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30 Cards in this Set
- Front
- Back
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one type of volatile memory is
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RAM
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the 68000 microprocessor can address 16M byte memory locations. The last memory byte location is
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$FF FFFF
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the first adress line (A0) of a memory chip is always connected to the....pin of the 68000 microprocessor
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A1
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A single 4096x8 EPROM could have a byte address range from $0000 to
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$0FFF
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the MK4118 chip is organized as 1024x8.HOw many chips are needed to have a 4096x16 memory for the 6800 microprocessor
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8
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the total number of adress locations in a page of memory is
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256
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how many adress pins should an EPROM have if it is organized as 8192x8
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13
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a ROM has 8 data lines and adress lines labelled A0 to A9. How many chips are needed before it can be used by the 6800 microprocessor
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2
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a dynamic RAM must be constantly...to avoid data loss
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Refreshed
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the three processing states in the 6800 are: normal, halted and
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exception
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the 6800 microprocessor has a vector table that occupies the memory map from $00 0000 to
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$00 03FF
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the TRAP 5 vector is located at memory location $0094. There are....memory locations allocated to it
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4
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the priviledge violation exception is vector number 8. Its location in the memory map is
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$0020
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the last instruction in an interrupt service routine is
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RTE
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the exception that allows single_stepping through a program is
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trace
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the highest priority on the interrupt request lines is a level..... code
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7
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a nonmaskable interrupt request is the following code on the IPLO-IPL2 pins
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000
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if the S bit is a one (1) in the staus register, the microprocessor is in the....mode
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supervisor
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an externally generated exception is
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BERR
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a sotfware exception is
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TRAPV
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when the 6800 microprocessor goes to the memory address of a specified vector, it loads the contents of those memory locations in the
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Program counter
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for a group 1 or 2 exception,the microprocessor saves the contents of the status register and the program counter on the
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supervisor stack
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for question No.22, in order to save the information,....word locations are required
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3
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the adress of a vector is $000080.the vector number is
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32
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DMA ( direct memory access) permits the transfer of data btwn a peripheral and the microprocessor's RAM memory and bypasses the
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CPU
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A DMA controller takes control of the system buses through bus
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abitration
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the 68000 bus abitration controls signals are BG, BGACK and
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BR
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the signal that the 68000 provides to the DMA controller is
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BG
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the three ( 3) bits that allow interrupts to be masked are located in the
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status register
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to store three (3) words in memory requires.....memory locations
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six
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