WP-2: Difference between revisions

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*128K: 128Kx8 parallel SRAM, 5v, low power, DIP-32
*128K: 128Kx8 parallel SRAM, 5v, low power, DIP-32
Many different chips are compatible. Here are just a few for example & reference: 
:[https://www.futurlec.com/Memory/628128pr.shtml Hitachi HM628128LP]
:[https://www.futurlec.com/Memory/628128pr.shtml Hitachi HM628128LP]
:[https://www.digikey.com/product-detail/en/AS6C1008-55PCN/1450-1017-ND/  Alliance AS6C1008] or [https://www.mouser.com/ProductDetail/Alliance-Memory/AS6C1008-55PCN from Mouser]
:(best battery life) Alliance AS6C1008-55PCN [https://www.digikey.com/product-detail/en/AS6C1008-55PCN/1450-1017-ND/  from DigiKey] or [https://www.mouser.com/ProductDetail/Alliance-Memory/AS6C1008-55PCN from Mouser]
:[https://ebay.com/sch/i.html?_nkw=IS62C1024LL-70W ICSI IS62C1024LL-70W] also LL or L, 70 or 55
:[https://ebay.com/sch/i.html?_nkw=IS62C1024LL-70W ICSI IS62C1024LL-70W] also LL or L, 70 or 55
:[https://ebay.com/sch/i.html?_nkw=BS62LV1024PC-70 BSI BS62LV1024PC-70] also 1025 or 1027 or 1028, PC or PI, 70 or 55
:[https://ebay.com/sch/i.html?_nkw=BS62LV1024PC-70 BSI BS62LV1024PC-70] also 1025 or 1027 or 1028, PC or PI, 70 or 55
:Toshiba TC551001CP-70L
:AMIC LP621024D-70LL
:Goldstar GM76C8128
:Samsung KM681000BLP-7L
:ASI MT5C1008CW-70L/883C


These do not come in a DIP package, but would also work with a simple adapter pcb:
 
The following do not come in a DIP package, but for future reference would also work with a simple adapter pcb:
:Cypress CY62128E
:Cypress CY62128E
:ISSI IS62C1024AL / IS65C1024AL
:ISSI IS62C1024AL / IS65C1024AL
Generic ebay search for the type of chip, not a particular part number:<br>
https://ebay.com/sch/i.html?_nkw=128Kx8+sram+dip+32


==Expansion Card==
==Expansion Card==

Revision as of 12:32, 18 November 2020

Manuals

https://archive.org/search.php?query=Tandy%20WP-2

RAM Disk

Battery-backed SRAM powered by the wall power when present, the AA batteries when wall power is absent, and the CR2430 coin cell when wall power and AA batteries are absent.

Internal ram upgrade socket can take a single chip, either 32K or 128K.

  • 32K: 32Kx8 parallel SRAM, 5v, low power, DIP-28
  • 128K: 128Kx8 parallel SRAM, 5v, low power, DIP-32

Many different chips are compatible. Here are just a few for example & reference:

Hitachi HM628128LP
(best battery life) Alliance AS6C1008-55PCN from DigiKey or from Mouser
ICSI IS62C1024LL-70W also LL or L, 70 or 55
BSI BS62LV1024PC-70 also 1025 or 1027 or 1028, PC or PI, 70 or 55
Toshiba TC551001CP-70L
AMIC LP621024D-70LL
Goldstar GM76C8128
Samsung KM681000BLP-7L
ASI MT5C1008CW-70L/883C


The following do not come in a DIP package, but for future reference would also work with a simple adapter pcb:

Cypress CY62128E
ISSI IS62C1024AL / IS65C1024AL

Generic ebay search for the type of chip, not a particular part number:
https://ebay.com/sch/i.html?_nkw=128Kx8+sram+dip+32

Expansion Card

Original

DIY

RAM Card


ROM Card

https://github.com/bkw777/WP-2_IC_Card

References / notes

http://randomvariations.com/wp-content/uploads/2014/09/IMG_8920_wp2_zork1.jpg
Toshiba Memory Card / IC Card
32K, 64K, or 128K RAM card
32K, 64K, 128K, or 256K ROM card

Connector that fits the Expansion port:

Similar to PC-Card/Cardbus/PCMCIA, but thinner with a single row of pins instead of two rows of pins.
38 pins, single row, 1.27mm pitch
Card main body 3.2mm thick x 54mm wide
File:JC20-B38S-F1.pdf
JAE JC20-B38S-F1-A1 0.29mm-0.45mm pcb, centered, https://www.asapaog.com/rfq/japan-aviation-electronics/jc20-b38s-f1-a1/
JAE JC20-B38S-F2-A1 0.5mm pcb, offset
JAE JC20-B38S-F3-A1 0.2mm pcb, offset

Memory Battery

CR2430

Binary Apps

See the Service Manual pages 4-16 and D-1.

CamelForth FORTH Interpreter

ZXZVM Infocom Z-Machine Interpreter