RM65-2901 PROM Programmer Module

RM65-2901 PROM Programmer Module with replica Adapter Board

 

 

I have an example of this Module though it didn't have the Socket Module with it so I had to make a replica.

 

Here is a copy of the Data Sheet for the Module:

Software

Here is a dump of the on-board ROM (R2926-11) which I have started to disassemble:

The board is located at $7000, the I/O at $7000 and the EPROM from $7100.

 

The PROM Programmer application is executed from $7100 and provides the following single character commands:

R - Read PROM
V - Verify PROM
P - Program PROM
E - Erase EEPROM
C - Checksum PROM
S - Checksum Memory
I - Invert Memory
A - Alter Memory
N - Change PROM Type
? - Display Menu
T - Toggle Verify Mode
X - Exit
L - Load with Offset
D - Dump with Offset
F - ?

Hardware

Here are photos of the two sides of the board: 

RM65-2901 PROM Programmer Module

RM65-2901 PROM Programmer Module Track Side

 

Board Configuration

 

The board has a single bank of DIL switches and a couple of links.

 

The DIL switches set the base address of the ROM and I/O.

 

I haven't worked out exactly what each switch does yet but for normal operation i.e. with the board at $7000 they should be set as follows:

 

(four assign the ROM Base address, five assign the I/O 256 byte page within the ROM range and the remaining switch's are associated with Bank selection)  

 

Switch No. UP (Open) / DOWN (Closed) Function
1 UP TBC
2 UP TBC
3 UP TBC
4 UP TBC
5 DOWN TBC
6 DOWN TBC
7 DOWN TBC
8 UP TBC
9 UP TBC
10 UP TBC

 

The two links configure the ROM (4K, 8K or no ROM), again for normal operation (4K ROM) they should be set as follows:

There is also a trim potentiometer (VR1) which sets the Vpp voltage (measured at the adjacent test point).

 

 

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