lezanderson wrote:68008 CPU (HD/MC68008P12) 12Mhz Max.
The 68SEC000 is the same price and MUCH faster and cooler. Also, two more address lines than the PLCC version and four more than the DIP-48.
I wish Sinclair used the DIP-52 version of the 68008 back then, before the PLCC one was available.
lezanderson wrote:512K SRAM or more
Flash needs to replace EPROMs and it needs to be in system programmable.
lezanderson wrote:CPLD to emulate ZX8301,ZX8302
Oh, make it easy why don't you? If you can do VHDL I can get you the documentation you need - mostly, it's all here and provided with explanations by the very talented Mr. Nasta.
lezanderson wrote:Modern MCU to do functions of 8049 including Handling Microdrives
Microdrives are handled by the 8302. The 8049 does keyboard scanning, sound generation and the receive side of serial.
lezanderson wrote:Extra I/O via ICs like MC68901,68230,68681 etc
And someone to rewrite the OS to support them.
lezanderson wrote:WDC1773 Floppy disc functionality… thou this may be rather obsolete ?
The DP8473 is better supported by drivers, and I have 100 here
lezanderson wrote:SD Card via PIO connectivity.
QL-SD seems to fit the bill.
lezanderson wrote:Real time Clock & Calendar for Time Date: DS12887/DS1310 etc
There's so many RTC choices it's sickening....
lezanderson wrote:Voltage Regulator to supply +12V, +5V to Board.
If you replace the MC1488/1489 with a single voltage serial transceiver, you don't even need +/= 12V.
Yes, we've all had these thoughts 1000 times.