Search
Search Only:

Search Keyword Z80

Total: 19 results found.

... time.... 5v and 12v power supply regulator outputs were working and the values within tolerances. Tested the Z80 processor with a logic probe which showed no activity on the /MREQ or /IORQ ...
... was having getting the board to reset using the motherboard reset button and had to use creative techniques like grounding the Z80 /RESET pin with a piece of wire.  Interesting! The documentation ...
... is a very good chance that neither will write (or even read) older parts even if the "supported parts list" suggests they will. I ran into this problem with the 2708 EPROM on the Northstar ZPB Z80 ...
... machine. It is in stock Horizon configuration with a ZPB Z80 CPU board, HRAM-64 Dynamic Memory board and MDS Floppy Disk Controller board.  It came with a large pile of manuals with "Anderson Digital ...
... who want to put something into this address block... such as the Z80 Monitor from the Dick Smith System/80 Blue Label) and a PIC microcontroller.   The PIC emulates just enough of a WD1771 ...
A while back I was given a Z80 single board computer by Keith (ZL1BQE) when he found out that I really liked the Z80 microprocessor. The board was made in New Zealand by Computer Specialists Ltd ...
...  I used the same machine SIL strips that I use as sockets for the ROM and Z80.  Inserting these between the SHIM and the PCB sockets worked. The higher socketed chips were well cleared and the ...
... pin header problem was solved using headers from eBay and offsetting the header that connects to the Kaypro PCB socket from the sockets on the shim where the Z80 and 28C256 EEPROM are installed.  ...
... a WD1010 Hard Disk controller + Hard Disk combination.  Western Digital Hard Disk controllers were fairly common in the early 80's with many available as after market additions for the Z80 + CP/M ...
... Model 1 which combined the Z80 /WR, /RD and /IORQ signals to generate /IN and /OUT (and needed to be seperated back to the standard signals by the 26-1132), the System 80 provides the standard signals ...
The TRS-80 Model 4 is regarded by many as one of the pinacles of Z80 development and as a lucky owner of several of these machines I do what I can to keep them operating, to supplement their capabilities ...
12. TRS80 Model 4 Fault
(JAQ/BLOG)
... the power on pins 11 (VCC) and 29 (VSS) of the Z80 (U57).  This read 4.7 volts... a little lower than I expected but was consistent if I powered the main board from either power supply so I assumed ...
... looking machine with the blinking lights and front panel switches.  I wonder what happened to it?   Fast forward to 2012 and having completed the Z80 machine on prototype board I was ...
I have written about my home built Z80 CP/M computer in earlier posts.  Based on a design by Grant Searle (http://searle.hostei.com/grant/cpm/index.html) this fabulous litle machine is easily built ...
... hardware handshake lines such as RTS and CTS. The Z80 single board computer requires RTS handshaking and the initial modules I ordered did not support this.  If you need hardware handshaking ...
The Z80 Single Board Computer is mostly (still needs front panel LED's for power and HDD access) complete and mounted in a Jaycar instrument case. An interesting exercise was creating the ...
Boots CP/M 2.2 off the compact flash card.... 8 x 8mb drives (luxury in 1980). Rather than wire directly to the Compact Flash connector like Grant did on this prototype, I ordered a low cost ...
... size... I built up the Z80 machine described on http://searle.hostei.com/grant/cpm/index.html using parts recycled from some old telephone testing equipment.    ...
... $/altair_sio.c $/altair_cpu.c $/altair_dsk.c \ $/altair_sys.c ALTAIR_OPT = -I $   ALTAIRZ80D = AltairZ80 ALTAIRZ80 = $/altairz80_cpu.c $/altairz80_cpu_nommu.c \ $/altairz80_dsk.c ...

Powered by Easytagcloud v2.1

Contact Andrew Quinn

jaquinn@ihug.co.nz http://twitter.com/jaquinn