- #27C801 EPROM PROGRAMMER SERIAL#
- #27C801 EPROM PROGRAMMER UPDATE#
- #27C801 EPROM PROGRAMMER DRIVER#
- #27C801 EPROM PROGRAMMER SOFTWARE#
#27C801 EPROM PROGRAMMER SOFTWARE#
The schematic for the EPROM program is available here and the software for controlling it may be downloaded from here (C, Linux). You cannot write to the DType latch while the EPROM is selected and its output is enabled as this produces contention for the data lines D0.D7. My design builds on the 27C801 design by adding an 8bit octal D-Type latch to provide an additional 8 control lines, a switchable 5v/6.25v EPROM VCC supply, decoding logic to route A14, CE and PRG appropriately depending on the EPROM being used, and careful choice of signal derived from the parallel port control lines (4 of them) so that the EPROM may be switched into verify mode and back again quickly during programming. These three EPROMs have slightly different pin-outs with repsect to ~CE, ~PRG and A14 (see here for pinouts), and require 6.00-6.25v supply in addition to 12.75v VPP when in programming mode. What I need is something that will program 27C64, 27C128 and 27C256 EPROMs, with the correct supply and program voltages. The disadvantage of this design is that will only program the 27C801 device. A quick search on the internet shows a couple of similar programmer designs, in particular theĢ7C801 Programmer (which references this site) uses an on-board counter to generate the address bus values during programming, and runs of a PC parallel port.
Having the programmer hardware generate its own incremental address on the address bus would solve this problem.
#27C801 EPROM PROGRAMMER DRIVER#
Below OBD2Tuning sharing T op2011 programmer device list TOP2011 universal programmer driver download. Top2011 programmer support 2.56.5V device. TOP2011 universal programmer package with top 2011 universal programmer software and Top2011 driver. In revisiting my earlier EPROM programmer designs I realised that setting up each address location required a number of writes to the 8225A I/O controller, and the decoding was such that implementing any of the rapid programming algorithms would be difficult (the control pin access was not flexible enough). Top2011 programmer is Topwin universal USB bios Programmer. You can also place OEM orders along with customized packaging as well.CEProg - EPROM Programmer v2 Feb 10, 2007 These products are ISO, CE, SGS certified that also gives peace of mind in terms of authenticity. It is compliant with all types of Operating Systems and can help you monitor records too.Ī can offer you a plethora of otp eprom that will help you save money on the purchase.
#27C801 EPROM PROGRAMMER UPDATE#
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#27C801 EPROM PROGRAMMER SERIAL#
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