Z180 at 33 or 36 MHz and 512KB/1MB RAM plus SD & RTC
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N.B. I consider one of the S/N 68/69 systems to be stolen merchandise. This is a very small cased Z180 system that comes fully assembled and tested with CP/M 2.2. It can be used as-is or as a devel…
Read More…N.B. I consider one of the S/N 68/69 systems to be stolen merchandise.
This is a very small cased Z180 system that comes fully assembled and tested with CP/M 2.2. It can be used as-is or as a development / testing platform for software such as applications and/or operating systems (i.e. ZCPR, CP/M-3, MP/M, etc.). After initialization, this system runs with ZERO memory wait states since each wait state would result in approximately a 25% reduction in effective speed.
Case Size: 50mm x 50mm x 15mm or approximately 2" x 2" x 0.6"
Features:
Included with purchase:
There is an optional USB drive which contains a duplication of the files that are on the FAT32 partition of the SD card. This is for users who may not have an SD card reader on their main computer but it should be noted that this USB drive is NOT supported on the MinZ-C system.
Required:
This system comes assembled and tested since all the components except the reset switch are SMD and construction is more difficult than through-hole projects. The 512KB system is field upgradable to 1MB but requires the new RAM chip's legs to be bent and soldered piggy-back style to the existing SRAM. Due to availability of 33 MHz SMD processors, the installed one may not be a new device but no problems have been encountered with many dozens of them and MANY hours of testing. Likewise the CPLD. It should be noted that every system is tested for at least one full day before any sale.
A 36.864 MHz system is overclocked about 10.6% above the Zilog specifications and many of these systems have been run extensively at this speed with no anomalies being identified. This speed also allows the serial ports to be run at 230400 baud whereas the 33 MHz version is limited to 115200 baud for standard rates. The 33.333 MHz system is in full compliance with all component specifications.
The seller is the original designer / builder of this board and the author of the BIOS. The BIOS incorporates an AUTOEXEC option and it can also be re-assembled and tested as a .COM program without the need to alter or change the flash device.
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Shipping Rate | Tracked | Ships From | First Item | Additional Items |
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John | Aug. 2, 2024
Steve | May 18, 2024
Terry | May 10, 2022
Joey | April 23, 2022
Dale | Aug. 9, 2021
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