Genicom MatrixPrinter LA36 - Manual (Page 110)

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5.3.2 Main controller
The main controller circuit of the printer –– the MB90706 MPU –– has a bus connected to 4M-bit ROM, two-
16M-bit ROMs, 128K word x 16-bit RAM, and a control LSI. Firmware functions are built into the 4M-bit
ROM and one of the two 16M-bit ROMs is reserved for optional CG data.
000000
5FFFFF
600000
A00000
C00000
E00000
FFFFFF
ROM
ROM
ROM
RAM
I/O and
work RAM
Program ROM
Resident CG
Buffer RAM
Resident CG
(optional)
Figure 5.22 Memory configuration
Main firmware ROM has a capacity of 4M bits and contains resident emulation programs.