If you have the manual for the Intel Above Board/AT, I would really appreciate a copy of the switch settings.
I have this board in my AT, but sadly without documentation so I have no idea how to set it up properly...
From "Shortcuts to Installing the ABOVE_BOARD/AT (for DOS experts)" supplement manual...
Adding RAM Chips
The Above Board/AT uses 64K chips, 256K chips, or a mix of the two. You can mix the two kinds of chips only if you're using the Above Board to add conventional memory.
Buy chips that operate at 150ns or faster. (You can mix chips of different speeds.)
Start filling the column nearest the metal board retainer. Once it's full, move the the next column and fill it. You MUST fill columns in pairs. Never leave a partially filled column or an odd number of filled columns.
Setting switches in Left Switch Block...
Left Switch Block
1=up-position=on
Switches 1-4: Ending Address for This Board's Extended Memory
Switches 5-8: Starting Address for This Board's Extended Memory
Note: These settings must match location of the chips mounted in columns on memory board. My settings after I added memory chips:
0111-1101 [Total 4MB, starting at 1.0MB memory bank]
0000-0000 [No Extended Memory - all expanded](most common setting)
1100-1101 [Ending 1.5MB-Starting 1.0MB]
1011-1100 [Ending 2.0MB-Starting 1.5MB]
1010-1011 [Ending 2.5MB-Starting 2.0MB]
1001-1010 [Ending 3.0MB-Starting 2.5MB]
1000-1001 [Ending 3.5MB-Starting 2.0MB]
0111-1000 [Ending 4.0MB-Starting 3.5MB]
0110-0111 [Ending 4.5MB-Starting 4.0MB]
0101-0110 [Ending 5.0MB-Starting 4.5MB]
0100-0101 [Ending 5.5MB-Starting 5.0MB]
0011-0100 [Ending 6.0MB-Starting 5.5MB]
0010-0011 [Ending 6.5MB-Starting 6.0MB]
0001-0010 [Ending 7.0MB-Starting 6.5MB]
0000-0001 [Ending 7.5MB-Starting 7.0MB]
Note: Examine Jumper Switch settings between Starting and Ending addresses for the same x.xMB (look at previous row). The Jumper Switch setting are the same.
Setting switches in Right Switch Block...
Right Switch Block
1=up-position=on
My settings:
1011-1010
Switch 1-1: Memory Chips
0 [64KB]
1 [256KB]
1 [both 64KB and 256KB]
Switch 2-2:
Not Used
Switches 3-4: Conventional Memory
00 [None]
11 [512KB-640KB](most common setting]
Switches 5-8: Expanded Memory I/O Address For This Board
1010 [258-259h](most common setting)
1001 [268-269h]
1111 [208-209h]
1110 [218-219h]
0101 [2A8-2A9h]
0100 [2B8-2B9h]
0001 [2E8-2E9h]
These optional settings to be used when receiving Message 403 after installing additional Above Board(s).
Running computer's setup program...
Note: Typically the setup program is found on Diagnostics diskette.
I changed my base memory to 640KB
I changed my expansion memory (really extended memory) to 3072KB
Installing the Above Board software...
Since I only wanted extended memory for my database software (Paradox 3.5), I added...
device=c:\dos\himem.sys
If I wished to use expanded memory (or RAM Disk in expanded memory), then...
device=c:\intel\emm.sys M5 I5
The Mx parameter set the address of the 64KB segment to which expanded memory is mapped. Most common setting is address at the bottom of list.
1 [C0000]
2 [C4000]
3 [C8000]
4 [CC000]
5 [D0000]
The Ix parameter determines which I/O addresses Above Board use to access expanded memory. Be sure that this paramenter matches the I/O addresses on Jumper Switches on the Right Switch Block. Use multiple Ix parameters when using multiple additional Above Boards.
0 [208-20F]
1 [218-21F]
5 [258-25F]
6 [268-26F]
A [2A8-2AF]
B [2B8-2BF]
E [2E8-2EF]
If I wished to create a RAM drive (additional D:, E:, F:, etc.) using 360KB of conventional memory... (seldom used)
device=c:\intel\quikmem1.sys 360
Parameter must be greater or equal 4
Parameter must be less or equal 360 (1.0MB less 640MB in conventional reserved for DOS)
If I wished to create a RAM drive (additional D:, E:, F:, etc.) using 512KB of expanded memory... (most common setting)
device=c:\intel\quikmem2.sys 512
Parameter must be a multiple of 16.
You are Welcome!!!