10 Jun
2001
10 Jun
'01
6:03 a.m.
Could URAM be 'uRAM' -- i.e. microcode RAM? In
which case it could be an
optional expansion to the control store or an essential part of the CPU.
What boards do you have? We might be able to figure out what they are and
what (if anything) is missing.
My Lilith has the following boards :
MCU : microcode in bipolar PROM's
ALU : 4x 2901 Bit sliceCPU
CPU : Serial channel ??( Has an 1602 UART )
IFU : interface unit.
4x64Kb mem boards ( with 16kb DRAM chips )
DSP : Display interface
DSK : interface to 10Mb removable HD
I/O : one RS232 channel.
Missing are uRAM, DPU, DMA ( only used to drive a laserprinter ) and some I/O
options.
I've never heard about programmable microcode in the Lilith, so I presume the
uRAM is an option.
It could still be a complete computer, but I intend to go
slowly with this one. (i.e. following Tony's rules of checking PSU first etc. )
Jos