Re: [Etherboot-users] BOOT ROM doesn't work on the ISA card

[Igor M. <i.m...@sw...>]

>>floppy. It loaded from the PCI NIC's (3C905 or rtl8139) ROM socket too and wo
>>rks 
>>with DE220 card in prospect.
>>
>>But it doesn't work when I put ROM into DE220's boot ROM socket. rom-scan 
>>utility doesn't detect ROM at all.
>>
>>A 'Boot ROM 16K' option is active, I set it using DOS setup program.
>>
>>It looks like my Etherboot BOOT ROM code doesn't work for ISA card... What's 
>>wrong?
> 
> 
> You didn't put a 32kB or 64kB ROM in a 16kB slot I hope?

I made 16K ROM image and programmed it into 32kB Flash (Atmel AT29C256, DIP28, 
70ns).

> Maybe your ROM isn't fast enough (low access time). Many of those NE2000
> clones connected the ROM to the bus through a buffer only with no wait
> states requested of the CPU so the ROM has to come up with the data
> within one read cycle.

This situation repeats for SMC9000 ISA card too (SMC91C94, BOOT ROM enable, 
32K). Honestly, I got the troubles with SMC9000 firstly and decided to check it 
with NE2000-compatible NIC. The both of this NICs work with BOOT ROM, I check it 
with old proprietary BOOT ROM. And, as far back I can remember, I was able to 
create Etherboot ROMs for such cards before (using Etherboot).

Regards,
Igor.