Z8 Basic Single board computer Rev.06
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The "Z8 Basic Single Board Computer Rev.06" is a further development of the "Z8 Basic Single Board Computer Rev.05".
The following changes/adjustments were made:
The USB interface was pre-equipped in SMD and is expanded with a USB-C socket.
The circuit board can be powered via USB. Can be adjusted via jumpers.
The RAM memories U17 and U3 could already be supplied in Rev.05 via a 2032 battery in the event of a power failure.
In the new version Rev.06, this assembly is SMD and pre-assembled, including battery holder for the 2032 battery.
All other circuit parts are designed as in Rev.05. See current circuit.
Es können zwei Optionen geliefert werden:
Two options can be delivered:
Z8-KIT-SMD-PCB - PCB partially SMD populated.
Z8-KIT.TLW - PCB partially SMD populated, TTL IC - 8 pieces (LS or HCT depending on availability)
3 x 74LS373N ( or HCT )
2 x 74LS368N
2 x 74LS138N
1 x 74LS21N ( or HCT )
12 x 100nF, 47 test points, LED RED, 330R, 33µF capacitor, 5 x jumper, 2x25pol Female Header.
Z8-KIT-Z86C9116PSG-1 :
All components, capacitors, resistors, electrolytic capacitors, LED, TTL, 2x25pol Female Header.
1x circuit board BERT2-06, SMD assembled.
2x 28-pin socket, 1x 24-pin socket, 1x 40-pin socket
Variant with SRAM 6116 and SRAM 62256. 1x Z86C9116PSG
1 x 2764 with monitor, BASIC (Z8671B1-BASIC) and mini assembler.
Without MAX232, DSUB-9 and 5x 1µF
4 x 8Bit - Parallel interfaces are available:
Port A - Z8 Port P2.0 bis P2.7 ( 8 Bit )
Port B - Z8 Port P3.1 bis P3.6 ( 6 Bit )
Port C - SN74LS373N 8Bit Input
Port D - SN74LS373N 8Bit Output
1 xExpansion port for own extensions with data and address bus
and control signals / DS, R / W. see Schematic.
In addition there are chip select signals for the addresses:
0x7000, 0x4000 und 0x3000 put on the expansion port.
The following variants that can be used as a Z8 microcontroller:
Z8671B1-BASIC - Z8 Microcontroller with integrated BASIC interpreter
Z86C9320PSG - Z8 Mikrocontroller ROMless to max 20MHz Clock
Z86C9116PSG - Z8 Mikrocontroller ROMless to max 16MHz Clock
UB8820 with Adapter 2KB EPROM ( Artikel 001631 )
UB8840 with Adapter 4KB EPROM ( Artikel 001631 )
Possible configurations with the corresponding microcontrollers:
Z8671B1-BASIC Mikrocontroller: ( UB8820 with Adapter 2KB EPROM ( Artikel 001631 ) )
U2 - 4KB EPROM 2732 optional with additional monitor program
U3 - 2KB SRAM 6116 required for basic programs
Only one configuration possible:
U7 - 2KB SRAM 6116 optional Jumper W1/W2 auf RAM set or
U7 - 2KB EPROM 2716 Zilog Mini Assembler, Jumper W1 und W2 auf ASM set
Z86C9320PSG Mikrocontroller ROMless
U6 - 8KB EPROM 2764 with BASIC interpreter, monitor program and mini assembler
U3 - 2KB SRAM 6116 required for basic programs and asm programs
Only one configuration possible:
U7 - 2KB SRAM 6116 Jumper W1/W2 auf RAM set or
U17 - 32KB SRAM 62256 (24KB usable) optional
Z86C9116PSG Mikrocontroller ROMless
U6 - 8KB EPROM 2764 with BASIC interpreter, monitor program and mini assembler
U3 - 2KB SRAM 6116 required for basic programs and asm programs
Only one configuration possible:
U7 - 2KB SRAM 6116 Jumper W1/W2 auf RAM set or
U17 - 32KB SRAM 62256 (24KB usable) optional
New basic interpreter for the Z8 with an extended range of functions.
New functions: FOR, NEXT, STEP, ABS, RND, PEEK, POKE, SIZE, WAIT, DELAY, PIN, POUT (PIN, POUT for port input and output)
Existing functions: LIST, RUN, NEW, CLEAR, LET, IF, GOTO, GOSUB, RETURN, REM, INPUT, PRINT, END, USR
BASIC programs can be loaded via the serial interface. (Instructions in the ZIP file)
All other functions are integrated. In the new ZIP there is a short description.
The basic interpreter has a memory size of 4KB.
U3 - 2KB SRAM 6116 must be equipped
U17 - 32KB SRAM 62256 (24KB usable) must be populated
The BASIC interpreter will be further developed.
It is possible to adjust the crystal frequencies in the BIN file. (see description in the ZIP file)
Bert2-Rev06-EPROMs.zip ( Update 09.08.2024 )
SHO Basic Interpreter for Z8.zip ( beta )
SHO Basic Interpreter for Z8 V1.1.zip (Update 20.03.2021 )
BERT2-Rev06-Variant-Z86C9116PSG.pdf ( Kit variant Z8-KIT-Z86C9116PSG-1 )
Bert-2-Rev06.PDF ( Update 08.05.2024 )
The following changes/adjustments were made:
The USB interface was pre-equipped in SMD and is expanded with a USB-C socket.
The circuit board can be powered via USB. Can be adjusted via jumpers.
The RAM memories U17 and U3 could already be supplied in Rev.05 via a 2032 battery in the event of a power failure.
In the new version Rev.06, this assembly is SMD and pre-assembled, including battery holder for the 2032 battery.
All other circuit parts are designed as in Rev.05. See current circuit.
Es können zwei Optionen geliefert werden:
Two options can be delivered:
Z8-KIT-SMD-PCB - PCB partially SMD populated.
Z8-KIT.TLW - PCB partially SMD populated, TTL IC - 8 pieces (LS or HCT depending on availability)
3 x 74LS373N ( or HCT )
2 x 74LS368N
2 x 74LS138N
1 x 74LS21N ( or HCT )
12 x 100nF, 47 test points, LED RED, 330R, 33µF capacitor, 5 x jumper, 2x25pol Female Header.
Z8-KIT-Z86C9116PSG-1 :
All components, capacitors, resistors, electrolytic capacitors, LED, TTL, 2x25pol Female Header.
1x circuit board BERT2-06, SMD assembled.
2x 28-pin socket, 1x 24-pin socket, 1x 40-pin socket
Variant with SRAM 6116 and SRAM 62256. 1x Z86C9116PSG
1 x 2764 with monitor, BASIC (Z8671B1-BASIC) and mini assembler.
Without MAX232, DSUB-9 and 5x 1µF
4 x 8Bit - Parallel interfaces are available:
Port A - Z8 Port P2.0 bis P2.7 ( 8 Bit )
Port B - Z8 Port P3.1 bis P3.6 ( 6 Bit )
Port C - SN74LS373N 8Bit Input
Port D - SN74LS373N 8Bit Output
1 xExpansion port for own extensions with data and address bus
and control signals / DS, R / W. see Schematic.
In addition there are chip select signals for the addresses:
0x7000, 0x4000 und 0x3000 put on the expansion port.
The following variants that can be used as a Z8 microcontroller:
Z8671B1-BASIC - Z8 Microcontroller with integrated BASIC interpreter
Z86C9320PSG - Z8 Mikrocontroller ROMless to max 20MHz Clock
Z86C9116PSG - Z8 Mikrocontroller ROMless to max 16MHz Clock
UB8820 with Adapter 2KB EPROM ( Artikel 001631 )
UB8840 with Adapter 4KB EPROM ( Artikel 001631 )
Possible configurations with the corresponding microcontrollers:
Z8671B1-BASIC Mikrocontroller: ( UB8820 with Adapter 2KB EPROM ( Artikel 001631 ) )
U2 - 4KB EPROM 2732 optional with additional monitor program
U3 - 2KB SRAM 6116 required for basic programs
Only one configuration possible:
U7 - 2KB SRAM 6116 optional Jumper W1/W2 auf RAM set or
U7 - 2KB EPROM 2716 Zilog Mini Assembler, Jumper W1 und W2 auf ASM set
Z86C9320PSG Mikrocontroller ROMless
U6 - 8KB EPROM 2764 with BASIC interpreter, monitor program and mini assembler
U3 - 2KB SRAM 6116 required for basic programs and asm programs
Only one configuration possible:
U7 - 2KB SRAM 6116 Jumper W1/W2 auf RAM set or
U17 - 32KB SRAM 62256 (24KB usable) optional
Z86C9116PSG Mikrocontroller ROMless
U6 - 8KB EPROM 2764 with BASIC interpreter, monitor program and mini assembler
U3 - 2KB SRAM 6116 required for basic programs and asm programs
Only one configuration possible:
U7 - 2KB SRAM 6116 Jumper W1/W2 auf RAM set or
U17 - 32KB SRAM 62256 (24KB usable) optional
New basic interpreter for the Z8 with an extended range of functions.
New functions: FOR, NEXT, STEP, ABS, RND, PEEK, POKE, SIZE, WAIT, DELAY, PIN, POUT (PIN, POUT for port input and output)
Existing functions: LIST, RUN, NEW, CLEAR, LET, IF, GOTO, GOSUB, RETURN, REM, INPUT, PRINT, END, USR
BASIC programs can be loaded via the serial interface. (Instructions in the ZIP file)
All other functions are integrated. In the new ZIP there is a short description.
The basic interpreter has a memory size of 4KB.
U3 - 2KB SRAM 6116 must be equipped
U17 - 32KB SRAM 62256 (24KB usable) must be populated
The BASIC interpreter will be further developed.
It is possible to adjust the crystal frequencies in the BIN file. (see description in the ZIP file)
Bert2-Rev06-EPROMs.zip ( Update 09.08.2024 ) SHO Basic Interpreter for Z8.zip ( beta ) SHO Basic Interpreter for Z8 V1.1.zip (Update 20.03.2021 ) BERT2-Rev06-Variant-Z86C9116PSG.pdf ( Kit variant Z8-KIT-Z86C9116PSG-1 ) Bert-2-Rev06.PDF ( Update 08.05.2024 )
