Sparrow: Difference between revisions
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(Created page with "Category:Hardware Category:Spectrum Category:Clones thumb The '''Sparrow 48K''' (formerly known as ''Sparrow LITE'') is a modern...") |
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* protection against use of power supplies with wrong polarity | * protection against use of power supplies with wrong polarity | ||
* power supply voltage up to 25V | * power supply voltage up to 25V | ||
* [ | * [http://zxsparrow.com/speccy_hw/FADI/index_eng.xhtml FADI compliant] design | ||
'''Sparrow SX''' prototypes rev1 and rev2 include these onboard enhancements (each individually switchable): | '''Sparrow SX''' prototypes rev1 and rev2 include these onboard enhancements (each individually switchable): | ||
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==External links== | ==External links== | ||
*[ | *[http://zxsparrow.com/speccy_hw/Sparrow48K/index_eng.html Sparrow 48K website] | ||
Latest revision as of 18:11, 26 May 2021
The Sparrow 48K (formerly known as Sparrow LITE) is a modernized motherboard replacement, that fits into original „rubber“ ZX Spectrum and ZX Spectrum+ cases.
The board has a simple design with a number of improvements:
- composite video output, instead of a RF modulated signal
- video RAM in a single SRAM chip
- main 32KB RAM in a single SRAM chip
- system 16KB ROM selectable from 8 different ROMs in 128KB FlashROM chip, manually by DIP switch or with software via internal MultiROM expansion
- one small CPLD chip from Altera, instead of old 74LSxx chips
- pin rows for internal zx-bus expansions
- LM2596 regulator instead of the overheating original 7805
- +12V is done by small 1 Watt DC-DC Converter (and now needed only for the LM1889 video chip)
- -5V power is no longer needed
- protection against use of power supplies with wrong polarity
- power supply voltage up to 25V
- FADI compliant design
Sparrow SX prototypes rev1 and rev2 include these onboard enhancements (each individually switchable):
- RTC chip
- AY soundchip
- MultiROM
- RAM/CS signal on the edge connector for external upper-memory expansion