Tanzania I + II

Possibility`s of the LPX-40 Design



 CPU - OPTION
			Selects the CPUcore Clock. Depends on the Busclock.

at 40 MHz:

CPUClock

PLL

R24

R22

R9

R2

R23

R21

R8

R1

80MHz

x2

-

X

-

-

X

-

X

X

100MHz

x2.5

-

X

X

-

X

-

-

X

120MHz

x3

X

-

-

-

-

X

X

X

140MHz

x3.5

X

X

X

-

-

-

-

X

160MHz

x4

X

-

X

-

-

X

-

X

180MHz

x4.5

-

X

X

X

X

-

-

-

200MHz

x5

X

-

X

X

-

X

-

-

220MHz

x5.5

X

-

-

X

-

X

X

-

240MHz

x6

X

X

-

X

-

-

X

-

For max. Busperformance avoid odd Divisors like 2,5:1.

X = Rn in place

- = Rn not soldered in

R2, R9, R22, R24 = 4.7K

R1, R8, R21, R23 = 51 ohm


Feature Option

Selects the CPU-ID, MFM-Floppy, GCR- Floppy, PS/2 Ports and 10BaseT.

Pin 11 = H -> Gestalt ID 515

Pin 11 = L -> Gestalt ID 514

All others are currently unknown.


CPU ID

currently unknown


10BaseT on board Ethernet

The Chip used for 10BaseT is a LXT 905 PC.


MFM Floppycontroller

SMC 37c78


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