Ardent Tool of Capitalism

The go-to place for all IBM PS/2 and Micro Channel enthusiasts

Processor Complex Identification

Type 0 | Type 1 | Type 2 | Type 3 | Type 4

"Type 0 Minus" 386DX 20 MHz, FRU P/N 64F0782, FCC ID ANO386201A
	No L2 cache 1 or 2 MB 85 ns (80 ns?), 4 SIMMs max 8 MB parity max (+8 MB on channel) 24-bit DMA

"Type 0 Plus" 386DX 20 MHz, FRU P/N 04G3884, FCC ID ANO38620C1A
	64 KB 25 ns L2 cache 1 or 2 MB 85 ns (80 ns?), 4 SIMMs max 8 MB parity max (+8 MB on channel) 24-bit DMA

Base 1 / Type 1

Refdisk | Diags | BIOS

-xGx 486SX 20 MHz, FRU P/N 92F0049, FCC ID ANOIBM486A20
	No L2 cache connector 2, 4, 8 MB 70 ns parity matched pairs 64 MB parity max, 24-bit DMA Some with bad DMA controller

-xJx 486DX 25 MHz, FRU P/N 64F0201, 84F8036, FCC ID ANOIBM486A25 -xKx 486DX 33 MHz, FRU P/N 64F0198, 84F9356, FCC ID ANOIBM486A33
	2, 4, 8 MB parity matched pairs 64 MB parity max, 24-bit DMA Some with bad DMA controller Optional 256 KB 17 ns WT L2 cache (L2 board FRU P/N 6451095, 64F0199)

Upgrade DX-50 486DX 50 MHz, FRU P/N 92F0048, FCC ID ANOIBM486A50
	2, 4, 8 MB parity matched pairs 64 MB parity max, 24-bit DMA Some with bad DMA controller Standard 256 KB 15 ns WT L2 cache (L2 board FRU P/N 92F0050)

Upgrade DX2-66 486DX2 66 MHz, FRU P/N 92F0145, FCC ID ANOIBM486B33
	2, 4, 8 MB parity matched pairs 64 MB parity max Optional 256 KB 17 ns WT L2 cache (L2 board FRU P/N 6451095, 64F0199) Flash based, supports >1 GB IML

Base 2 / Type 2

Refdisk | Diags | BIOS

-xHx 486SX 25 MHz, FRU P/N 92F0079, FCC ID ANOIBM486SXB25 (same as xLx)
	No L2 cache 2, 4, 8 MB 70 ns parity SIMMs parity single, matched, mixed pairs 64 MB parity max, 24-bit DMA Some with bad DMA controller

-xLx 486DX2 50 MHz, FRU P/N 92F0161, FCC ID ANOIBM486SXB25 (same as xHx)
	No L2 cache 2, 4, 8 MB 70 ns parity SIMMs parity single, matched, mixed pairs 64 MB parity max, 24-bit DMA Some with bad DMA controller

Base 3 / Type 3

Refdisk | Diags | BIOS

-xMx 486DX 50 MHz, FRU P/N 82G2484, 57F1597, FCC ID ANOIBM486B50
	Two board construction 256 KB L2 WT cache SIMMs in matched pairs 64 MB ECC -or- 64 MB parity max 32-bit DMA Some with bad streamer support

Base 4 / Type 4

Refdisk | Diags | BIOS

-xNx 486DX2 66 MHz, FRU P/N 61G2343, FCC ID ANOIBM486C33
	128 KB L2 WB cache 169-pin Socket (LIF, 5 V) SIMMs matched pairs 64 MB parity -or- 256 MB ECC max 32-bit DMA SynchroStream Controller

-xPx Pentium 60 MHz, FRU P/N 52G9362, 06H7324, FCC ID ANOIBM586A60 -xQx Pentium 66 MHz, FRU P/N 92F0120, 06H7317, FCC ID ANOIBM586A66 \|
	256 KB L2 WB cache Socket 4 (LIF, 5 V) SIMMs in matched pairs 64 MB parity -or- 256 MB ECC max 32-bit DMA SynchroStream Controller Two different PCB layouts

-xYx Pentium 90 MHz, FRU P/N 06H3739, 06H7095, FCC ID ANO6H3729
	256 KB L2 WB cache Socket 5 (LIF, 3.3 V) SIMMs in matched pairs 64 MB parity -or- 256 MB ECC max 32-bit DMA SynchroStream Controller

None of the above? Also see Japanese PS/55 Processor Complexes.

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