Search found 745 matches
- Sat Mar 15, 2008 4:04 am
- Forum: Regen
- Topic: Old Regen pages
- Replies: 547
- Views: 768654
Hm ... A good emulator, sound pleasant. But there is a couple of comments: 1. In "Sub Terrania" melodies a periodic strange sounds happens and BGM sounds different. Here is the record of melody "Carousel". For test purpose, you can use my PD-ROM's . I used emulator for P4. 2. I want to an advanced d...
- Sat Feb 16, 2008 5:57 pm
- Forum: Hardware
- Topic: Workings of the Mega Drive: Bus Interactions
- Replies: 10
- Views: 16234
This mean that the value written at these adresses is then read from DATA bus by additional cart hardware (chip selected by !TIME), which also do some address decoding if multiple addresses can be used (for example, bankswitching at $A130Fx, see ssf2). I have an 10in1 cart, mapper on 161 register w...
- Sat Feb 16, 2008 5:22 pm
- Forum: Hardware
- Topic: Workings of the Mega Drive: Bus Interactions
- Replies: 10
- Views: 16234
One "interesting" thing you can also see one the schematics is that the Bus Arbitrer takes only VD8 and ZD0 data lines... I presume it's because it only needs bit8 (bit 0 with 8bits access) of DATA bus when accessing the ZBUSREQ/ZBUSACK and ZRESET signals (bit8 in $A11100 and $A11200) I confirm tha...
- Sat Feb 16, 2008 3:05 pm
- Forum: Hardware
- Topic: Workings of the Mega Drive: Bus Interactions
- Replies: 10
- Views: 16234
- Sun Jan 27, 2008 4:57 am
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
I tried EDO DRAM. It cost me a major headache. I understand that the use of FPGA would simplify all my effort, but I want device wich cheaper and more importantly - easily repeated by newbie. Therefore, and focused on PSRAM. In addition, when using DDR or DDR2 or even SDRAM memory you will have to n...
- Sat Jan 26, 2008 9:05 am
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
Well, then you need to mark all the technical specifications of the project. If the cartridge is not designed to run ROMs, then no need put 4 Mbytes buffer. Use only RAM in console or add a small buffer if necessary. Boot ROM will just have to put to the work with MMC/SD. But USB, IMHO, is not neede...
- Sat Jan 26, 2008 6:19 am
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
- Fri Jan 25, 2008 4:41 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
- Fri Jan 25, 2008 1:07 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
@HardWareMan-> But SegaIDE need lot of hardware mods /wires/... So You must mod console... /But maybe better solution as cartrige.../ Can it be as standalone interface for CD connector??? There no need to mod the console to use my SegaIDE. Every console with SegaCD connector can work with it. And S...
- Thu Jan 24, 2008 7:12 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
Use this. All what you need.
- Thu Jan 24, 2008 6:58 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
Quick question: How long does reading a whole 512byte sector from a SD/MMC takes? (Just 1 sector) Maximum theoretical speed is 33MHz of clock signal or 33Mbits (info from datasheet). But not all cards can handle that. And bus cycle are more complex. You can use MMC+ or even SD interface (wich 8 bit...
- Thu Jan 24, 2008 6:47 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
- Thu Jan 24, 2008 12:12 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
Okay, here's my idea: Make the cart with an FPGA, the SD card adapter, and a 4MB SRAM. Have the FPGA read the "boot sector" (however you wish to define that) into the start of the SRAM on powerup or reset. That code can then act as a loader for running programs from the SD card. It would also conta...
- Wed Jan 23, 2008 1:36 pm
- Forum: Hardware
- Topic: ~ OPENSOURCE USB CARTRIGE DEVELOPMENT ~
- Replies: 107
- Views: 83442
- Thu Jan 10, 2008 3:59 pm
- Forum: Blabla
- Topic: More 315-5313 unknown stuff (speculation)
- Replies: 52
- Views: 45733