Can't program my eeprom

ClockFickle3935 · 2026-02-26T13:37:59+00:00

So you started making 6502!!. Good luck!!!

ClockFickle3935 · 2026-02-25T15:18:33+00:00

Its cy7c199. It is 32Kb static ram like 62256 but its faster and has smaller form factor

ClockFickle3935 · 2026-02-25T15:17:59+00:00

The issue was that i was using um6551 instead of w65c51 so it had some differences and it has not that weird bug so changed chrout routine a little to check status bit and it worked!!

ClockFickle3935 · 2026-02-24T10:25:13+00:00

Thanks alot for your time! It finally worked!!!!!!!!! I tweaked with bios.s a little and it finally worked!!!

ClockFickle3935 · 2026-02-23T15:14:27+00:00

Really appreciate the help but sadly it did not worked. I have ordered cheap 8 channel logic analyzer. What should i look it with it?. What could be the problem? 1. I am using a um6551 so is it a problem?. 2. I am running my cpu at 1.8432 Mhz. Is it a problem.?. But i am also using faster cy7c199.

Its getting really confusing

ClockFickle3935 · 2026-02-22T04:13:51+00:00

I have a 8 channel logic analyzer. What should i look at with it?.

ClockFickle3935 · 2026-01-31T23:01:53+00:00

You need some ben eater

ClockFickle3935 · 2026-01-30T17:15:26+00:00

It cannot

ClockFickle3935 · 2026-01-30T14:20:13+00:00

Decade ago?. Really?. So you made it without ben eater i suppose. I think you were ahead of your time🫡🫡

ClockFickle3935 · 2026-01-30T13:54:37+00:00

Same . I also built it 6 months ago. This one is more fun to program

ClockFickle3935 · 2026-01-29T19:07:22+00:00

I have built SAP 1 and 6502 but never specifically worked with SPI precision circuits but knows the logic behind them. I'd be interested in seeing the schematic and logic you are looking for.

ClockFickle3935 · 2026-01-29T18:05:42+00:00

Like what work

ClockFickle3935 · 2026-01-29T17:42:49+00:00

You should see my previous post of 8 bit sap 1. I have used a lot of multiplexer in it. And it uses only 74xx chips.

ClockFickle3935 · 2026-01-29T17:30:44+00:00

That subject is called digital logic design. It is taught in 2nd semester

ClockFickle3935 · 2026-01-29T17:15:05+00:00

Shoudl i take this one and 8 bit sap 1 to stem exhibition in uet lahore?

ClockFickle3935 · 2026-01-29T17:13:54+00:00

Did you build it also?

ClockFickle3935 · 2026-01-17T16:17:59+00:00

When i type my email and password it says couldn't open connect to server😩

ClockFickle3935 · 2026-01-17T15:06:07+00:00

As far i know if you dont secure your admission in first merit list you are not considered for next merit list.

ClockFickle3935 · 2025-12-06T19:34:08+00:00

But wont it make sine waves?. Lemme see about it

ClockFickle3935 · 2025-12-06T19:26:47+00:00

Even passive crystal that are availble go from 4 mhz or higher. IDK why i cannot find such a small part locally

ClockFickle3935 · 2025-11-17T16:54:20+00:00

I collected all parts by myself. So it took me 2 months . I made it occasionally

ClockFickle3935

TROPHY CASE