM-5 to a CPU.

The 250-3049A has three staking pins and they are described as parallel 
port LPT1 enable or disable.

When installing this board in a 3000, 3000HD or 4000, there will probably 
still be a 250-4034 Serial/Parallel Adapter board. The parallel port on the 
250-4034 will probably be configured as LPT1.

The new 250-3049A LPT1 address is 03BCh and 250-4034 LPT1 is using the old 
LPT1 address of 0378h. There is no need to change the 250-4034 board. The 
computer will not look at the LPT assignments, simply addresses. The computer 
will see the 250-3049A as LPT1 and even though the 250-4034 looks as if it 
is using LPT1, the address it is using will cause the computer to see it as 
LPT2.

To summarize, when using a combination of the 250-3049A and the 250-4034, this 
is how the computer see's it:

Board:        Configured As:      Address:       CPU See's It As:

25-3049A      LPT1                03BCh          LPT1

25-4034       LPT1                0378h          LPT2

(smm/jej-05/11/94)