New Assembly Files for MSX, Z80 | 2022/2023

vrcheck.asm

Check amount of VRAM, MSX 1 and up. 16Kbytes up to 512Kbytes, TMS9918A, TMS9928A, TMS9929A, V9938, V9948, V9958, V9978

cpuspeed.asm

Check speed 3.57Mhz, 7.13Mhz, R800 (60hz only)

speedf.asm

Speed of MSX. Value of CPU * 3.57 Mhz, Normal, 7Mhz and R800(OpenMSX) tested. if EMULAT=1 you are in OpenMSX (50 & 60 hz). Using F bit of status register 0

speedf.bin

Build of speedf.asm

Build at &HC000, xcution at same address ..

CPU = &HC092 -> Result R Only
EMULAT = &HC08E -> DOESNT WORK YET
TURBO = &HC08F -> Variable 0,1,2 R800, 0= Z80, 1&2 = R800, W only, used when xcution
RESULT = &HC090 + 1 -> real result, CPU and EMULAT are based on this result, R only
VDP = &HC07A -> routine to toggle 50/60 hz, X only

speedf2.bin

Build of speedf2.asm

Build at &HC000, xcution at same address ..
NTSC= &hC082: 0/2/128/130, W only
TURBO = &HC084 -> Variable 0,1,2 R800, 0= Z80, 1&2 = R800, W only, used when xcution
RESULT = &HC085 + 1 -> real result, CPU and EMULAT are based on this result, R only
VDP = &HC06F -> routine to toggle 50/60 hz, X only

USAGE:
10 bload "speedf2.bin"
20 defusr=&hc000:a=usr(0)
30 print peek(&hc085)
30 goto 20

CTRL-STOP to break
You should see multiple variables on real machine and stable on emulator