added building kernel for the V20 MBC

Makefile

@@ -1,4 +1,4 @@
-all: cpm.sys 
+all: cpm.sys cpm816.sys cpmv20.sys
 
 cpmwk.img: base.img
 	cp base.img $@
@@ -76,6 +76,28 @@ cpm.sys: cpm86.h86
 	cpm_gencmd cpm86.h86 8080 "CODE[A51,M0000]"
 	mv cpm86.cmd cpm.sys
 
+cpmv20.sys: cpmv20.h86
+	cpm_gencmd cpmv20.h86 8080 "CODE[A40]"
+	mv cpmv20.cmd cpmv20.sys
+
+cpmv20.bin: cpmv20.sys
+	dd bs=128 skip=1 if=cpmv20.sys of=cpmv20.bin
+
+cpmv20.h86: cpm.h86 mbcv20.h86 
+	doscat cpm.h86 > cpmv20.h86
+	cat mbcv20.h86 >> cpmv20.h86
+
+cpm816.bin: cpm816.sys
+	dd bs=128 skip=1 if=cpm816.sys of=cpm816.bin
+
+cpm816.sys: cpm816.h86
+	cpm_gencmd cpm816.h86 8080 "CODE[A40]"
+	mv cpm816.cmd cpm816.sys
+
+cpm816.h86: cpm.h86 mbc816.h86 
+	doscat cpm.h86 > cpm816.h86
+	cat mbc816.h86 >> cpm816.h86
+
 cpm86.h86: cpm.h86 pcbios.h86
 	doscat cpm.h86 > cpm86.h86
 	cat pcbios.h86 >> cpm86.h86
@@ -90,11 +112,14 @@ cpm.h86: ccp.h86 bdos.h86
 cpmnew: cpm.sys
 	cpmrm -f ibmpc-514ss cpm86-1.img 0:cpm.sys
 	cpmcp -f ibmpc-514ss cpm86-1.img cpm.sys 0:cpm.sys
+	cpmrm -f ibmpc-514ss cpm86-at-1.img 0:cpm.sys
+	cpmcp -f ibmpc-514ss cpm86-at-1.img cpm.sys 0:cpm.sys
 
 clean:
 	rm -rf *.h86 *.lst *.sym *.log
 	rm -rf cpm86.cmd cpm.sys 
 	rm -rf cpm86-at-1.img cpm86-1.img cpm86-2.img cpm86-3.img cpm86-4.img
+	rm -rf cpm816.sys cpmv20.sys cpm816.bin cpmv20.bin
 	rm -rf *.xxd
 
 dist: cpm86-at-1.img cpm86-1.img cpm86-2.img cpm86-3.img cpm86-4.img

README.md

@@ -13,10 +13,19 @@ The distribution also packages digital research assembler tools and various basi
 This is a raw dump right now with a way to compile the kernel starting from dissassembled sources.
 The compilation requires the (cross-development environment for CP/M-86)[https://github.com/tsupplis/cpm86-crossdev]
 
+The CP/M-86 kernels (8088 and V20 Mixed 8080/8088 with CP/M-80 compatibility) for the V20 MBC are also produced. The sources of the bioses used are available at:
+- https://hackaday.io/project/170924-v20-mbc-a-v20-8088-8080-cpu-homebrew-computer
+
+The 3 kernels use the same BDOS and CCP components.
+
 ## Playing with CP/M-86
 
 To test, the PCE emulator and cpmtools are needed. PCE can be found at http://www.hampa.ch/pce/. the floppy images released also work with qemu.
 
+Alternatively, you can use the excellent V20 MBC available at:
+- https://hackaday.io/project/170924-v20-mbc-a-v20-8088-8080-cpu-homebrew-computer
+- https://shop.mcjohn.it/en/diy-kit
+
 - Patched CP/M-86 running in the PCE Emulator
 <p align="center">
 <img src="./images/cpm86.png" width="75%">
@@ -53,6 +62,11 @@ The CP/M-86 OS contains the following commands are in the original distribution:
 - gencmd.cmd
 - stat.cmd
 
+The kernels built arE:
+- cpm86.sys/cpm.sys (ibm pc xt)
+- cpmv20.sys (MBC V20, 8088 mode)
+- cpm816.sys (MBC V20, mixed 8080/8088 mode with CP/M-80 compatibility)
+
 The CP/M-86 OS is enhanced with the following patched or updated components:
 - help.hlp (more complete content)
 - dskmaint.cmd (updated from 1.0 to version 1.2)