Hello My congratulations to John on the release of UNA BIOS version 1.0!
The latest release of UNA CP/M, a CP/M 2.2 for UNA BIOS systems, can be found here: http://sowerbutts.com/8bit/unacpm-2014-08-01.zip This includes ROM images, compiled utilities, source code and documentation. The source code is GPL licensed. It was a challenge to write a CP/M to match the runtime reconfigurability of UNA BIOS. UNA CP/M allows the user to choose any drive mapping they wish, and later modify it with the included REMAP program. For example the command line "REMAP RAM0 ROM0 IDE0 SD0.3" would map the RAM disk as A:, ROM disk as B:, slice 0 on the first IDE disk as C:, and slice 3 on the first SD card as D: UNA CP/M is structured as a two-stage program. The first stage handles the initialisation of the system and constructs the second (residual) stage in memory. When the initialisation code has finished it is discarded, with control passing to the residual second stage which implements CP/M. This division allows the size of the residual CP/M to be minimised and the initialisation code to be written in C. The size of the transient program area is adjusted according to number and size of the mapped drives by relocating the residual CP/M to run at different addresses in memory. UNA CP/M's residual CBIOS is based in part on the RomWBW CBIOS by Wayne Warthen, Andrew Lynch and other contributors to the N8VEM project. UNA CP/M currently builds under Linux using the SDCC tools. The 512K ROM image included in the release ("512K-ROM.bin") is made by concatenating UNA BIOS 1.0, UNA CP/M 2014-08-01, John's reflash utility, and a ROM disk image with some utilities: $ cat UNA-bios.bin cpm.rom fsfat.bin rom384.cpmfs > 512K-ROM.bin "UNA-bios.bin" and "fsfat.bin" are from UNA BIOS. "cpm.rom" is from UNA CP/M. "rom384.cpmfs" is a CP/M ROM filesystem image. The cpmtools disk definition for the 384KB ROM disk is as follows: # 384KB ROM disk diskdef n8vem_rom384 seclen 512 tracks 12 sectrk 64 blocksize 2048 maxdir 256 skew 0 boottrk 0 os 2.2 end Feedback is welcomed. Thanks Will _________________________________________________________________________ William R Sowerbutts [email protected] "Carpe post meridiem" http://sowerbutts.com main(){char*s=">#=0> ^#X@#@^7=",c=0,m;for(;c<15;c++)for (m=-1;m<7;putchar(m++/6&c%3/2?10:s[c]-31&1<<m?42:32));} -- You received this message because you are subscribed to the Google Groups "N8VEM" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/n8vem. For more options, visit https://groups.google.com/d/optout.
