HP 300 Service Information Manual

98561-66519 Processor BoardGeneral DescriptionThe 98561-66519 processor board has the following features:• MC6840 Systeln Timer.• 16.6 MHz MC68020 microprocessor.• Optional l\fC68881 Floating-Point Coprocessor• Boot ROM.• Eight Self-Test LEDs• 32-bit wide Virtual Cache Memory• 32-bit wide Memory Management Unit• Miscellaneous other components needed by HP Operating Systems (HP-UX, Pascal, BA-SIC).Figure 3-11 is a block diagram of the 98561-66519 processor. Refer to this diagram for functionaldescriptions.~-- --- -",'''''' - -[~ --------U29COPTA(22:2)--PA(23:1)---->------- r-PO(31 :0) CACHE TLB- MMUPROCESSOR ,- PROC CONTROL8PO(31 :0)U42~~ 10(15:0)PROC_CONTROL 010 INT~~:O) -1 I WALKEN'"~~U CONTROL~OEN'"TWR'"TOE'"~---PROC_CONTROLf-~--~~E~~ PAlCl ~--~>-- PROC .f~ PA3102I" BLA(23:21).BLA13 1015----------- CONTROLL,. 010 CONTROL-- S PINO~OSKO'" TEST SLKUP'"aSK1'" I-- --Figure 3-11. 98561-66519 Processor Board Block DiagramFunctional Description 57Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com