Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
hi guys!
I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! |
#2
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
JA wrote:
JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! Try googling for 2708's. There is stuff out there, a lot of arcade game sites talk about reading rom images, maybe someone in that field can help out. An old type that might work are the Data I/O models. Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. http://www.dataman.com/eprom-programmer.aspx -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P |
#3
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
JA wrote:
JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! Try googling for 2708's. There is stuff out there, a lot of arcade game sites talk about reading rom images, maybe someone in that field can help out. An old type that might work are the Data I/O models. Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. http://www.dataman.com/eprom-programmer.aspx -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P |
#4
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
"RFI-EMI-GUY" ha scritto nel messaggio ... I need to have an obsolete 2708 eprom programmer-reader.. Try googling for 2708's. Yes i'm doing this in the last 2 months! Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. Exaclty! I'm monitorizing ebay.com ebay.de ebay.fr and ebay.it But no luck, just modern type eprom , from 2716 and up! |
#5
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
JA wrote:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I think Needham's used to make a reasonably priced programmer. You can probably find one on eBay if you watch for a while. -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#6
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
JA wrote:
"RFI-EMI-GUY" ha scritto nel messaggio ... I need to have an obsolete 2708 eprom programmer-reader.. Try googling for 2708's. Yes i'm doing this in the last 2 months! Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. Exaclty! I'm monitorizing ebay.com ebay.de ebay.fr and ebay.it But no luck, just modern type eprom , from 2716 and up! The fifth post here may shed some light on why: http://www.atariage.com/forums/index...owtopic=108781 -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#7
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
"CJT" wrote in message
... JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I think Needham's used to make a reasonably priced programmer. You can probably find one on eBay if you watch for a while. -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . --------------------------------------------------------------------- The Andromeda Research EPROM+ programmer can handle the 2708. Price is reasonable at US $289 plus shipping. http://www.arlabs.com/ It's a versatile unit; handles a pretty good selection of Eproms, Proms, EEproms, Serial EEproms, etc. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Experience: What you get when you don't get what you want |
#8
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
JA wrote: "RFI-EMI-GUY" ha scritto nel messaggio ... I need to have an obsolete 2708 eprom programmer-reader.. Try googling for 2708's. Yes i'm doing this in the last 2 months! Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. Exaclty! I'm monitorizing ebay.com ebay.de ebay.fr and ebay.it But no luck, just modern type eprom , from 2716 and up! Willem might work if you make up an adapter to supply the -5V and translate the pins. You also may be able to adapt a more modern eprom to the task, I've done this with RAM chips, disconnecting the -5V and adding a jumper to make newer 4164 RAM chips work in place of the original chips on Williams game boards. I've adapted Dallas battery backed SRAMs to replace various obsolete writable memory chips too. |
#9
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
CJT wrote: JA wrote: I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I think Needham's used to make a reasonably priced programmer. You can probably find one on eBay if you watch for a while. I have a Needham's PB-10 here. Not sure if it reads 2708s and the Needham's site isn't responding. I haven't got the software installed on this PC but I do have it elsewhere. Graham |
#10
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Jun 4, 9:40�pm, "JA" formula1vhs@ TOGLIMI hotmail.com wrote:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! Can't you just cobble up an adapter to treat your 2708 as if it were a larger memory device. So what if the high read addresses come us as "00" or "FF" Hex. Just edit it with a text editor. Or am I missing something here? -mpm |
#11
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
In article ,
"JA" formula1vhs@ TOGLIMI hotmail.com wrote: "RFI-EMI-GUY" ha scritto nel messaggio ... I need to have an obsolete 2708 eprom programmer-reader.. Try googling for 2708's. Yes i'm doing this in the last 2 months! Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. Exaclty! I'm monitorizing ebay.com ebay.de ebay.fr and ebay.it But no luck, just modern type eprom , from 2716 and up! The pinout is very nearly the same; I don't think it'd be all the difficult to sub in a 2716. Isaac |
#12
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
"JA" formula1vhs@ TOGLIMI hotmail.com wrote in message ... hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! 1. to get the code from the 2708 send it to someone and get the HEX file back, you don't need to buy a vintage programmer then. 2. use a 2716 in an adapter socket to replace it, ground the 2716's highest address pin. Unless you really want to keep it 'vintage'... Arie de Muynck |
#13
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Jun 4, 10:09*pm, "Arie" wrote:
"JA" formula1vhs@ TOGLIMI hotmail.com wrote in t... hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! 1. to get the code from the 2708 send it to someone and get the HEX file back, you don't need to buy a vintage programmer then. 2. use a 2716 in an adapter socket to replace it, ground the 2716's highest address pin. Unless you really want to keep it 'vintage'... Arie de Muynck Better. Put the data in 2 blocks both 0-1K and 1K to 2K so it doesn't matter if the MSB is hi or low. GG |
#14
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
Eeyore wrote: CJT wrote: JA wrote: I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I think Needham's used to make a reasonably priced programmer. You can probably find one on eBay if you watch for a while. I have a Needham's PB-10 here. Not sure if it reads 2708s and the Needham's site isn't responding. I haven't got the software installed on this PC but I do have it elsewhere. It only goes as low as 2716s. Graham |
#15
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
2708
1kx8 EPROM. Requires -5, +5 and +12V. +-----+--+-----+ A7 |1 +--+ 24| VCC A6 |2 23| A8 A5 |3 22| A9 A4 |4 21| VEE A3 |5 20| /CE A2 |6 19| VDD A1 |7 2708 18| PRGM A0 |8 17| D7 D0 |9 16| D6 D1 |10 15| D5 D2 |11 14| D4 GND |12 13| D3 +--------------+ 2716 2kx8 EPROM. +-----+--+-----+ A7 |1 +--+ 24| VCC A6 |2 23| A8 A5 |3 22| A9 A4 |4 21| VPP A3 |5 20| /OE A2 |6 19| A10 A1 |7 2716 18| /CE A0 |8 17| D7 D0 |9 16| D6 D1 |10 15| D5 D2 |11 14| D4 GND |12 13| D3 +--------------+ I remembered this little catch +5,-5,+12V. |
#16
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Jun 4, 9:40 pm, "JA" formula1vhs@ TOGLIMI hotmail.com wrote:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! The 2708 requires two additional supply voltages, +12 and -5 in addition to the +5 required by 2716 onwards. That's probably why most programmers don't support it. Should not be hard to make one though - I made a 2716 programmer in high school, and you could probably do a 2708 if you got the extra voltages. I used an 8255 I/O chip wired into an expansion memory socket on my Z80 computer; but you could also hang the 8255 off a parallel port as an I/O expander. Either that, or get a USB-connected microcontroller with enough I/O pins. For programming you'll need a VPP supply and something that can generate a pulse of the right width - back then I didn't want to trust software timing, today you might. Or you could use a 2716 in an adapter as the replacement and only have to worry about accomplishing the readout. |
#17
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On a sunny day (Thu, 5 Jun 2008 08:22:12 -0700 (PDT)) it happened
wrote in : The 2708 requires two additional supply voltages, +12 and -5 in addition to the +5 required by 2716 onwards. That's probably why most programmers don't support it. Should not be hard to make one though - I made a 2716 programmer in high school, and you could probably do a 2708 if you got the extra voltages. I used an 8255 I/O chip wired into an expansion memory socket on my Z80 computer; Hey, I used 2 Z80 PIOs ;-) |
#18
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
In article "JA" formula1vhs@ TOGLIMI hotmail.com writes:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I have S-100 microcomputers capable of reading and writing 2708s. A couple of them actually boot into monitors stored on 2708s. Not willing to sell, but if you are in the Washington, DC area, I would be happy to dump and/or program some for you. email me if interested. Bill Sudbrink |
#19
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Thu, 05 Jun 2008 01:40:38 GMT, "JA" formula1vhs@ TOGLIMI
hotmail.com wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! The 2708 is similar to larger, newer EPROMs except for the extra supply voltages, for reading. However, IIRC, it uses a different programming algorithm where you are supposed to cycle through the entire memory a number of times. This thing is pretty old, thirty-plus years. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
#20
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
"DaveM" ha scritto nel messaggio . .. The Andromeda Research EPROM+ programmer can handle the 2708. Price is reasonable at US $289 plus shipping. Fantastic work! I have contacted them! I think that i will buy this! |
#21
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
2. use a 2716 in an adapter socket to replace it, ground the 2716's
highest address pin. Unless you really want to keep it 'vintage'... Yes , that's the point, i don't wanna to modify all my equipement! |
#22
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On a sunny day (Thu, 05 Jun 2008 19:00:46 GMT) it happened "JA" formula1vhs@
TOGLIMI hotmail.com wrote in : "DaveM" ha scritto nel messaggio ... The Andromeda Research EPROM+ programmer can handle the 2708. Price is reasonable at US $289 plus shipping. Fantastic work! I have contacted them! I think that i will buy this! Would it not be a lot cheaper to make a little plug in board with for example a 2716? These once existed with SRAM and battery too IIRC. Depends on how many EPROMS of that pre-historic age you need to replace. |
#23
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
Spehro Pefhany wrote:
The 2708 is similar to larger, newer EPROMs except for the extra supply voltages, for reading. However, IIRC, it uses a different programming algorithm where you are supposed to cycle through the entire memory a number of times. The differences between the 2708 EPROM and the next device in the series: 2708 2716 +----\/----+ ---+ 1 |A7 24| VCC | VCC 2 |A6 23| A8 | A8 3 |A5 22| A9 | A9 4 |A4 21| VBB | VPP (-5V on 2708) 5 |A3 20| WE/CS | /OE 6 |A2 19| VDD | A10 (-12V on 2708) 7 |A1 18| VPP | /CE 8 |A0 17| D7 | D7 9 |D0 16| D6 | D6 10 |D1 15| D5 | D5 11 |D2 14| D4 | D4 12 |GND 13| D3 | D3 +----------+ ---+ ASCII pinouts from: http://www.embeddedlinks.com/chipdir/giicm/2716.txt http://www.embeddedlinks.com/chipdir/giicm/2708.txt 2708 2716 +--------\/--------+ +--------------+ 1 -|a7 vcc|- 24 A7 |1 +--+ 24| VCC 2 -|a6 a8|- 23 A6 |2 23| A8 3 -|a5 a9|- 22 A5 |3 22| A9 4 -|a4 vbb|- 21 A4 |4 21| VPP 5 -|a3 we/cs|- 20 A3 |5 20| /OE 6 -|a2 2708 vdd|- 19 A2 |6 19| A10 7 -|a1 program|- 18 A1 |7 2716 18| /CE 8 -|a0 o7|- 17 A0 |8 17| D7 9 -|o0 o6|- 16 D0 |9 16| D6 10 -|o1 o5|- 15 D1 |10 15| D5 11 -|o2 o4|- 14 D2 |11 14| D4 12 -|gnd o3|- 13 GND |12 13| D3 +------------------+ +--------------+ |
#24
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Thu, 05 Jun 2008 01:40:38 +0000, JA wrote:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! Are you stuck with the three-supply 2708? They're a nightmare to program, unless you have the programmer; I wouldn't recommend trying to build one. Why not pick a 1KX8 chip that's a little more modern, like flash? I hear they're relatively easy to program; you could use a bigger one by just ignoring part of the address space. Tood Luck! Rich |
#25
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Thu, 05 Jun 2008 02:17:01 +0000, JA wrote:
"RFI-EMI-GUY" ha scritto nel messaggio ... I need to have an obsolete 2708 eprom programmer-reader.. Try googling for 2708's. Yes i'm doing this in the last 2 months! Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. Exaclty! I'm monitorizing ebay.com ebay.de ebay.fr and ebay.it But no luck, just modern type eprom , from 2716 and up! This doesn't make any sense. Are you _specifying_ a PROM, or are you stuck with the ones you have on hand? Otherwise, why would you want to buy such an old clunker of a chip? School assignment? :- Thanks, Rich |
#26
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
Rich Grise wrote: On Thu, 05 Jun 2008 02:17:01 +0000, JA wrote: "RFI-EMI-GUY" ha scritto nel messaggio ... I need to have an obsolete 2708 eprom programmer-reader.. Try googling for 2708's. Yes i'm doing this in the last 2 months! Also; The Dataman page says theirs do 2708's. Very pricey. I would research all models that claim to do 2708's and go to e-bay and pick up a unit. Exaclty! I'm monitorizing ebay.com ebay.de ebay.fr and ebay.it But no luck, just modern type eprom , from 2716 and up! This doesn't make any sense. Are you _specifying_ a PROM, or are you stuck with the ones you have on hand? Otherwise, why would you want to buy such an old clunker of a chip? School assignment? :- Thanks, Rich He's obviously repairing some piece of old equipment. |
#27
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
CJT wrote:
JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I think Needham's used to make a reasonably priced programmer. You can probably find one on eBay if you watch for a while. I've got an old one (Needham). Where does it have to go to? -- Dirk http://www.transcendence.me.uk/ - Transcendence UK Remote Viewing classes in London |
#28
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
JA wrote:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I have a BK model 840 universal E(E)PROM programmer and external "pod" where the EPROM plugs in. I have the software onmy HD which i can copy to a floppy or CD; i might have the original floppy(ies) but cannot say without looking. You will need an older computer with at least one ISA bus for the card. It is capable of programming a large number of device types made by a goodly number of makers. I have never had any trouble with it and fully expect it to be in brand-new condition, even tho i had used it a number of times. E-mail me if interested. |
#29
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
Robert Baer wrote:
JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I have a BK model 840 universal E(E)PROM programmer and external "pod" where the EPROM plugs in. I have the software onmy HD which i can copy to a floppy or CD; i might have the original floppy(ies) but cannot say without looking. You will need an older computer with at least one ISA bus for the card. It is capable of programming a large number of device types made by a goodly number of makers. I have never had any trouble with it and fully expect it to be in brand-new condition, even tho i had used it a number of times. E-mail me if interested. I would bet he's working on an arcade video game system. They used this eprom as what was called the "personality module" back in the day! |
#30
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
Stephen D. Barnes wrote: Robert Baer wrote: JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I have a BK model 840 universal E(E)PROM programmer and external "pod" where the EPROM plugs in. I have the software onmy HD which i can copy to a floppy or CD; i might have the original floppy(ies) but cannot say without looking. You will need an older computer with at least one ISA bus for the card. It is capable of programming a large number of device types made by a goodly number of makers. I have never had any trouble with it and fully expect it to be in brand-new condition, even tho i had used it a number of times. E-mail me if interested. I would bet he's working on an arcade video game system. They used this eprom as what was called the "personality module" back in the day! I've never heard them called personality modules, just logic boards, game boards, etc. Most classic games were designed on a hardware platform unique to that game, and only a few very early ones used something as old as the 2708. By the the time the arcade boom came along, 2716s, 2732s, and 2764s were dominant. I've got a whole basement full of them and have been repairing them for years so I'm pretty familiar with the hardware. Lots of assorted equipment made in the early to mid 70s used eproms though. Plenty of early mini and microcomputers. |
#31
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Wed, 4 Jun 2008 20:49:25 -0700 (PDT), mpm
wrote: On Jun 4, 9:40?pm, "JA" formula1vhs@ TOGLIMI hotmail.com wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! Can't you just cobble up an adapter to treat your 2708 as if it were a larger memory device. So what if the high read addresses come us as "00" or "FF" Hex. Just edit it with a text editor. Or am I missing something here? -mpm That is one of the few things that will not work, the -5V supply is required. But then, a widget to make a 2708 look like a broken 2716 is possible. |
#32
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
James Sweet wrote:
Stephen D. Barnes wrote: Robert Baer wrote: JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I have a BK model 840 universal E(E)PROM programmer and external "pod" where the EPROM plugs in. I have the software onmy HD which i can copy to a floppy or CD; i might have the original floppy(ies) but cannot say without looking. You will need an older computer with at least one ISA bus for the card. It is capable of programming a large number of device types made by a goodly number of makers. I have never had any trouble with it and fully expect it to be in brand-new condition, even tho i had used it a number of times. E-mail me if interested. I would bet he's working on an arcade video game system. They used this eprom as what was called the "personality module" back in the day! I've never heard them called personality modules, just logic boards, game boards, etc. Most classic games were designed on a hardware platform unique to that game, and only a few very early ones used something as old as the 2708. By the the time the arcade boom came along, 2716s, 2732s, and 2764s were dominant. I've got a whole basement full of them and have been repairing them for years so I'm pretty familiar with the hardware. Lots of assorted equipment made in the early to mid 70s used eproms though. Plenty of early mini and microcomputers. Early Zaccaria pinball machines used five of the 2708 chips and a reference to SOL 20 microcomputer "personality module", in which the 2708 is used can be found here http://www.sol20.org/manuals/sect-iv.pdf. |
#33
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
Stephen D. Barnes wrote: James Sweet wrote: Stephen D. Barnes wrote: Robert Baer wrote: JA wrote: hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! I have a BK model 840 universal E(E)PROM programmer and external "pod" where the EPROM plugs in. I have the software onmy HD which i can copy to a floppy or CD; i might have the original floppy(ies) but cannot say without looking. You will need an older computer with at least one ISA bus for the card. It is capable of programming a large number of device types made by a goodly number of makers. I have never had any trouble with it and fully expect it to be in brand-new condition, even tho i had used it a number of times. E-mail me if interested. I would bet he's working on an arcade video game system. They used this eprom as what was called the "personality module" back in the day! I've never heard them called personality modules, just logic boards, game boards, etc. Most classic games were designed on a hardware platform unique to that game, and only a few very early ones used something as old as the 2708. By the the time the arcade boom came along, 2716s, 2732s, and 2764s were dominant. I've got a whole basement full of them and have been repairing them for years so I'm pretty familiar with the hardware. Lots of assorted equipment made in the early to mid 70s used eproms though. Plenty of early mini and microcomputers. Early Zaccaria pinball machines used five of the 2708 chips and a reference to SOL 20 microcomputer "personality module", in which the 2708 is used can be found here http://www.sol20.org/manuals/sect-iv.pdf. Pinball machines are a different animal, I haven't spent much time working on them, and my only experience is with earlier electromechanical and more recent solid state, never any of the early solid state. |
#34
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
"Bill Sudbrink" ha scritto nel messaggio ... I have S-100 microcomputers capable of reading and writing 2708s. A couple of them actually boot into monitors stored on 2708s. Not willing to sell, but if you are in the Washington, DC area, I would be happy to dump and/or program some for you. email me if interested. Bill Sudbrink Thank you bill! But i'm located in europe!! You're a nice friend! |
#35
Posted to sci.electronics.design,sci.electronics.equipment,sci.electronics.repair
|
|||
|
|||
Please need help about 2708 eprom...
On Jun 4, 6:40*pm, "JA" formula1vhs@ TOGLIMI hotmail.com wrote:
hi guys! I need to have an obsolete 2708 eprom programmer-reader.. It's very difficult to find modern eprom programmers that do this! I have buyed a willeim but it does everithing but 2708!! Well if it's possible i would make one. I'm very good skinned as electronic handy man , but i can't know how to make it. Can someone help me? And if someone got an old eprom programmer let me know! The old Needhams PB10 programmer will work but requires an ISA slot on the computer so newer computers can not be used for the PB10. I ran into a similar situation but was trying to read and program 1702A eproms. I ended up getting a Data I/O model 29B programmer (think the model 22 will work too) on ebay. The programmers were cheap but if getting them on ebay buyer beware. Anyway the Data I/O 29 and 22's will read and program the 2708 and others provided that you have the correct personality module. My 29B has the Unipack which has sevaral different sockets that allow me to read various chips. You have to set up the programmer for the chip you are reading and then put it in the correct socket. If your computer has a serial port then you can upload the hex file for the chip that you just read to your computer and program other chips. If that is not an option then you might read the 2708 then program a newer chip (like a 2716) and then read that on a programmer that does talk to your computer as 2716 programmers were very popular as DIY projects in the late 70's and through the 80's and most programmers read the 2716 and up. I hope that helps. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Eprom help. | Electronics Repair | |||
2708 and 1702 EPROM reader / programmer | Electronics | |||
2532 EPROM to 2732 EPROM | Electronics | |||
Eprom | Electronics Repair | |||
FA: Needham's EMP-20 EPROM Burner / Datarase EPROM Eraser | Electronics |