SoC: Difference between revisions
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(Created page with "The WonderSwan SoC is a single-chip solution powering the entirety of the system's hardware - containing the CPU, most peripheral logic, as well as the internal RAM. There exist three variants of the SoC: * ASWAN, used in the WonderSwan, * SPHINX, used in the WonderSwan Color, * SPHINX2, used in the SwanCrystal. A fourth variant, CAIRO, was planned. It was designed as an ASWAN with a doubled clock speed and a built-in ADPCM decoder, but was never licensed for a commer...") |
(add CAIRO reference) |
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* SPHINX2, used in the SwanCrystal. | * SPHINX2, used in the SwanCrystal. | ||
A fourth variant, CAIRO, was planned. It was designed as an ASWAN with a doubled clock speed and a built-in ADPCM decoder, but was never licensed for a commercial product. | A fourth variant, CAIRO, was planned<ref>[https://web.archive.org/web/20071023111112/http://www.koto.co.jp/products/mono_sp.html CAIRO グラフィックス機能内蔵ローコストSoC - Wayback Machine]</ref>. It was designed as an ASWAN with a doubled clock speed and a built-in ADPCM decoder, but was never licensed for a commercial product. | ||
== I/O ports == | == I/O ports == | ||
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1 = SwanCrystal (SPHINX2) | 1 = SwanCrystal (SPHINX2) | ||
</pre> | </pre> | ||
== Notes == | |||
<references /> | |||
Revision as of 11:04, 27 August 2023
The WonderSwan SoC is a single-chip solution powering the entirety of the system's hardware - containing the CPU, most peripheral logic, as well as the internal RAM.
There exist three variants of the SoC:
- ASWAN, used in the WonderSwan,
- SPHINX, used in the WonderSwan Color,
- SPHINX2, used in the SwanCrystal.
A fourth variant, CAIRO, was planned[1]. It was designed as an ASWAN with a doubled clock speed and a built-in ADPCM decoder, but was never licensed for a commercial product.
I/O ports
System Control ($A0)
7 bit 0 ---- ---- t??? swcl | |||| | |||+- Boot ROM lockout: 0 = off, 1 = on | ||+-- Color model: 0 = no, 1 = yes | |+--- Cartridge bus width: 0 = 8-bit, 1 = 16-bit | +---- Cartridge bus speed; 0 = 3 cycles, 1 = 1 cycle +--------- MBC authentication successful?
System Control 2 ($60, color)
7 bit 0
---- ----
c4C. ?.??
|||
||+------- 1 = 4bpp "chunky"; requires all previous
|+-------- 1 = 4bpp; requires all previous
+--------- 0 = mono, 1 = color; also controls access
to WSC-specific features (extra RAM, DMA, etc.)
System Control 3 ($62, color)
7 bit 0
---- ----
S... ...p
| |
| +- 1 = Power off system
+--------- 0 = WonderSwan Color (SPHINX)
1 = SwanCrystal (SPHINX2)
