文档预览： This chip is UPSIDE- DOWN in comparison to IC U6 and it is a 74LS138 (since these are very ... Connect to pin #9 on this IC (74LS138) for address $DE00. ... 点击下载

文档预览： ... List of needed items: chips: 1 * 74LS138 4 * 74LS574 resistors: 36 * 1.2 kOhm 28 * 2.4 kOhm capacitors: 4 * 100-220 nF To pins of chip 74LS138 you must ... 点击下载

文档预览： You could also use two common 28-pin DIP sockets provided they have cutouts on the bottom to allow for components underneath the socket (i.e. the 74LS138). ... 点击下载

文档预览： 74LS138. | | |. |------|3,4,8 |. IO PORT= | | |--------|. ... |---|A 74LS138 V6 |----| |. | | | | |. | | | B C C2A C2B C1 V7 | |. ... 点击下载

文档预览： 2) Obtain the parts: Two 74LS138 (3 to 8 line decoder) One 6264 (8k static ... IC1, a 74LS138 pin 1 A14 16 +5 volts 2 A15 15 3 Ground 14 4 Ground 13 6264 ... 点击下载

文档预览： The parts are: U1: A PIC16F84, the famous single-chip controller by Microchip, which is the core of this device; U2: A 74LS138, which is a 3-to-8 decoder, ... 点击下载

文档预览： XL-modification: Cut pin 10 of 74LS08 (three chips below the 74LS138) directly above the PCB and bend it up, so it lies on the chip. ... 点击下载

文档预览： Memory-mapping hardware consists of eleven chips: 74LS273, 74LS32 x 2, 74LS175 x 2, 74LS138 x 2, 74LS30, 74HC08, 74HC04 and a 4053. ... 点击下载

文档预览： ... 74LS125 E1 1.12 Tri-state quad buffer 74LS138 B5 1.22 Expandable 3/8 Encoder 74LS154 C10 2.80 4-16 decoder/multiplexer 74LS166 F5 1.84 8-bit serial in, ... 点击下载

文档预览： I did get the tip that I should replace the 74LS138 with a 74F138. I'll try that one after I fix the Stabilizer thing. On my 800XE (in Germany the 800XL was the most ... 点击下载