and another great step. I tried out Codeview on a C program which called an
assembler subroutine. It was marvellous to be able to step through the program,
setting watch variables and breakpoints and seeing the source code, both C and
assembler, fly by on the screen.
Despite these advances I have happy memories of the old machines and when I
moved house I put together a fully expanded non-disk Nascom 1 system and got it
working before packing it away. I hope one day to find a museum worthy to exhibit
it in full operation, with NAS-SYS, 8K BASIC, ZEAP, NAS-DIS and DEBUG all
in ROM, with a massive 64K of RAM. Good luck.
MAP-80 BIOS 5.02. Enhancements for CP/M Plus
by M Newson
Here are details of extensive modifications that I have done to the MAP CP/M+
BIOS, and these are available from me with the kind permission of MAP-80. Ltd.
- All SETDEF parameters pre-definable on assembly,
- BIT or BINARY drive selection. (BINARY disables ASSIGNABLE feature.)
- All floppy drives may be set to default formats on assembly but are also
re-assignable later by choice. (All except first logical floppy.)
- Physical Winnies greater than 32Mb handled – up to 512Mb.
- DSKSTRUC calculation speeded up – for those who rebuild regularly!
- SASI controller types S1410 or S1420 selectable at assembly.
- Countdown timeout added to Winnie initialisation while waiting for drive ready.
- Winnie error reporting in form TYPE, CODE, LOGADDR >X< CYLNO, HEADNO, SECNO
- “Retry [Y/N/^C] ?” added to floppy and Winnie, with proper UNLOG function,
- ‘Wn’ number added to signon display.
- ‘Fn’ display corrected for n>9.
- Screen centralisation Macros and message generation tidied.
- N2/VSOFT initial screen edit problem overcome.
- WFORMAT modified for multiple passes and retries to evaluate Winnie performance.
I also have a modification for the
MAP 256K RAM
card to convert it to 1 Mb
capacity. For further details of information required to upgrade your system, please
send a SAE to me.