Description
GE General Electric Technical Specifications: IS200MVRPH1A
The memory IS200MVRPH1A map PROM (U14) contains eight memory
configuration maps. As the chart in Figure 8 indicates,
resolution of the maps is 2K blocks. The numbers enclosed
in brackets [ ], represent BYTEWYDE IS200MVRPH1A memory sockets on
board as shown in Figure 5. The memory installed may be
either RAM or ROM. The indication (RAM) represents off
board RAM.
If bank switching is desired, the section entitled MULTIPLE
MEMORY BANK OPERATION describes the use of jumper
J4 and the various memory maps in obtaining this.
| brand | Product Name | Product model | Order No |
| GE Fanuc | Module card | IS200MVRPH1A | nothing |
| Place of Origin | Marketable land | Imported or not | defects liability period |
| Europe and America | Nationwide and overseas | yes | a year |
| Place of shipment | Delivery method | How to use | Applicable industries |
| Xiamen | Shunfeng Express | Commissioning and installation | Power Plant Steel Plant Cement Plant Shipboard Papermaking |
| Service advantages | Foreign import, goods preparation and supply | Reasonable price and reliable quality | Pictures are for reference only |
| Product features | Primary source of goods, supply by model | After sales guarantee | Chen 1810693-7731 |
The IS200MVRPH1A MDX-CPU4 supports a memory bank switching
operation wi:lich aUows memory expansion beyond the
normal 64K byte limitation of the Z80.
There are two basic schemes of bank switching available.
One method requires removal of jumper J4. With J4
removed, write a select byte to port FFH as shown in Figure
- This sel.ects one of eight different banks and utilizes
memory maps 4,;5: and 6 (see Figure 8). This does not take
advantage of any CPU4 IS200MVRPH1A memory except the bootup PROM.
The alternative scheme .Ieaves jl,lmper J4 in position and
has the PROM in socket fbe a combination bootup PROM
and kernel. After power-up, a 07H written to port FFH
allows the user to have his kernel on CPU4 and do bank
switching via any port except FFH.
PROGRAMMABLE LED
An LED is available to be programmed on/off at bit 04 (1 X)
of port FFH. This may be used as a visual selftest indicatoror
other appropriate user fU,nctions. This. bit is also used inthe
memory bank switching mode and the indicator’ will
illuminate when addressing bank 4.
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