As can be seen in the photo, tWO PCB tel minal strips with extra long pins are used to replace the EPROM pins. The battery supply is switched on and c with switch S3: when it is switched, off the content of the RAM is lost, course. Part no.: 40230 Manufacturer: Major Brands Manufacturer no. Before that circuit can be operated S2 must be opened again. IC 2764A-20 EPROM 64K-Bit 200ns CMOS Express ROM Device Programmed & Tested OTP.
Each 2764 has the manufacturers full part number printed on the device. The CORE part number for each device is 2764. The images on the bottom right are close-up views of the first three eprom packages.
When programming has been completed., S2 must be closed and the emulator can then be inserted into its proper place in the circuit. The devices on the top right are 2764 eproms from five different manufacturers. Switch S1must then set to positions ‘program’ again, whereupon the emulator can be programmed in 11 traditional manners. When this routine has been completed, the entire content of the 101- is set to FF-H. The only way the memory can be erased is by placing it in an EPROM programmer, setting the switch S1 to erase and actuating the function ‘Blank Check’ or ‘Read Out’ on the Programmer. When S2 is open, the content of the memory is protected by IC2, T4, and T1. This mode should be selected when it is expected that the circuit will not be used for some time or when it is removed from. When it is closed, the circuit is inactive and the memory cannot be influenced externally: it is then in the standby mode.
It has c64-forth v1 from datatronic on it but I haven't got the faintest clue what it is or does.The position of switch S2 determines whether the circuit is actuated or inactive. The cartridge that holds the two eproms works ok and contains some data aswell. I would really love to make my own cartridge! Is there anyone who can help me get the software? It was bought in 1987 for 215 guilders (about 100 US$)
According to the manual there's a machine language monitor in the software aswell.Įven the original buyers receipt is still in the manual. and to upload/verify the data to/on the eprom.
Self-detecting the devices manufacturers name and the type of IC. 2N4401 DDT - 51 incorporates the world's least 10 uF expensive 2764 EPROM programmer. USB load testing (0 to 10 levels) Interface with PC, laptop or compatibles through USB1.1/2.0 port. This article already has over 7K views and it seems that people are very interested in Willem EPROM Programmer So I’ll give some tips on buying it, one is the official store which is Sivava, a basic pack costs about 50 dollars and the store accepts Paypal and. I have 8 different programmers, and collectively, I can burn nearly 6000 different types of chips. 2764, 27128, 27256, 27512, 27010, Vpp12.5V (21Vpp Modify Circuit) EEPROM. I can program virtually any Eprom (2708 to 27c322), any Bipolar PROM, CPU, PAL, GAL, PIC, etc. The software is needed to set the eprom start and end adresses, select the right voltage, epromtype, program mode (normal or intelligent ( <50 ms program pulses)) etc. At that point, you need an EPROM programmer. Listed here is a subset of Eproms I can program, the full list of devices is quite a bit larger. Under the voltage section there's a mode section with four leds which indicate the supported eproms. Next to that there are 3 leds which indicate the voltage. The programmer has a 28 pin eprom socket but can handle 24 pin eproms aswell. However the software that originally came with the package is missing. Is measures about 3-4v whereas it should be 25. I do not sense any vpp on the supposed pin of the 2532 though.
If youve ever developed code using EPROMs, youll appreciate just how much trouble it is to make a new.
These use vpp25v and the 2532A use 21v vpp. It would be fairly easy to make a 2764 (or other EPROM) programmer using the same code, that project could be a lot simpler if the manual programmer were replaced with just an EPROM zif socket and a programming pulse generator circuit. I have ordered some more 2532 chips to try.
The 2532 can be very tricky to program as I have red in other forums. It came with the original manual and a cartridge with two 2764 eproms on it. The programmer works on all the chips it claims. Some time ago I got a KCS (same manufacturer as the power cartridge) multi programmer EP 64/128 from a friend of mine. I also posted this question in the scene forum but there aren't much people there who can help me.