Type 0-x0x
386DX-20 64KB L2 cache
 |
Refdisk (no diags disk)
Only 386 based complex
Supports 1, 2, 4MB 85nS
32MB FPM maximum (?) |
Type 1 Index
for -xGx, -xJx, -xKx and upg |
Type 1 Refdisk Specific to Type 1
Diags (Common to all 90/95/500)
Needs 52G9509 BIOS for >1GB IML |
Type 1 -xGx
SX-20
 |
No L2 cache connector
2, 4, 8MB 70nS FPM matched pairs.
64MB FPM maximum.
Some may have bad DMA controller |
Type 1 -xJx,
-xKx,
Upgrade
DX-50
CPU MHz 25MHz -xJx (DX-25)
33MHz
-xKx (DX-33)
50MHz
Upg (DX-50) |
2, 4, 8MB FPM simms.matched pairs
64MB FPM maximum.
Some may have bad DMA controller
Accepts 256K L2 daughterboard
L2 Cache- 6451095/0199) 17nS
L2 Cache- 92F0050 15nS (Upg 50!) |
Type 1 Upgrade
DX2-66 (DX-66)
 |
2, 4, 8MB FPM simms.matched pairs
64MB FPM maximum.
Flash based, supports >1GB IML
Used for RAID systems
** No flash upgrade available **
256K L2 Cache 6451095 17nS
(64F0199) |
Type 2 Index -xHx and -xLx |
Type 2 Refdisk Specific to Type 2
Diags (Common to all 90/95/500)
Needs 41G9361 BIOS for >1GB IML |
Type 2 -xHx
(SX2-50) ,
-xLx (DX2-50)
 |
No L2 cache connector
Supports 2, 4, 8MB 70nS FPM simms.
SIMMs single, matched or mixed pairs
64MB FPM maximum.
Some may have bad DMA controller |
Type 3 [There can be only one!] |
Type 3 Refdisk Specific to M
complex
Diags (Common to all 90/95/500) |
Type 3 -xMx
DX-50 256KB L2 cache
Only double deck complex True 50MHz Bus!! |
SIMMs installed in matched pairs
64MB ECC -or- FPM maximum.
Enhanced BIOS for >1GB IML drive
Some reworked, bad streamer support
32 Bit DMA
Accepts 3x and (careful!) 4x CPUs |
Type 4 Index
-xNx, -xPx, -xQx and -xYx |
Type 4 Refdisk Specific to Type 4
Diags (Common to all 90/95/500)
BIOS 08 (dual serial /parallel)
BIOS 10 (single serial / parallel) |
Type 4 -xNx
DX-66 128KB L2 cache |
SIMMs matched pairs
64MB FPM -or- 256 ECC max
Some reworked, bad streamer support
No Synchrostream controller
32 Bit DMA
Supports 041xh and 043xh CPUIDs HERE |
Type 4 -xPx
P60 256KB L2 cache
 |
SIMMs installed in matched pairs
64MB FPM -or- 256 ECC max
Synchrostream controller
32 Bit DMA |
Type 4 -xQx
P66 256KB L2 cache
 |
SIMMs installed in matched pairs
64MB FPM -or- 256 ECC max
Synchrostream controller
32 Bit DMA |
Type 4 -xYx
P90 256KB L2 cache
 |
SIMMs installed in matched pairs
64MB FPM -or- 256 ECC max
Synchrostream controller
32 Bit DMA |