trunk/src/mame/drivers/8080bw.c
| r20172 | r20173 | |
|---|
| 123 | 123 | there at all |
| 124 | 124 | |
| 125 | 125 | - Space Chaser (schaser) |
| 126 | | 1. Strange bug; sometimes the missile sound continues into the |
| 127 | | music/explosion. |
| 128 | | 2. If "Hard" mode is selected, numerous bugs appear which |
| 129 | | seems to be an emulation fault. Every revision we have |
| 130 | | shows the problem, whereas the real hardware works fine. |
| 131 | | - You start with 9000 points (instead of 0). |
| 132 | | - On the screen where you are awarded your Bonus, you will |
| 133 | | instead get (or sometimes lose) a random amount. |
| 134 | | - At the end, if you got the High Score, it could be changed |
| 135 | | to something else. |
| 136 | | All these bugs can be cured by a simple 1-byte patch: |
| 137 | | ROM_FILL( 0x47e5, 1, 0xc3), but why is it necessary? |
| 126 | 1. Schematic has SX2 & 4 swapped by mistake. |
| 138 | 127 | |
| 128 | 2. Dipswitch 4 we have listed as "Easy/Hard", however the manual says |
| 129 | it should not be used. The Hard position displays many bugs. |
| 130 | |
| 131 | 3. Confirmation of these on a real machine (schaserb set) have been |
| 132 | received from the owner of the PCB. |
| 133 | "Hi Rob, |
| 134 | I seem to get the same bugs as you with Dip4 set to off. Score starts at 9000, |
| 135 | 2 missiles on first level etc.. It makes no mention of dip4 adjusting the hardness |
| 136 | in the manual, are you guys sure that's what it was intended for "in the factory"? |
| 137 | However you were correct in thinking the schematics were wrong. My multimeter found |
| 138 | the following: |
| 139 | 15k resistor - pin 7 |
| 140 | 39k - pin 10 |
| 141 | 82k - pin 12 |
| 142 | It looks like they have Sx2 and Sx4 the wrong way round on a latter page of the schematics." |
| 143 | |
| 144 | 4. The "Hard" mode bug can be fixed with a single byte patch: ROM_FILL( 0x47e5, 1, 0xc3) |
| 145 | |
| 146 | 5. I have seen real machines with Hard mode set, that worked properly, thus there |
| 147 | must be yet another romset still waiting to be found. |
| 148 | |
| 149 | 6. Strange bug; sometimes the missile sound continues into and past the |
| 150 | music/explosion. This didn't happen on the real machines I played. |
| 151 | |
| 139 | 152 | - Space Chaser (schasercv) |
| 140 | 153 | These cheats exist in this game: |
| 141 | 154 | 1. Hold down 2P DOWN (the F key) while it says INSERT COIN. Then |