From: Sergey Kiselev Date: Wed, 12 Jun 2019 22:17:23 +0000 (-0700) Subject: README: BOM and Changes updates for version 1.1 X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?p=easy_z80.git;a=commitdiff_plain;h=e5268b5178a5b07409893ebb6bd654bfded237a1 README: BOM and Changes updates for version 1.1 --- diff --git a/README.md b/README.md index a939ef7..43bc5e0 100644 --- a/README.md +++ b/README.md @@ -37,6 +37,8 @@ It reuses the same memory paging mechanism I've implemented in Zeta SBC V2. It u ## Hardware Documentation +For the version 1.0 schematic, PCB layout, and bill of materials please refer to [tag v1.0](https://github.com/skiselev/easy_z80/tree/v1.0) + ### Schematic and PCB Layout [Schematic - Version 1.1](KiCad/Easy_Z80-Schematic-1.1.pdf) @@ -157,10 +159,10 @@ Connector | J1 | DC Power Jack, 2mm | 1 Connector | J2, J3 | Sub-D DE9M, Right Angle, PCB mount | 2 | Mouser [806-K22X-E9P-N-99](https://www.mouser.com/ProductDetail/806-K22X-E9P-N-99) Connector | J4 | 2 Pin Header with Friction Lock | 1 | Mouser [571-6404562](https://www.mouser.com/ProductDetail/571-6404562) Pin Header | J5 - J7 | 40x2 Pin Header, 2.54 mm Pitch, Right Angle | 1 | Mouser [571-9-103326-0](https://www.mouser.com/ProductDetail/571-9-103326-0) -Capacitor | C1 - C14, C16 - C23 | 0.1 uF, MLCC, 5 mm Pitch | 22 | Mouser [594-K104K15X7RF53H5](https://www.mouser.com/ProductDetail/594-K104K15X7RF53H5) -Capacitor | C15 | Do not populate | 1 | Do not populate this capacitor +Capacitor | C1 - C14, C16 - C23 | 0.1 uF, MLCC, 5 mm Pitch | 22 | Mouser [594-K104K15X7RF53H5](https://www.mouser.com/ProductDetail/594-K104K15X7RF53H5) Capacitor | C24 | 47 uF, 25V, Aluminum Organic Polymer | 1 | Mouser [80-A750EK476M1EAAE40](https://www.mouser.com/ProductDetail/80-A750EK476M1EAAE40) -Resistor Array | RR1 - RR3 | 4.7 k, bussed, 5 pin SIP | 3 | Mouser [652-4605X-AP1-472LF](https://www.mouser.com/ProductDetail/652-4605X-AP1-472LF) +Resistor Array | RN1 - RN3 | 4.7 k, bussed, 5 pin SIP | 3 | Mouser [652-4605X-AP1-472LF](https://www.mouser.com/ProductDetail/652-4605X-AP1-472LF) +Resistor Array | RN4 | 4.7 k, bussed, 9 pin SIP | 1 | Mouser [652-4609X-AP1-472LF](https://www.mouser.com/ProductDetail/652-4609X-AP1-472LF) Resistor | R1 | 470 ohm, axial | 1 | Mouser [603-MFR-25FBF52-470R](https://www.mouser.com/ProductDetail/603-MFR-25FBF52-470R) Resistor | R2 - R4 | 10 kohm, 1% tolerance, axial | 3 | Mouser [603-MFR-25FRF5210K](https://www.mouser.com/ProductDetail/603-MFR-25FRF5210K) Resistor | R5 | 29.4 kohm, 1% tolerance, axial | 1 | Mouser [603-MFR-25FBF52-29K4](https://www.mouser.com/ProductDetail/603-MFR-25FBF52-29K4) @@ -187,10 +189,11 @@ Easy Z80 uses an ATF16V8/GAL16V8 SPLD (U9) for address decode logic. The [SPLD f ### Changes * Version 1.1 - * Add pull-up resistors on data bus (RN4 - 4.7k) to support interrupt mode 0 + * Add pull-up resistors on the data bus (RN4 - 4.7k) to support Z80 interrupt mode 0 * Use 74HC series instead of 74HCT * Remove C15 - * Fix silkscreen: + * Use RN reference for resistor arrays instead of RR + * Update silkscreen: * Make RN1 reference and value visible * Update silkscreen of headers footprints, so that JP1 and JP2 don't cover the traces * Add project URL to the bottom silkscreen @@ -206,4 +209,5 @@ Easy Z80 uses an ATF16V8/GAL16V8 SPLD (U9) for address decode logic. The [SPLD f * Schematic and top silkscreen: Use 74HC series instead of 74HCT ### Wishlist -* Add pull-ups on the data bus to support extension boards that were not designed for Z80 interrupt mode 2 +* Version 1.0 + * Add pull-ups on the data bus to support extension boards that were not designed for Z80 interrupt mode 2