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8972385e47
| Author | SHA1 | Date |
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Tom Nisbet
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8972385e47 | |
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Tom Nisbet
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39f9bdf76c | |
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Tom Nisbet
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302c75539c |
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@ -20,6 +20,8 @@ docs:
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url: /docs/prom-specific-code
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- title: "Printed Circuit Board"
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url: /docs/pcb
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- title: "TommyPROM32 PCB"
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url: /docs/tommyprom32-pcb
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- title: "Adding Chip Families"
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url: /docs/extending
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- title: "8755A Hardware"
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@ -30,6 +32,10 @@ docs:
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url: /docs/28C256-notes
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- title: "PROM Types"
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url: /docs/prom-families
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- title: "2316 and 2332 ROMs"
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url: /docs/2316-roms
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- title: "Release History"
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url: /docs/release-history
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- title: "Links"
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children:
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- title: "Code and Schematics"
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@ -129,7 +129,7 @@ For the 2316 make the following connections:
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The 2332 does not have a CS3, and the 2364 does not have CS3 or CS2, so those Arduino pins are not used.
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Before reading the chip, run the Unlock command to scan the Chip Selects. This will try all combinations
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__Before reading the chip, run the Unlock command to scan the Chip Selects__. This will try all combinations
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of CS values to read data from the chip. After the Unlock command runs successfully, the Dump or Read commands
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can then be used to read from the chip.
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@ -4,8 +4,10 @@ permalink: /docs/pcb
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exerpt: "Printed Circuit Boards"
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---
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Although it was originally designed as a one-off programmer to be used on a breadboard,
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there are now some PCB versions.
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Although TommyPROM was originally designed as a one-off programmer to be used on a breadboard, there are now some PCB versions. The original TommyPROM PCB for 28C256 chips is described here, and the [TommyPROM32 PCB](tommyprom32-pcb), for handling a variety of chips, has its own page.
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[](images/TommyPROM-pcb.jpg)[](images/TommyPROM32-SST39SF.jpg)
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## 28C256 PCB
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@ -17,54 +19,6 @@ disturbing any of the wires.
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The [KiCad design files](https://github.com/TomNisbet/TommyPROM/tree/master/schematics)
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are in the project repo.
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[](images/TommyPROM-pcb.jpg)
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[](images/TommyPROM-pcb-with-microcode.jpg)
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## TommyPROM32
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TommyPROM32 was built to support SST39SF0x0 and other 32-pin EEPROM and Flash chips. While
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providing a stable platform for the SST39SF chips, the board can serve as a test bed for
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other chips as well. It uses a set of headers that allow any of the signals to the target
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chip to be re-routed. The default configuration, with just jumper shunts installed, is
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wired for the SST39SF0x0 chips.
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[](images/TommyPROM32-SST39SF.jpg)
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Many other chips, particularly if they follow JEDEC standards, can be supported by
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removing shunts and adding just a few jumper wires.
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Chips with fewer pins can also be supported. There are power pins in place to support
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28-pin and 24-pin chips with a shunt to the correct VCC pin. The photo below shows the
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28C256 with a power jumper on pin 28, the _WE_ signal moved down to pin 27, and the _A14_
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signal moved from ping 27 to pin 1.
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[](images/TommyPROM32-28C256.jpg)
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Power inputs and a switch are provided to support older flash and EEPROM chips that need
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higher programming voltages. Many of these chips just need a higher voltage, like 12V,
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applied to the VPP pin continuously during the programing and verification cycle. In
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normal operation, the 5V VCC signal is applied to the VPP pin. The board has VPP inputs
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for two voltages. Applying 12V to _VPP In High_ and 5V to _VPP In Low_ lets the VPP
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output be switched between these two voltages using a manual slide switch for programming.
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The photo below shows the WE27C257 set up for programming. The _VPP in Low_ signal is
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connected to _VCC_ and the _VPP in High_ signal is using 12V from an external power
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supply. The _VPP Out_ signal is connected to the chip's VPP on pin 1. The chip is in
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programming mode when the slide switch is set to the _High_ position and is in read mode
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when in the _Low_ position.
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[](images/TommyPROM32-27C257-pgm.jpg)
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To erase the WE27C257 chip, the external power supply is providing 14V and the _VPP Out_
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is connected to the chip's _VPP_ and _A9_ pins. An external breadboard was needed to
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allow the _VPP Out_ signal to be connected to multiple pins. A new spin of the board is
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planned with multiple _VPP Output_ pins and some general-purpose interconnect pins.
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[](images/TommyPROM32-27C257-erase.jpg)
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For chips that require a high voltage VPP pulse during programming, some external
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switching circuitry will be needed to allow the Arduino to control the VPP voltage. There
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is a header connected to the unused D13 pin that can support this. See the
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[Intel 8755 version of the hardware](hardware/#intel-8755a-hardware-version) for an
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example of voltage switching by TommyPROM.
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[](images/TommyPROM32-sch.png)
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[](images/TommyPROM-nano-sch.png)
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@ -0,0 +1,59 @@
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---
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title: TommyPROM32 PCB
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permalink: /docs/tommyprom32-pcb
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exerpt: "TommyPROM32 Printed Circuit Board"
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---
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## TommyPROM32
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The TommyPROM32 PCB supports 32-pin and smaller EEPROM and Flash chips. The board can be easily configured for many 32, 28, or 24 pin chips or used in its default setup for SST39SF devices. The board has a set of headers that allow any of the signals to the target chip to be re-routed.
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[](images/TommyPROM32-jumpers.jpg)
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The default configuration and labels, with just jumper shunts (jumper caps) installed, is wired for the SST39SF0x0 chips.
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[](images/TommyPROM32-SST39SF.jpg)
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Many other chips, particularly if they follow JEDEC standards, can be supported by removing shunts and adding just a few jumper wires.
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If the board is only being used with 5V chips or used to read (but not program) other chips, then the Vpp switches, diodes, and other components on the lower right side of the board do not need to be installed.
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There are power pins in place to support 28-pin and 24-pin chips with a shunt to the correct _VCC_ pin. The photo below shows the 28C256 with a power jumper on pin 28, the _WE_ signal moved down to pin 27, and the _A14_ signal moved from pin 27 to pin 1.
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[](images/TommyPROM32-28C256.jpg)
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## Vpp Power Selection Examples
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Two power inputs and switches are provided to support older flash and EEPROM chips that need higher programming voltages. Many of these chips just need a higher voltage, like 12V, applied to the VPP pin continuously during the programing and verification cycle. In normal operation, the 5V _VCC_ signal is applied to the _VPP_ pin. The board has VPP inputs for two voltages. Applying 12V to _VPP In High_ and 5V to _VPP In Low_ lets the VPP output be switched between these two voltages using a manual slide switch for programming.
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Note that some of the photos below show the initial version of the TommyPROM32 board that only contained a single switchable voltage. The version 2.0 boards added a second switchable Vpp voltage section with multiple _VPP Output_ pins. The _5V_ and _Vpp in low_ pins are now adjacent so that a wire is not needed for the common case where Vpp low is set to 5V. There are also some general-purpose 5v, GND, and interconnect pins.
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### WE27C257
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The photo below shows the WE27C257 set up for programming. The _VPP in Low_ signal is connected to _VCC_ and the _VPP in High_ signal is using 12V from an external power supply. The _VPP Out_ signal is connected to the chip's VPP on pin 1. The chip is in programming mode when the slide switch is set to the _High_ position and is in read mode when in the _Low_ position.
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[](images/TommyPROM32-27C257-pgm.jpg)
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To erase the WE27C257 chip, the external power supply is providing 14V and the _VPP Out_ is connected to the chip's _VPP_ and _A9_ pins.
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Note the the top picture showed the version 1.0 board and a jumper wire was needed to connect +5V to the _Vpp in low_ pin. The newer board, shown below, has a jumper cap to make this connection, so no additional wire is needed.
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[](images/TommyPROM32-27C257-erase.jpg)
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### M27C256
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The M27C256 chip needs two voltages for programming. The external power supply is providing 12.75V to _VPP Out 1_ for the the chip's _Vpp_ and _A9_ pins. The power supply is also providing 6.25V to _VPP Out 2_ for the chips _Vcc_. Note the the chip's _Vcc_ is no longer connected to the system +5V. The two _VPP Select_ switches should be in the _low_ position for normal read operation and in the _high_ position for programming.
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[](images/TommyPROM32-27C256.jpg)
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## High Voltage Pulses
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For chips that require a high voltage _Vpp_ pulse during programming, some external switching circuitry will be needed to allow the Arduino to control the VPP voltage. There is a header connected to the unused _D13_ pin that can support this. See the [Intel 8755 version of the hardware](hardware/#intel-8755a-hardware-version) for an example of voltage switching by TommyPROM.
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## Schematics and Gerbers
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The [TomyPROM32 KiCad design files](https://github.com/TomNisbet/TommyPROM/tree/master/schematics)
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are in the project repo.
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[](images/TommyPROM32-sch.png)
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@ -12,13 +12,15 @@ The 2316 is a 2Kx8 mask-programmable ROM made by Commodore. Intel made a versio
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The 2316, 2332 and 2364 ROMs are somewhat unique because they have Chip Select signals that are configured when the data is mask-programmed. Manufacturers could order a 2316 configured with any of its three Chip Select signals as either active-high or active-low.
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This causes a bit of confusion, because the datasheets state that the chips are compatible with standard EPROMs, but they should really state that the chips __can be__ compatible, depending on the configuration selected. For example, a 2316 is only compatible with a 2716 if the 2316 was manufactured with *CS1* and *CS2* configured active-low and *CS3* configured active-high. Otherwise, some signals will need to be inverted to swap out a 23 serial chip with a more standard EPROM.
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This causes a bit of confusion, because the datasheets state that the chips are compatible with standard EPROMs, but they should really state that the chips __can be__ compatible, depending on the configuration selected. For example, a 2316 is only compatible with a 2716 EPROM if the 2316 was manufactured with *CS1* and *CS2* configured active-low and *CS3* configured active-high. Otherwise, some signals will need to be inverted to swap out a 23 series chip with a more standard EPROM.
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Some systems will contain multiple 23xx chips with the Chip Selects configured the same and others will configure each chip differently. For example, some 8K Atari cartridges use two 2332 chips and will invert one of the Chip Selects so that either chip can be selected with a single address line to differentiate them. If the chips are removed from the cartridge, they would need different Chip Selecct wiring to read their data.
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Some systems contain multiple 23xx chips with the Chip Selects configured the same and others will configure each chip differently. For example, the OSI SuperBoard contains five 2316s and they are all configured with the CS1, CS2, and CS3 lines active-high. On the other hand, some 8K Atari cartridges use two 2332 chips and will invert one of the Chip Selects so that either chip can be selected with a single address line to differentiate them. If the chips are removed from the cartridge, they would need different Chip Select values to read their data.
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## Reading 23xx chips with TommyPROM
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A TommyPROM programmer can be constructed with an Arduino to read 2316 ROM chips. The code will scan the ROM to determine the correct Chip Select settings, so no wiring changes or inverters are needed when switching chips of the same type.
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A TommyPROM programmer can be built with an Arduino to read 2316 ROM chips. This can be constructed on a breadboard for quick use. The [TommyPROM32 printed circuit board](tommyprom32-pcb) version can also be used for a more permanent solution.
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The TommyPROM code will scan the ROM to determine the correct Chip Select settings, so no wiring changes or inverters are needed when switching chips of the same type.
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To use TommyPROM with 2316 chips, perform the following steps:
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@ -38,7 +40,13 @@ The 2332 only has two chip selects, so pin 21 should instead be connected to the
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|Model |Type |CS3 |CS2 |CS1 |Tested|Notes|
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|:--- |:--- |:---:|:---:|:---:|:---:|:--- |
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|**UK101**|||
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|**Ohio Scientific SuperBoard**|||
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|Monitor |2316 | x | H | H | Y |
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|BASIC1 |2316 | x | H | H | Y |
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|BASIC2 |2316 | x | H | H | Y |
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|BASIC3 |2316 | x | H | H | Y |
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|BASIC4 |2316 | x | H | H | Y |
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|**Compukit UK101**|||
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|MONUK02 |2316 | x | H | H | Y |
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|BASUK01 |2316 | x | H | H | Y |
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|BASUK02 |2316 | x | H | H | Y |
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@ -47,21 +55,22 @@ The 2332 only has two chip selects, so pin 21 should instead be connected to the
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|**Commodore 64**|||
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|901225-01 |2332 | - | | | N | Character ROM
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|901226-01 |2364 | - | - | | N | Basic
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|901227-03 |2364 | - | - | | N | Kernel
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|901227-03 |2364 | - | - | | N | Kernal
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|**Commodore VIC 20**|||
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|901460-03 |2332 | - | L | L | N | Character ROM
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|901486-01 |2364 | - | - | | N | Basic
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|901486-06 |2364 | - | - | | N | Kernel
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|901486-06 |2364 | - | - | | N | Kernal
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|**Commodore 1451**|||
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|325302-01 |2364 | - | - | | N | DOS
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|901229-05 |2364 | - | - | | N | Kernel
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|901229-05 |2364 | - | - | | N | Kernal
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|**TRS-80 Model 1**|||
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|ROM A |2364 | - | - | | N|
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|ROM B |2332 | - | | | N|
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|**Apple II**|||
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|**Ohio Scientific SuperBoard**|||
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||2316||
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|**Atari 400 and 800**|||
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|**Atari 2600 Cartridge**|||
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|ROM A |2332 | - | | | N|
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|ROM B |2332 | - | | | N|
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## References
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@ -0,0 +1,34 @@
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---
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title: TommyPROM Release History
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permalink: /docs/release-history
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exerpt: "What's New in TommyPROM"
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---
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## TommyPROM Release History
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|Revision |Date_added |Notes|
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|:---: |:---: |:--- |
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|1.0 |2017-02-27 |Initial version to support 28C256 EEPROMs|
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|1.5 |2018-05-10 |Split into modular PromDevice drivers to support 8655A|
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|1.6 |2018-12-22 |Early suport for 27C devices |
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|1.7 |2019-06-08 |Add Lock command for 28C256 |
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|1.8 |2019-06-09 |Optimize address register code to meet unlock timing requirements and create HardwareVerify sketch|
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|2.0 |2019-07-19 |Extend addressing to 19 bits to read larger chips, like the 29C040|
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| |2020-08-08 |Add dedicated sketch to unlock 28C256 chips using Ben Eater hardware design|
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|2.1 |2020-08-15 |Add Poke command|
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|2.2 |2020-08-24 |Add support for 74LS595 shift registers for addressing and fix XModem ACK issue|
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|2.3 |2020-08-26 |Fix addressing bug|
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|2.4 |2020-10-10 |Add XModem debugging information and fix #17 for AT28C256 write failures|
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|2.5 |2020-10-14 |Change XModem default to 8-bit checksum instead of CRC16|
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|2.6 |2020-11-11 |Change XModem default back to CRC16|
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|2.7 |2020-11-14 |Additional XModem protocol error handling|
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|3.0 |2021-08-12 |Support for SST39SF0x0 flash devices|
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|3.1 |2022-12-10 |Support for 27C257/27E257 EEPROM|
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|3.2 |2022-12-13 |Support for SST28SF flash|
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|3.3 |2022-12-14 |Support 29C0x0 flash|
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| |2022-12-23 |Documentation for TommyPROM32 PCB|
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|3.4 |2024-04-09 |Support 2316,2332, and 2364 mask-programmed ROMs|
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|3.5 |2024-04-12 |jcranes's updates to CLI for better parameter defaults and additional error checking.|
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