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Index
| Hex Code: | 42 | 00 | 00 | 0T | PP | PP | 00 | 00 | unconditional, indirect |
|---|---|---|---|---|---|---|---|---|---|
| 42 | M0 | 00 | 0T | PP | PP | XX | YY | M=1-7, Compare register XX to register YY, indirect | |
| 42 | 0K | 00 | 0T | PP | PP | HH | LL | unconditional, indirect, K=1,4-7 Set then Link | |
| 52 | 00 | TT | TT | PP | PP | 00 | 00 | unconditional, direct | |
| 52 | M0 | TT | TT | PP | PP | XX | YY | M=1-7, Compare register XX to register YY, direct | |
| 52 | 0K | TT | TT | PP | PP | HH | LL | unconditional, direct, K=1,4-7 Set then Link |
| Restrictions: | The SetNVTMR may be used only in the title domain. |
| Action: | The SetNVTMR sets the Navigation Timer, (NVTMR, SPRM 9) and destination PGC, (NV_PGCN, SPRM 10).
NVTMR decrements by one every second until it reaches zero, at that time if NV_PGCN is non-zero a jump to PGC indicated by NV_PGCN is made. The indirect form sets SPRM 9 to the value in GPRM register "T" (lower nibble of byte 3) and SPRM 10 to the value "PPPP" (bytes 4&5). The direct form sets SPRM 9 to "TTTT" (bytes 2&3) and SPRM 10 to "PPPP" (bytes 4&5). If "K" is 1, 4, 5, 6, or 7 the Set is followed by a link command. |
| Order: | If a compare is specified, it is performed first. If the condition is met the SetNVTMR is executed. |
| Comments: | The command can be conditional or be combined with a link command, but not both.
See also SPRMs for information on SPRM 9 and 10 values. |
| Optional Link Command details | |||
|---|---|---|---|
| K | LL | Link Command | Comment |
| 1 | 00 | LinkNoLink | use byte 6 as "HH" in these detailed pages, ignore all other values. |
| 1 | 01 | LinkTopCell | |
| 1 | 02 | LinkNextCell | |
| 1 | 03 | LinkPrevCell | |
| 1 | 05 | LinkTopPG | |
| 1 | 06 | LinkNextPG | |
| 1 | 07 | LinkPrevPG | |
| 1 | 09 | LinkTopPGC | |
| 1 | 0A | LinkNextPGC | |
| 1 | 0B | LinkPrevPGC | |
| 1 | 0C | LinkGoUpPGC | |
| 1 | 0D | LinkTailPGC | |
| 1 | 10 | RSM | |
| 4 | -- | LinkPGCN | use bytes 6 and 7 as "NNNN" in this detailed page, ignore all other values. |
| 5 | -- | LinkPTTN | use bytes 6 and 7 as "HTTT" in this detailed page, ignore all other values. |
| 6 | -- | LinkPGN | use bytes 6 and 7 as "HHPP" in this detailed page, ignore all other values. |
| 7 | -- | LinkCN | use bytes 6 and 7 as "HHNN" in this detailed page, ignore all other values. |
| Compare operation codes | |||
|---|---|---|---|
| register to register | Alternate mnemonic | Comments | |
| M | operation | ||
| 1 | RegX & RegY | BC | Bitwise compare, the two operands are anded, if the result is non-zero the condition is true |
| 2 | RegX == RegY | EQ | If the two operands are equal the condition is true |
| 3 | RegX != RegY | NE | If the two operands are not equal the condition is true |
| 4 | RegX >= RegY | GE | If RegX is greater than or equal to the right operand the condition is true |
| 5 | RegX > RegY | GT | If RegX is greater than the right operand the condition is true |
| 6 | RegX <= RegY | LE | If RegX is less than or equal to the right operand the condition is true |
| 7 | RegX < RegY | LT | If RegX is less than the right operand the condition is true |
| Register Codes | |
|---|---|
| 0x00 through 0x0F | General Purpose registers 0 to 15 (GPRM) |
| 0x80 through 0x97 | System Parameter registers 0 to 23 (SPRM) |
| all others | do not use |
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