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-
- --- In swpb@yahoogroups.com, "Ksarul" <vze23g4a@...> wrote:
-
- Here it is again. I posted this once before.
-
- Here's the list of components:
-
- I bought mine from Unicorn Electronics, as they had the best prices
- overall.
-
- www.unicornelectronics.com
-
- You need the following components and sockets:
-
- Item Quantity P/N
-
- 14 pin socket 5 each MT14
- 16 pin socket 2 each MT16
- 20 pin socket 5 each MT20
- 32 pin socket 2 each MT32
- 40 pin socket 1 each MT40
- +5V Regulator, 1 Amp 1 each 7805T
- .1mf 50V monolithic cap 4 each CPM.150
- 100mf 16V radial electrolytic cap 1 each CPE10016
- 47mf 16V radial electrolytic cap 1 each CPE4716
- Memory Mapper Chip 1 each 74HCT612
- Octal Bus Transceiver 1 each 74HCT245
- 8-bit Magnitude Comparator 1 each 74HCT688
- Octal Driver 3 each 74HCT244
- Quad 2-input AND Gate 1 each 74HCT08
- 8-bit Addressable Latch 1 each 74HCT259
-
- Hex Inverter 1 each 74HCT04
- Quad 2-input OR Gate 1 each 74HCT32
- 3 to 8-line Decoder/De-multiplexer 1 each 74HCT138
- Quad Bus Buffer Gate 1 each 74HCT125
-
- Note also that C-1 is the 47mf cap and that C-3 is the 100mf cap,
- and that the four .1mf caps are not marked--you just have to find their pad
- pairs.
-
- It is best to use a photo of a completed card to see where those
- four are.
-
- Choose your memory chips separately, either 128K or 512K, I didn't
- list those above.
-
- Jim Fetzner
-
- ==
-
- James M. Postle, Sr.
- Voltage is just as important for the Capacitors as is their value and
- type. The C-1 -- "If" handling the input voltage (17 Volts) should
- be 35 Volts. The C-2 is working with 5 Volts, then a 10 Volt device
- would work. There are different types of capacitors. And... That
- should be specifide in the parts list as well. That would include
- the .1mf filters. Four, I think. Or... A part number would work as
- well.
-
- So this list is not totally complete as posted.
-
-
- NOTE:
-
- 1. that C-1 is the 47mf cap and;
- 2. that C-3 is the 100mf cap, and;
- 3. that the four .1mf caps are not marked--you just have to find
- their pad pairs.
-
- ====
-
- Richard Bell Adds:
- Some thoughts;
-
- Caps should be 35 v rated and a few should be tantalum instead of
- electrolytic (Especially if the LED circuit is added.).
- Machine sockets should be used instead of the cheaper "slide" type.
- To really make this card shine, memory chips should be the 55 nano second
- speed (Also, either the simple P-Box interface card upgrade of replacing the
- 74LS244 chips with 74HCT244 chips and installing new 35 v rated electrolytics or
- Thierry's P-Box wait state reduction mod will help performance).
- Someone should make up disks of all the Bruce Harrison software that was
- written for this card for a demonstration that will dazzle even the most
- hardened TIer so it can be included in the package.
-
-