Timeline for Need circuit - manual step-by-step clock for 8086/8088
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 22, 2019 at 8:54 | comment | added | Michael Karcher | Your idea needs the 8086 in minimum mode, a tristate driver (16 bit, so two chips) gated by /RD to provide the fake RAM, a latch gated by /WR to latch data written. You could use the instruction sequence "SAHF / OUT DX,AL" which just takes two bytes, and outputs 02h. We don't know DX after reset, so the value 02 may be output to either the low or the high bus half. If you latch AD0-AD3 and AD8-AD11, one of the nibbles should receive the pattern "0 0 1 0". | |
| Aug 22, 2019 at 7:43 | comment | added | Alex | Or another option for check cpu - you can connect the 16/8 dip switch as a ram, and manually set the command to output the value to the port, where the port is a latch of 74hc. Right? | |
| Aug 21, 2019 at 17:45 | vote | accept | Alex | ||
| Aug 21, 2019 at 8:24 | history | answered | Michael Karcher | CC BY-SA 4.0 |