diff --git a/README.en.md b/README.en.md index 7728d33..fee5e7e 100644 --- a/README.en.md +++ b/README.en.md @@ -21,13 +21,13 @@ The project is available in two structural options depending on your custom encl * The circuitry is split across two separate stacked PCBs to facilitate clean routing of large through-hole (DIP) components. * The perfect choice for vintage enthusiasts who prefer simple, spacious home soldering. * Features a standard male Spectrum expansion Edge connector pass-through. - * **Bottom Board:** [Schematics](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) | [Placement](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) | [Gerber](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) - * **Top Board:** [Schematics](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) | [Placement](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) | [Gerber](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) + * **Bottom Board:** [Schematics](Export/ZX%20BDI%202%20PCB%20Lower.pdf) | [Placement](Export/ZX%20BDI%202%20PCB%20Lower.html) | [Gerber](Gerber/ZX_BDI_2_PCB_Lower_Gerbers.zip) + * **Top Board:** [Schematics](Export/ZX%20BDI%202%20PCB%20Upper.pdf) | [Placement](Export/ZX%20BDI%202%20PCB%20Upper.html) | [Gerber](Gerber/ZX_BDI_2_PCB_Upper_Gerbers.zip) ### 2. Compact Single (Single-Board Layout) * A modern, dense layout with all components tightly grouped onto a single printed circuit board. * Features minimal dimensions, looking very neat and compact when plugged straight into the computer's back edge expansion port. - * [Schematics](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) | [Placement](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) | [Gerber](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface) + * [Schematics](Export/ZX%20BDI%201%20PCB.pdf) | [Placement](Export/ZX%20BDI%201%20PCB.html) | [Gerber](Gerber/ZX_BDI_TR_DOS_Grbers.zip) *** @@ -39,14 +39,14 @@ The project is available in two structural options depending on your custom encl ⚠️ **ATTENTION:** It is highly recommended to strictly use the **MB8877** chip (or its direct 5V CMOS equivalents). Attempting to drop in a classic Soviet КР1818ВГ93 or Western Digital WD1793 chip without manually rerouting the power circuits to supply +12V **will instantly destroy the vintage FDC integrated circuit**. -*Note: You can also use my DIY hardware LGT8F328P-based FDC chip emulator instead of a physical 40-pin IC.* +*Note: You can also use my DIY hardware LGT8F328P-based FDC chip emulator instead of a physical 40-pin IC.* [VG93/MB8877/WD1793](https://github.com/Alex-2-Graf/VG93-MB8877-lgt8f328p-emulator) *** ## ⚙ Hardware Configuration Controls ### DIP Switch (TR-DOS Version Selection) -The board features an onboard DIP switch block that allows you to easily multi-boot between four different pre-flashed TR-DOS system firmware versions. Detailed configurations can be inspected [here](https://github.com/Alex-2-Graf/ZX-Spectrum-BDI-TR-DOS-interface). +The board features an onboard DIP switch block that allows you to easily multi-boot between four different pre-flashed TR-DOS system firmware versions. Detailed configurations can be inspected [here](ROM). ### ON/OFF Toggle Switch (TR-DOS Shadow ROM Management) The hardware toggle switch manages the physical mapping logic of the TR-DOS shadow ROM. This toggle is essential to prevent system memory banking conflicts across different computer mainboard models: