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Zx Spectrum 1:1 replica, with minor changes ;-)
(ok.. i like CLONE word only in the "movie" title)
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Technical data:
- 2 layer board of 74.17x213.49mm
- FPGA and real Z80 cpu based
- Turbo Sound Interface - 2 x AY chips
- Sound Drive / Covox x 4
- mini din 9 audio/RGB out / SEGA
- TAPE in/out integrated in one jack stereo
- ULA PLUS
- max 512kb ram
- new pcb revison with 2 dedicated clock generators, to obtain perfect timings of 128/48/pentagon modes
- Button: short CLICK - mode chnage, LONG - reset
- Mode selected with button press and stored after power off
- Modes:
- ZX 48
- ZX128
- Pentagon
- Pentagon + ULA PLUS
- Amstrad Speccy
- DIagnorom 1 in ZX128 mode
- Diagnorom 2 in ZX128 mode
rev 1.0
rev 1.1A
rev 1.2 (2025-05-10) - CODENAME "KRAKEN"
rev 1.3 - i hope final ;-)
- reworked power supply
- any power supply ranged 8-10V shall work
- minor dimensions/fitting holes corrections
- minor connectors positions corrections
- ULA PLUS video circuit from fpga added
- external clock, IORQ_E, Clock slector built on 1g chips ( in order to get extra pins from FPGA)
- added tackt switch to enable JTAG mode of fpga
- Dual purpose pins used to maximum ;-) (excpet reconfig_N)
- dedicated port #FE octal bus tranciver added for Keybaord and TAPE_IN (yes..lack of pins in FPGA)
- many minor changes... to many to remeber ;-)
rev 1.4 - added AVR
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