Pentagon-1024ZP - Crocodile ZX Spectrum Sinclair - Computer

Computer ZX Spectrum - Pentagon-1024ZP - Crocodile - new motherboard , full works , joystick , keyboard, hdmi adapter, usb keyboard, ZX Spectrum - Divmmc + sd card ( game + software) , PC case


ZX Spectrum - Pentagon-1024ZP Crocodile
The board was developed by me specifically for installation in a PC case, the board format of the MicroATX standard is 243.84 mm * 243.84 mm. Of the board features: RAM 1024 kB on a pair of SRAM chips with full addressing (not imitation DRAM), ROM at 512 kB (8 banks of 64 kB), digital INT, digital boundary correction, 4 NemoBus slots with a switchable BDI blocking signal for Divmmc operation, NemoIDE CD/HDD controller on the board, reset scheme implemented in bank 0, Turbo Sound sound on a pair of original Yamaha YM2149F, Kempston 8bit joystick. There is a RAM 128/1024 kB mode switch. Convenient connection to RGB to VGA/HDMI converters with switching of KSI/SSI/Sync jumpers, as well as with selection of pixel clock frequency 14/3.5 MHz. Connectors for video output, keyboard connection, Kempston joystick, audio output and TAPEIN/TAPEOUT are located in the "usual" place for the PC case and are also duplicated with the pins on the board. ATX24(20) pin power connector. The KR1818VH93 emulator is installed as the FDC controller (project of Evgeny Ugryumov). Tested operation with FDD 3.5 emulator and OpenFlop alias Gotek.

- USB keyboard adapter
- RGB to HDMI adapter
- ZX Spectrum - Divmmc + sdcard