Term
| Before setting up an Interrupt Service Routine what must be done? |
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Definition
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Term
| Which hardware subsystem catches interrupt messages |
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Definition
| None of the Above (interrupt subsystem) |
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Term
| When timer interrupts are enabled when does the interrupt occur? |
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Definition
| When the timer count overflows the data register |
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Term
| Which step does not automatically happen when an interrupt gets triggered? |
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Definition
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Term
| Where do you copy the address of your custom interrupt service routing to in GBA memory? |
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Definition
| 0x3007FFC – beginning of Stack in IWRAM |
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Term
| You may need to handle multiple interrupts at one time. |
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Definition
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Term
| Since the GBA CPU is a RISC processor, we can manipulate multiple data items in memory at once? |
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Definition
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Term
| How many registers must you set to transform a rotational background properly? |
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Definition
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Term
| Because of the way parameters are passed to C/C++ non-member functions (NMF) and C++ member functions (MF), those that pass over N parameters should be considered less efficient. What is N? |
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Definition
| 4 for C/C++ NMF, 3 for C++ member functions |
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Term
In a 2D matrix, where would you set the rotational data?
X1, Y1, Z1
X2, Y2, Z2
Z3, Y3, Z3 |
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Definition
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Term
| The data processing operations can operate on 8, 16, or 32 bit values |
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Definition
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Term
| What will happen if you left shift a 24.8 fixed point value by 24? |
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Definition
| You will lose the integer part of the number |
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Term
| If your code uses addition, subtraction, and multiplication then there is no performance difference between signed and unsigned operations |
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Definition
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Term
| the system can be configured for either big or little endian operation, but little endian is the default |
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Definition
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Term
| To reduce the impact of pointer aliasing overhead (extra data retrieval) what optimization can we use? |
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Definition
| Assign a local variable to a value |
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Term
How do you restore an interrupt?
U_32 nFlags = 0;
nFlags = REG_IF; |
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Definition
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Term
| Which register would you check to determine which interrupt has occurred? |
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Definition
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Term
| What is the largest value an individual timer can hold? |
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Definition
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Term
| All timers share the same interrupt |
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Definition
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Term
| If you multiply a 24.8 and a 24.8 fixed point value, what is the resulting fixed point value? |
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Definition
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Term
| How many bits are used for tile map entries of rotational backgrounds? |
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Definition
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Term
| How many digital sound channels are available on the GBA? |
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Definition
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Term
| Can a timer counter be extended by using other registers? |
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Definition
| Yes, a timer counter can be linked to the next counter to extend the 16 bit range |
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Term
| What is pointer aliasing in reference to two pointers? |
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Definition
| Both point to the same address |
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Term
In a 2D matrix where would you set the translation data?
X1, Y1, Z1
X2, Y2, Z2
Z3, Y3, Z3 |
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Definition
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Term
| Using a pointer to move sequentially through an array is more efficient than using x[i] because all ARM load and store instructions have a post increment mode |
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Definition
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Term
| Multiplying a matrix A by matrix B will always result in the same materix as multiplying matrix B by matrix A |
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Definition
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Term
| What are the steps to enable an interrupt? |
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Definition
Disable the master interrupt
Point the ISR to your function handler
Enable an interrupt in REG_IE and at its throw register
Enable the master interrupt |
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Term
| You should avoid short or char for function arguments or return values to avoid extra casts |
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Definition
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Term
| If you loop iteration count can not be zero then what type of loop construct should we use? |
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Definition
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Term
| It is possible for an interrupt to occur while you are handling another interrupt |
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Definition
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Term
| If I add two fixed point values of 16.16, what would I have to do before setting it to one of the rotational background transform registers? |
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Definition
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