TVROM: Difference between revisions
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== Hardware == | == Hardware == | ||
For | For its 4-screen mirroring, this boards uses a 8 KB SRAM chip, but only 4 KB is actually used. | ||
The 2 KB VRAM inside of the console is always disabled, and the CIRAM A10 pin of the MMC3 doesn't go to anything. | |||
== See also == | == See also == | ||
*[[MMC3|Nintendo MMC3]] | *[[MMC3|Nintendo MMC3]] | ||
Revision as of 17:16, 26 January 2010
TVROM (NES-TVROM) is one of the less common boards within the TxROM set. Like other TxROM boards, TVROM uses the Nintendo MMC3 ASIC. It should be noted that most probably, only american NES-TVROM boards have ever been produced, so this board has likely no 60-pin "HVC-TVROM" counterpart.
Overview
- PRG ROM size: 64 KB (DIP-28 Nintendo pinout)
- PRG ROM bank size: 8 KB
- PRG RAM: None
- CHR capacity: 64 KB ROM (DIP-28 standard pinout)
- CHR bank size: 1 KB and 2 KB
- Nametable mirroring: Hardwired 4 screen mirroring
- Subject to bus conflicts: No
Hardware
For its 4-screen mirroring, this boards uses a 8 KB SRAM chip, but only 4 KB is actually used. The 2 KB VRAM inside of the console is always disabled, and the CIRAM A10 pin of the MMC3 doesn't go to anything.
