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Thread: Anyone savvy with the TL866A Mini pro willing to shed some light?

  1. #1
    Join Date
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    Default Anyone savvy with the TL866A Mini pro willing to shed some light?

    So I have had the TL866A Mini pro programmer for a year and a half now. I primarily use it to test logic chips. I would finally like to get into ROM programming. I have some Apple IIc boards which have the original 255 ROM which is rather limited. After Watching one of Adrian Blacks' newest videos :https://www.youtube.com/watch?v=N8YVX75Qr-0&t=1112s

    He burned a new custom ROM in the video which I would like to give a try. But to be honest I am not entirely sure which eeproms are supported or will work. Right now the only erasable eeproms I have are two JL27C256D (which I took from a non working Zenith board, and four M2764A-2F1 Which I bought new. Problem is when I try to look these up under the chip selection I don't find either.

    I realize I am a complete newb with burning roms so would appreciate any info you all may have on this.
    Last edited by VERAULT; January 31st, 2020 at 07:25 AM.

  2. #2
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    An STMicroelectronics M2764A-2F1 is a fairly common EPROM. I would be surprised by a decent device programmer which doesn't have a programming algorithm for that specific device.

    A JL27C256D is probably a TI TMS27C256 device, which is also a very common EPROM. From the TMS27C256 device datasheet a JL suffix would indicate a ceramic DIP package with an operating temperature range of 0C to 70C.

    I have never used a TL866A. The BP Microsystems device programmers I use will check the JEDEC manufacturer and device codes and give you a warning if you attempt to program a device using a selected programming algorithm that does not match the ID codes of the device. Programming a device with an algorithm for a different device will probably result in a failure.

  3. #3

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    The guys over at the eevblog.com forum know a huge amount.

  4. #4
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    I found that unit to be pretty good although it doesn't do 21 volts for early 2716's. I made an adapter for it so that can.
    I'm pretty sure that the M2764A-2F1 is doable like any other 2716 (EXCEPT THE TI 2716!) at 12.5 volts but no guarantees.

  5. #5

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    Generally speaking, a 27C256 is a 27C256. Doesn't matter which manufacturer

  6. #6
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    Quote Originally Posted by maxtherabbit View Post
    Generally speaking, a 27C256 is a 27C256. Doesn't matter which manufacturer
    So it doesnt matter which vendor I choose under the pull down menu (as long as its the correct # of pins)?

  7. #7
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    Quote Originally Posted by maxtherabbit View Post
    Generally speaking, a 27C256 is a 27C256. Doesn't matter which manufacturer
    YMMV with that.

    My BP Microsystems device programmer certainly has a variety of manufacturer approved programming algorithms for different 27C256 devices. Partial list below:

    Manufacturer: AMD (ID=1h)
    Part Number: Am27C256 (ID=10h)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Atmel
    Part Number: AT27C256
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: Cypress (ID=34h)
    Part Number: CY27C256 (ID=1Ah)
    Algorithm name: Fast (2)
    Pulse width: 200us + x*400us
    Vcc(program): 5
    Vpp(program): 12.5


    Manufacturer: Fairchild (ID=8Fh)
    Part Number: NM27C256 (ID=4h)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Fujitsu
    Part Number: MBM27C256
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*1ms
    Vcc(program): 6
    Vpp(program): 21


    Manufacturer: Fujitsu
    Part Number: MBM27C256A
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: Generic
    Part Number: 27C256 (12.5V)
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: Hitachi (ID=7h)
    Part Number: HN27C256AG/HG (ID=31h)
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: Intel (ID=89h)
    Part Number: 27C256 (ID=8Ch)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Macronix (ID=C2h)
    Part Number: MX27C256 (ID=10h)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Microchip Technology (ID=29h)
    Part Number: 27C256 (ID=8Ch)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.5
    Vpp(program): 13


    Manufacturer: Mitsubishi (ID=1Ch)
    Part Number: M5M27C256P (ID=1h)
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: National Semiconductor (ID=8Fh)
    Part Number: NM27C256 (ID=4h)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: NEC (ID=10h)
    Part Number: uPD27C256 (ID=A4h)
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*1ms
    Vcc(program): 6
    Vpp(program): 21


    Manufacturer: NEC (ID=10h)
    Part Number: uPD27C256A (ID=64h)
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: OKI
    Part Number: MSM27C256
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Philips Semiconductors (ID=15h)
    Part Number: 27C256 (ID=8Ch)
    Algorithm name: Quick Pulse
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Seeq (ID=94h)
    Part Number: 27C256 (ID=C2h)
    Algorithm name: Fast (1)
    Pulse width: 1ms + x*3ms
    Vcc(program): 6
    Vpp(program): 12.5


    Manufacturer: STMicroelectronics (ID=20h)
    Part Number: M27C256B (ID=8Dh)
    Pulse width: 100us
    Vcc(program): 6.25
    Vpp(program): 12.75


    Manufacturer: Texas Instruments (ID=97h)
    Part Number: TMS27C256 (ID=4h)
    Algorithm name: Snap
    Pulse width: 100us + 100us
    Vcc(program): 6.5
    Vpp(program): 13

  8. #8

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    Quote Originally Posted by gslick View Post
    YMMV with that.
    Indeed, that's why I said generally. None of them are going to cause any harm to the chip, it's worth trying in any case if the specific manufacturer isn't listed

  9. #9
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    Well there is no harm in trying. Anyone have any advice for erasing/blanking an eeprom? I dont own a UV erasing device.

  10. #10

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    Quote Originally Posted by VERAULT View Post
    Well there is no harm in trying. Anyone have any advice for erasing/blanking an eeprom? I dont own a UV erasing device.
    https://www.ebay.com/itm/Oral-SteriC...A/324039714370

    2 cycles in this baby does the trick, it can fit about 4-5 ICs at a time

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