CompuPro Godbout RAM 21 128K RAM Board S - 100 Computers
Item History & Price
| Reference Number: Avaluer:7039485 | Compatible Brand: George Morrow Altair IMSAI Cromemco |
| MPN: RAM21 | Type: RAM BOARD |
| Brand: Compurpro |
CompuPro Godbout RAM 21 128K RAM S-100 Computers. Untested and selling as-is.
The RAM-21 uses sixty-four high performance 16K X 1 MOS RAM chips to provide a total of 128K bytes or 64K words of storage. The RAM- 21 was addressable on any 128K byte boundary in the 16 megabyte address space specified by the IEEE 696 standard. The RAM-21 also dynamically switched between "byte-wide" or "word-wide" modes per the state of the sXTRQ* signal... on the S-100 Bus. The board was designed to work with 8086/88 type processors at speeds exceeding 10 MHz. It also handles DMA flawlessly, a feature few boards could do at those speeds. To reduce the number of support ICs required to pack all this functionality and capacity onto a standard height S-100 board, a PAL (programmable-array-logic) element is used. The PAL selects the proper memory chips and controls the complicated data bus switching scheme required to mix 8 and 16 bit operations.
The RAM-21 uses sixty-four high performance 16K X 1 MOS RAM chips to provide a total of 128K bytes or 64K words of storage. The RAM- 21 was addressable on any 128K byte boundary in the 16 megabyte address space specified by the IEEE 696 standard. The RAM-21 also dynamically switched between "byte-wide" or "word-wide" modes per the state of the sXTRQ* signal... on the S-100 Bus. The board was designed to work with 8086/88 type processors at speeds exceeding 10 MHz. It also handles DMA flawlessly, a feature few boards could do at those speeds. To reduce the number of support ICs required to pack all this functionality and capacity onto a standard height S-100 board, a PAL (programmable-array-logic) element is used. The PAL selects the proper memory chips and controls the complicated data bus switching scheme required to mix 8 and 16 bit operations.
